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Mac Magazin/MacEasy 19
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Mac Magazin and MacEasy Magazine CD - Issue 19.iso
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Utilities
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uae-0.4
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Source Code
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custom.c
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1996-02-13
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/*
* UAE - The Un*x Amiga Emulator
*
* Custom chip emulation
*
* (c) 1995 Bernd Schmidt, Alessandro Bissacco
*/
#include <ctype.h>
#ifdef __unix
#include <sys/time.h>
#include <unistd.h>
#endif
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <assert.h>
#include "config.h"
#include "amiga.h"
#include "options.h"
#include "events.h"
#include "memory.h"
#include "custom.h"
#include "cia.h"
#include "disk.h"
#include "blit.h"
#include "xwin.h"
#include "os.h"
#define DMA_AUD0 0x0001
#define DMA_AUD1 0x0002
#define DMA_AUD2 0x0004
#define DMA_AUD3 0x0008
#define DMA_DISK 0x0010
#define DMA_SPRITE 0x0020
#define DMA_BLITTER 0x0040
#define DMA_COPPER 0x0080
#define DMA_BITPLANE 0x0100
#define DMA_BLITPRI 0x0400
/* These are default values for mouse emulation.
* The first two are default values for mstepx and mstepy.
* The second line set the orizontal and vertical offset for amiga and X
* pointer matching
*/
#define defstepx (1<<16)
#define defstepy (1<<16)
#ifndef __mac__
#define defxoffs 0
#define defyoffs 0
#else
#define defxoffs 210
#define defyoffs 85
#endif
/* Values below define mouse auto calibration process.
* They are not critical, change them if you want.
* The most important is calweight, which sets mouse adjustement rate */
static const int docal = 60, xcaloff = 40, ycaloff = 20;
static const int calweight = 3;
static int lastsampledmx, lastsampledmy;
/*
* Events
*/
unsigned long int cycles, nextevent, nextev_count, specialflags;
int vpos;
UWORD lof;
struct ev eventtab[ev_max];
bool copper_active;
static const int maxhpos = 227,maxvpos = 312;
static const int dskdelay = 2; /* FIXME: ??? */
static const int minfirstline = 29;
/*
* hardware register values that are visible/can be written to by someone
*/
static UWORD cregs[256];
static UWORD dmacon,intena,intreq,adkcon;
static ULONG cop1lc,cop2lc,copcon;
static CPTR bpl1pt,bpl2pt,bpl3pt,bpl4pt,bpl5pt,bpl6pt;
static ULONG bpl1dat,bpl2dat,bpl3dat,bpl4dat,bpl5dat,bpl6dat;
static UWORD bplcon0,bplcon1,bplcon2,bplcon3;
static UWORD diwstrt,diwstop,ddfstrt,ddfstop;
static WORD bpl1mod,bpl2mod;
static UWORD sprdata[8], sprdatb[8], sprctl[8], sprpos[8];
static ULONG sprpt[8];
static bool sprarmed[8], sprptset[8];
/* Kludge. FIXME: How does sprite restart after vsync work? */
static int spron[8];
static UWORD bltadat,bltbdat,bltcdat,bltddat,bltafwm,bltalwm,bltsize;
static WORD bltamod,bltbmod,bltcmod,bltdmod;
static UWORD bltcon0,bltcon1;
static ULONG bltapt,bltbpt,bltcpt,bltdpt,bltcnxlpt,bltdnxlpt;
static ULONG dskpt;
static UWORD dsklen,dsksync;
static int joy0x, joy1x, joy0y, joy1y;
static int lastspr0x,lastspr0y,lastdiffx,lastdiffy,spr0pos,spr0ctl;
static int mstepx,mstepy,xoffs=defxoffs,yoffs=defyoffs;
static int sprvbfl;
static enum { normal_mouse, dont_care_mouse, follow_mouse} mousestate;
xcolnr acolors[64];
UWORD color_regs[32];
/*
* "hidden" hardware registers
*/
static int dblpf_ind1[64], dblpf_ind2[64];
static ULONG coplc;
static UWORD copi1,copi2;
static enum {
COP_stop, COP_read, COP_wait, COP_move, COP_skip
} copstate;
static UWORD vblitsize,hblitsize,blitpreva,blitprevb;
static UWORD blitlpos,blitashift,blitbshift,blinea,blineb;
static bool blitline,blitfc,blitzero,blitfill,blitife,blitdesc,blitsing;
static bool blitonedot,blitsign;
static long int bltwait;
static int dsklength;
static enum {
BLT_done, BLT_init, BLT_read, BLT_work, BLT_write, BLT_next
} bltstate;
static int plffirstline,plflastline,plfstrt,plfstop,plflinelen;
static int diwfirstword,diwlastword;
static int plf1pri, plf2pri;
int dskdmaen; /* used in cia.c */
static UWORD dskmfm,dskbyte,dsktime;
static bool dsksynced;
static int bpldelay1;
static int bpldelay2;
static bool bplhires;
static int bplplanecnt;
static bool pfield_fullline,pfield_linedone;
static bool pfield_linedmaon;
static int pfield_lastpart_hpos;
unsigned char apixels[1000]; /* includes a lot of safety padding */
char spixels[1000]; /* for sprites */
char spixstate[1000]; /* more sprites */
/*
* Statistics
*/
static unsigned long int msecs = 0, frametime = 0, timeframes = 0;
static unsigned long int seconds_base;
bool bogusframe;
/*
* helper functions
*/
static void pfield_doline_slow(int);
static void pfield_doline(void);
static void pfield_hsync(int);
bool inhibit_frame;
static int framecnt = 0;
static __inline__ void count_frame(void)
{
if (inhibit_frame)
framecnt = 1;
else {
framecnt++;
if (framecnt == framerate)
framecnt = 0;
}
}
static __inline__ void setclr(UWORD *p, UWORD val)
{
if (val & 0x8000) {
*p |= val & 0x7FFF;
} else {
*p &= ~val;
}
}
bool dmaen(UWORD dmamask)
{
return (dmamask & dmacon) && (dmacon & 0x200);
}
static __inline__ int current_hpos(void)
{
return cycles - eventtab[ev_hsync].oldcycles;
}
static void calcdiw(void)
{
diwfirstword = (diwstrt & 0xFF) * 2 - 0x60;
diwlastword = (diwstop & 0xFF) * 2 + 0x200 - 0x60;
if (diwfirstword < 0) diwfirstword = 0;
plffirstline = diwstrt >> 8;
plflastline = diwstop >> 8;
#if 0
/* This happens far too often. */
if (plffirstline < minfirstline) {
fprintf(stderr, "Warning: Playfield begins before line %d!\n", minfirstline);
plffirstline = minfirstline;
}
#endif
if ((plflastline & 0x80) == 0) plflastline |= 0x100;
#if 0 /* Turrican does this */
if (plflastline > 313) {
fprintf(stderr, "Warning: Playfield out of range!\n");
plflastline = 313;
}
#endif
plfstrt = ddfstrt;
plfstop = ddfstop;
if (plfstrt < 0x18) plfstrt = 0x18;
if (plfstop > 0xD8) plfstop = 0xD8;
if (plfstrt > plfstop) plfstrt = plfstop;
/*
* Prize question: What are the next lines supposed to be?
* I can't seem to get it right.
*/
#if 0
/* Pretty good guess, but wrong. */
plflinelen = (plfstop-plfstrt+15) & ~7;
plfstrt &= ~(bplhires ? 3 : 7);
plfstop &= ~(bplhires ? 3 : 7);
#endif
plfstrt &= ~(bplhires ? 3 : 3);
plfstop &= ~(bplhires ? 3 : 3);
plflinelen = (plfstop-plfstrt+15) & ~7;
}
static void pfield_may_need_update(bool colreg)
{
int i;
/* Ignore, if this happened before or after the DDF window */
if (framecnt != 0 || !pfield_linedmaon || current_hpos() <= plfstrt
|| vpos < plffirstline || vpos >= plflastline)
{
return;
}
/*
* If a color reg was modified, it is only important if we are within
* the DIW.
*/
if (current_hpos() <= (diwfirstword+0x60)/4 && colreg)
return;
/*
* If we are past the DDF window, me might as well draw the complete
* line now.
*/
if (current_hpos() > plfstrt + plflinelen && pfield_fullline) {
if (!pfield_linedone)
pfield_doline();
pfield_linedone = true;
return;
}
if (pfield_fullline) {
pfield_lastpart_hpos = 0;
memset(apixels, 0, sizeof(apixels));
pfield_fullline = false;
} else {
assert(pfield_lastpart_hpos <= current_hpos());
}
for (i = pfield_lastpart_hpos; i < current_hpos(); i++) {
pfield_doline_slow(i);
}
pfield_lastpart_hpos = current_hpos();
}
/* Apparently, the DMA bit is tested by the hardware at some point,
* presumably at the ddfstart position, to determine whether it
* ought to draw the line.
* This is probably not completely correct, but should not matter
* very much.
*/
static void pfield_calclinedma(void)
{
if (current_hpos() >= plfstrt)
return;
pfield_linedmaon = dmaen(DMA_BITPLANE);
}
/*
* register functions
*/
static UWORD DMACONR(void)
{
return (dmacon | (bltstate==BLT_done ? 0 : 0x4000)
| (blitzero ? 0x2000 : 0));
}
static UWORD INTENAR(void) { return intena; }
static UWORD INTREQR(void) { return intreq; }
static UWORD ADKCONR(void) { return adkcon; }
static UWORD VPOSR(void) { return (vpos >> 8) | lof; }
static void VPOSW(UWORD v) { lof = v & 0x8000; }
static UWORD VHPOSR(void) { return (vpos << 8) | current_hpos(); }
static void COP1LCH(UWORD v) { cop1lc= (cop1lc & 0xffff) | ((ULONG)v << 16); }
static void COP1LCL(UWORD v) { cop1lc= (cop1lc & ~0xffff) | v; }
static void COP2LCH(UWORD v) { cop2lc= (cop2lc & 0xffff) | ((ULONG)v << 16); }
static void COP2LCL(UWORD v) { cop2lc= (cop2lc & ~0xffff) | v; }
static void COPJMP1(UWORD a)
{
coplc = cop1lc; copstate = COP_read;
eventtab[ev_copper].active = 1; eventtab[ev_copper].oldcycles = cycles;
eventtab[ev_copper].evtime = 4; events_schedule();
copper_active = true;
}
static void COPJMP2(UWORD a)
{
coplc = cop2lc; copstate = COP_read;
eventtab[ev_copper].active = 1; eventtab[ev_copper].oldcycles = cycles;
eventtab[ev_copper].evtime = 4; events_schedule();
copper_active = true;
}
static void DMACON(UWORD v)
{
UWORD oldcon = dmacon;
setclr(&dmacon,v); dmacon &= 0x1FFF;
pfield_calclinedma();
if ((dmacon & DMA_COPPER) > (oldcon & DMA_COPPER)) {
COPJMP1(0); /* @@@ not sure how this works */
}
if (copper_active && !eventtab[ev_copper].active) {
eventtab[ev_copper].active = true;
eventtab[ev_copper].oldcycles = cycles;
eventtab[ev_copper].evtime = 1;
events_schedule();
}
}
static void INTENA(UWORD v) { setclr(&intena,v); specialflags |= SPCFLAG_INT; }
static void INTREQ(UWORD v) { setclr(&intreq,v); specialflags |= SPCFLAG_INT; }
static void ADKCON(UWORD v) { setclr(&adkcon,v); }
static void BPL1PTH(UWORD v) { bpl1pt= (bpl1pt & 0xffff) | ((ULONG)v << 16); }
static void BPL1PTL(UWORD v) { bpl1pt= (bpl1pt & ~0xffff) | v; }
static void BPL2PTH(UWORD v) { bpl2pt= (bpl2pt & 0xffff) | ((ULONG)v << 16); }
static void BPL2PTL(UWORD v) { bpl2pt= (bpl2pt & ~0xffff) | v; }
static void BPL3PTH(UWORD v) { bpl3pt= (bpl3pt & 0xffff) | ((ULONG)v << 16); }
static void BPL3PTL(UWORD v) { bpl3pt= (bpl3pt & ~0xffff) | v; }
static void BPL4PTH(UWORD v) { bpl4pt= (bpl4pt & 0xffff) | ((ULONG)v << 16); }
static void BPL4PTL(UWORD v) { bpl4pt= (bpl4pt & ~0xffff) | v; }
static void BPL5PTH(UWORD v) { bpl5pt= (bpl5pt & 0xffff) | ((ULONG)v << 16); }
static void BPL5PTL(UWORD v) { bpl5pt= (bpl5pt & ~0xffff) | v; }
static void BPL6PTH(UWORD v) { bpl6pt= (bpl6pt & 0xffff) | ((ULONG)v << 16); }
static void BPL6PTL(UWORD v) { bpl6pt= (bpl6pt & ~0xffff) | v; }
/*
* I've seen the listing of an example program that changes
* from lo- to hires while a line is being drawn. That's
* awful, but we want to emulate it.
*/
static void BPLCON0(UWORD v)
{
pfield_may_need_update(false);
bplcon0 = v;
bplhires = (bplcon0 & 0x8000) == 0x8000;
bplplanecnt = (bplcon0 & 0x7000) >> 12;
calcdiw(); /* This should go away. */
}
static void BPLCON1(UWORD v)
{
pfield_may_need_update(false);
bplcon1 = v;
bpldelay1 = bplcon1 & 0xF;
bpldelay2 = (bplcon1 >> 4) & 0xF;
}
static void BPLCON2(UWORD v)
{
pfield_may_need_update(false);
bplcon2 = v;
plf1pri = 1 << 2*(v & 7);
plf2pri = 1 << 2*((v>>3) & 7);
}
static void BPLCON3(UWORD v) { pfield_may_need_update(false); bplcon3 = v; }
static void BPL1MOD(UWORD v) { pfield_may_need_update(false); bpl1mod = v; }
static void BPL2MOD(UWORD v) { pfield_may_need_update(false); bpl2mod = v; }
static void BPL1DAT(UWORD v) { bpl1dat = v; }
static void BPL2DAT(UWORD v) { bpl2dat = v; }
static void BPL3DAT(UWORD v) { bpl3dat = v; }
static void BPL4DAT(UWORD v) { bpl4dat = v; }
static void BPL5DAT(UWORD v) { bpl5dat = v; }
static void BPL6DAT(UWORD v) { bpl6dat = v; }
/* We call pfield_may_need_update() from here. Actually,
* I have no idea what happens if someone changes ddf or
* diw mid-line, and I don't really want to know. I doubt
* that this sort of thing was ever used to create a
* useful effect.
*/
static void DIWSTRT(UWORD v) { pfield_may_need_update(false); diwstrt = v; calcdiw(); }
static void DIWSTOP(UWORD v) { pfield_may_need_update(false); diwstop = v; calcdiw(); }
static void DDFSTRT(UWORD v) { pfield_may_need_update(false); ddfstrt = v; calcdiw(); }
static void DDFSTOP(UWORD v) { pfield_may_need_update(false); ddfstop = v; calcdiw(); }
static void BLTADAT(UWORD v) { bltadat = v; }
static void BLTBDAT(UWORD v) { bltbdat = v; }
static void BLTCDAT(UWORD v) { bltcdat = v; }
static void BLTAMOD(UWORD v) { bltamod = v; }
static void BLTBMOD(UWORD v) { bltbmod = v; }
static void BLTCMOD(UWORD v) { bltcmod = v; }
static void BLTDMOD(UWORD v) { bltdmod = v; }
static void BLTCON0(UWORD v) { bltcon0 = v; }
static void BLTCON1(UWORD v) { bltcon1 = v; }
static void BLTAFWM(UWORD v) { bltafwm = v; }
static void BLTALWM(UWORD v) { bltalwm = v; }
static void BLTAPTH(UWORD v) { bltapt= (bltapt & 0xffff) | ((ULONG)v << 16); }
static void BLTAPTL(UWORD v) { bltapt= (bltapt & ~0xffff) | (v); }
static void BLTBPTH(UWORD v) { bltbpt= (bltbpt & 0xffff) | ((ULONG)v << 16); }
static void BLTBPTL(UWORD v) { bltbpt= (bltbpt & ~0xffff) | (v); }
static void BLTCPTH(UWORD v) { bltcpt= (bltcpt & 0xffff) | ((ULONG)v << 16); }
static void BLTCPTL(UWORD v) { bltcpt= (bltcpt & ~0xffff) | (v); }
static void BLTDPTH(UWORD v) { bltdpt= (bltdpt & 0xffff) | ((ULONG)v << 16); }
static void BLTDPTL(UWORD v) { bltdpt= (bltdpt & ~0xffff) | (v); }
static void BLTSIZE(UWORD v) { bltsize = v; bltstate = BLT_init; specialflags |= SPCFLAG_BLIT; }
static void SPRxCTL(UWORD v, int num) { pfield_may_need_update(false); sprctl[num] = v; sprarmed[num] = false; spron[num] |= 2; }
static void SPRxPOS(UWORD v, int num) { pfield_may_need_update(false); sprpos[num] = v; }
static void SPRxDATA(UWORD v, int num) { pfield_may_need_update(false); sprdata[num] = v; sprarmed[num] = true; }
static void SPRxDATB(UWORD v, int num) { pfield_may_need_update(false); sprdatb[num] = v; }
static void SPRxPTH(UWORD v, int num) { sprpt[num] &= 0xffff; sprpt[num] |= (ULONG)v << 16; spron[num] |= 1; }
static void SPRxPTL(UWORD v, int num) { sprpt[num] &= ~0xffff; sprpt[num] |= v; spron[num] |= 1; }
static void COLOR(UWORD v, int num)
{
pfield_may_need_update(true);
color_regs[num] = v;
acolors[num] = xcolors[v];
acolors[num+32] = xcolors[(v >> 1) & 0x777];
}
static void DSKSYNC(UWORD v) { dsksync = v; }
static void DSKDAT(UWORD v) { dskmfm = v; }
static void DSKPTH(UWORD v) { dskpt = (dskpt & 0xffff) | ((ULONG)v << 16); }
static void DSKPTL(UWORD v) { dskpt = (dskpt & ~0xffff) | (v); }
static void DSKLEN(UWORD v)
{
if (v & 0x8000) { dskdmaen++; } else { dskdmaen = 0; }
dsktime = dskdelay; dsksynced = false;
dsklen = dsklength = v; dsklength &= 0x3fff;
if (dskdmaen == 2 && dsksync != 0x4489 && (adkcon & 0x400)) {
printf("Non-standard sync: %04x len: %x\n", dsksync, dsklength);
}
if (dsklen & 0x4000) DISK_InitWrite();
if (dskdmaen) specialflags |= SPCFLAG_DISK;
}
static UWORD DSKBYTR(void)
{
UWORD v = (dsklen >> 1) & 0x6000;
v |= dskbyte;
dskbyte &= ~0x8000;
if (dsksync == dskmfm) v |= 0x1000;
return v;
}
static UWORD DSKDATR(void) { return dskmfm; }
static UWORD POTGOR(void)
{
if (!buttonstate[2]) {
return 0xffff;
} else {
return 0xbbff;
}
}
static UWORD JOY0DAT(void) { return joy0x + (joy0y << 8); }
static UWORD JOY1DAT(void)
{
#ifdef HAVE_JOYSTICK
UWORD dir;
bool button;
read_joystick(&dir, &button);
buttonstate[1] = button;
return dir;
#else
return joy1x + (joy1y << 8);
#endif
}
static void JOYTEST(UWORD v)
{
joy0x = joy1x = v & 0xFC;
joy0y = joy1y = (v >> 8) & 0xFC;
}
static void AUD0LCH(UWORD v) { audlc[0] = (audlc[0] & 0xffff) | ((ULONG)v << 16); }
static void AUD0LCL(UWORD v) { audlc[0] = (audlc[0] & ~0xffff) | v; }
static void AUD1LCH(UWORD v) { audlc[1] = (audlc[1] & 0xffff) | ((ULONG)v << 16); }
static void AUD1LCL(UWORD v) { audlc[1] = (audlc[1] & ~0xffff) | v; }
static void AUD2LCH(UWORD v) { audlc[2] = (audlc[2] & 0xffff) | ((ULONG)v << 16); }
static void AUD2LCL(UWORD v) { audlc[2] = (audlc[2] & ~0xffff) | v; }
static void AUD3LCH(UWORD v) { audlc[3] = (audlc[3] & 0xffff) | ((ULONG)v << 16); }
static void AUD3LCL(UWORD v) { audlc[3] = (audlc[3] & ~0xffff) | v; }
static void AUD0PER(UWORD v) { audper[0] = v; }
static void AUD1PER(UWORD v) { audper[1] = v; }
static void AUD2PER(UWORD v) { audper[2] = v; }
static void AUD3PER(UWORD v) { audper[3] = v; }
static void AUD0VOL(UWORD v) { audvol[0] = v; }
static void AUD1VOL(UWORD v) { audvol[1] = v; }
static void AUD2VOL(UWORD v) { audvol[2] = v; }
static void AUD3VOL(UWORD v) { audvol[3] = v; }
static void AUD0LEN(UWORD v) { audlen[0] = v; }
static void AUD1LEN(UWORD v) { audlen[1] = v; }
static void AUD2LEN(UWORD v) { audlen[2] = v; }
static void AUD3LEN(UWORD v) { audlen[3] = v; }
/* Custom chip memory bank */
static ULONG custom_lget(CPTR) REGPARAM;
static UWORD custom_wget(CPTR) REGPARAM;
static UBYTE custom_bget(CPTR) REGPARAM;
static void custom_lput(CPTR, ULONG) REGPARAM;
static void custom_wput(CPTR, UWORD) REGPARAM;
static void custom_bput(CPTR, UBYTE) REGPARAM;
addrbank custom_bank = {
custom_lget, custom_wget, custom_bget,
custom_lput, custom_wput, custom_bput,
default_xlate, default_check
};
UWORD custom_wget(CPTR addr)
{
#ifdef DUALCPU
customacc = true;
#endif
switch(addr & 0x1FE) {
case 0x002: return DMACONR();
case 0x004: return VPOSR();
case 0x006: return VHPOSR();
case 0x008: return DSKDATR();
case 0x016: return POTGOR();
case 0x01A: return DSKBYTR();
case 0x01C: return INTENAR();
case 0x01E: return INTREQR();
case 0x010: return ADKCONR();
case 0x00A: return JOY0DAT();
case 0x00C: return JOY1DAT();
default:
custom_wput(addr,0);
return 0xffff;
}
}
UBYTE custom_bget(CPTR addr)
{
return custom_wget(addr & 0xfffe) >> (addr & 1 ? 0 : 8);
}
ULONG custom_lget(CPTR addr)
{
return ((ULONG)custom_wget(addr & 0xfffe) << 16) | custom_wget((addr+2) & 0xfffe);
}
void custom_wput(CPTR addr, UWORD value)
{
#ifdef DUALCPU
customacc = true;
#endif
addr &= 0x1FE;
cregs[addr>>1] = value;
switch(addr) {
case 0x020: DSKPTH(value); break;
case 0x022: DSKPTL(value); break;
case 0x024: DSKLEN(value); break;
case 0x026: DSKDAT(value); break;
case 0x02A: VPOSW(value); break;
case 0x040: BLTCON0(value); break;
case 0x042: BLTCON1(value); break;
case 0x044: BLTAFWM(value); break;
case 0x046: BLTALWM(value); break;
case 0x050: BLTAPTH(value); break;
case 0x052: BLTAPTL(value); break;
case 0x04C: BLTBPTH(value); break;
case 0x04E: BLTBPTL(value); break;
case 0x048: BLTCPTH(value); break;
case 0x04A: BLTCPTL(value); break;
case 0x054: BLTDPTH(value); break;
case 0x056: BLTDPTL(value); break;
case 0x058: BLTSIZE(value); break;
case 0x064: BLTAMOD(value); break;
case 0x062: BLTBMOD(value); break;
case 0x060: BLTCMOD(value); break;
case 0x066: BLTDMOD(value); break;
case 0x070: BLTCDAT(value); break;
case 0x072: BLTBDAT(value); break;
case 0x074: BLTADAT(value); break;
case 0x07E: DSKSYNC(value); break;
case 0x080: COP1LCH(value); break;
case 0x082: COP1LCL(value); break;
case 0x084: COP2LCH(value); break;
case 0x086: COP2LCL(value); break;
case 0x088: COPJMP1(value); break;
case 0x08A: COPJMP2(value); break;
case 0x08E: DIWSTRT(value); break;
case 0x090: DIWSTOP(value); break;
case 0x092: DDFSTRT(value); break;
case 0x094: DDFSTOP(value); break;
case 0x096: DMACON(value); break;
case 0x09A: INTENA(value); break;
case 0x09C: INTREQ(value); break;
case 0x09E: ADKCON(value); break;
case 0x0A0: AUD0LCH(value); break;
case 0x0A2: AUD0LCL(value); break;
case 0x0A4: AUD0LEN(value); break;
case 0x0A6: AUD0PER(value); break;
case 0x0A8: AUD0VOL(value); break;
case 0x0B0: AUD1LCH(value); break;
case 0x0B2: AUD1LCL(value); break;
case 0x0B4: AUD1LEN(value); break;
case 0x0B6: AUD1PER(value); break;
case 0x0B8: AUD1VOL(value); break;
case 0x0C0: AUD2LCH(value); break;
case 0x0C2: AUD2LCL(value); break;
case 0x0C4: AUD2LEN(value); break;
case 0x0C6: AUD2PER(value); break;
case 0x0C8: AUD2VOL(value); break;
case 0x0D0: AUD3LCH(value); break;
case 0x0D2: AUD3LCL(value); break;
case 0x0D4: AUD3LEN(value); break;
case 0x0D6: AUD3PER(value); break;
case 0x0D8: AUD3VOL(value); break;
case 0x0E0: BPL1PTH(value); break;
case 0x0E2: BPL1PTL(value); break;
case 0x0E4: BPL2PTH(value); break;
case 0x0E6: BPL2PTL(value); break;
case 0x0E8: BPL3PTH(value); break;
case 0x0EA: BPL3PTL(value); break;
case 0x0EC: BPL4PTH(value); break;
case 0x0EE: BPL4PTL(value); break;
case 0x0F0: BPL5PTH(value); break;
case 0x0F2: BPL5PTL(value); break;
case 0x0F4: BPL6PTH(value); break;
case 0x0F6: BPL6PTL(value); break;
case 0x100: BPLCON0(value); break;
case 0x102: BPLCON1(value); break;
case 0x104: BPLCON2(value); break;
case 0x106: BPLCON3(value); break;
case 0x108: BPL1MOD(value); break;
case 0x10A: BPL2MOD(value); break;
case 0x110: BPL1DAT(value); break;
case 0x112: BPL2DAT(value); break;
case 0x114: BPL3DAT(value); break;
case 0x116: BPL4DAT(value); break;
case 0x118: BPL5DAT(value); break;
case 0x11A: BPL6DAT(value); break;
case 0x180: case 0x182: case 0x184: case 0x186: case 0x188: case 0x18A:
case 0x18C: case 0x18E: case 0x190: case 0x192: case 0x194: case 0x196:
case 0x198: case 0x19A: case 0x19C: case 0x19E: case 0x1A0: case 0x1A2:
case 0x1A4: case 0x1A6: case 0x1A8: case 0x1AA: case 0x1AC: case 0x1AE:
case 0x1B0: case 0x1B2: case 0x1B4: case 0x1B6: case 0x1B8: case 0x1BA:
case 0x1BC: case 0x1BE:
COLOR(value & 0xFFF, (addr & 0x3E) / 2);
break;
case 0x120: case 0x124: case 0x128: case 0x12C:
case 0x130: case 0x134: case 0x138: case 0x13C:
SPRxPTH(value, (addr - 0x120) / 4);
break;
case 0x122: case 0x126: case 0x12A: case 0x12E:
case 0x132: case 0x136: case 0x13A: case 0x13E:
SPRxPTL(value, (addr - 0x122) / 4);
break;
case 0x140: case 0x148: case 0x150: case 0x158:
case 0x160: case 0x168: case 0x170: case 0x178:
SPRxPOS(value, (addr - 0x140) / 8);
break;
case 0x142: case 0x14A: case 0x152: case 0x15A:
case 0x162: case 0x16A: case 0x172: case 0x17A:
SPRxCTL(value, (addr - 0x142) / 8);
break;
case 0x144: case 0x14C: case 0x154: case 0x15C:
case 0x164: case 0x16C: case 0x174: case 0x17C:
SPRxDATA(value, (addr - 0x144) / 8);
break;
case 0x146: case 0x14E: case 0x156: case 0x15E:
case 0x166: case 0x16E: case 0x176: case 0x17E:
SPRxDATB(value, (addr - 0x146) / 8);
break;
case 0x36: JOYTEST(value); break;
}
}
void custom_bput(CPTR addr, UBYTE value)
{
/* Yes, there are programs that do this. The programmers should be shot.
* This might actually work sometimes. */
UWORD rval = value;
CPTR raddr = addr & 0x1FE;
if (addr & 1) {
rval |= cregs[raddr >> 1] & 0xFF00;
} else {
rval <<= 8;
rval |= cregs[raddr >> 1] & 0xFF;
}
custom_wput(raddr, rval);
}
void custom_lput(CPTR addr, ULONG value)
{
custom_wput(addr & 0xfffe, value >> 16);
custom_wput((addr+2) & 0xfffe, (UWORD)value);
}
static bool copcomp(void)
{
UWORD vp = vpos & (((copi2 >> 8) & 0x7F) | 0x80);
UWORD hp = current_hpos() & (copi2 & 0xFE);
UWORD vcmp = copi1 >> 8;
UWORD hcmp = copi1 & 0xFE;
return (vp > vcmp || (vp == vcmp && hp >= hcmp)) && ((copi2 & 0x8000) || !(DMACONR() & 0x4000));
}
/*
* Calculate the minimum number of cycles after which the
* copper comparison becomes true. This is quite tricky. I hope it works.
*/
static int calc_copcomp_true(int currvpos, int currhpos)
{
UWORD vp = currvpos & (((copi2 >> 8) & 0x7F) | 0x80);
UWORD hp = currhpos & (copi2 & 0xFE);
UWORD vcmp = copi1 >> 8;
UWORD hcmp = copi1 & 0xFE;
int cycleadd = maxhpos - currhpos;
int coptime = 0;
if ((vp > vcmp || (vp == vcmp && hp >= hcmp)) && ((copi2 & 0x8000) || !(DMACONR() & 0x4000)))
return 0;
try_again:
while (vp < vcmp) {
currvpos++;
if (currvpos > maxvpos + 1)
return -1;
currhpos = 0;
coptime += cycleadd;
cycleadd = maxhpos;
vp = currvpos & (((copi2 >> 8) & 0x7F) | 0x80);
}
hp = currhpos & (copi2 & 0xFE);
if (!(vp > vcmp)) {
while (hp < hcmp) {
currhpos++;
if (currhpos > maxhpos) {
/* Now, what? There might be a good position on the
* next line. But it can also be the FFFF FFFE
* case.
*/
currhpos = 0;
currvpos++;
vp = currvpos & (((copi2 >> 8) & 0x7F) | 0x80);
goto try_again;
}
coptime++;
hp = currhpos & (copi2 & 0xFE);
}
}
if (coptime == 0) /* waiting for the blitter */
return 1;
return coptime;
}
static void copper_read(void)
{
if (dmaen(DMA_COPPER)){
copi1 = chipmem_bank.wget(coplc);
copi2 = chipmem_bank.wget(coplc+2);
coplc += 4;
eventtab[ev_copper].oldcycles = cycles;
eventtab[ev_copper].evtime = (copi1 & 1) ? (copi2 & 1) ? 4 : 6 : 4;
copstate = (copi1 & 1) ? (copi2 & 1) ? COP_skip : COP_wait : COP_move;
} else {
copstate = COP_read;
eventtab[ev_copper].active = false;
}
}
static void do_copper(void)
{
switch(copstate){
case COP_read:
copper_read();
break;
case COP_move:
if (copi1 >= (copcon & 2 ? 0x40 : 0x80))
custom_bank.wput(copi1,copi2);
copper_read();
break;
case COP_skip:
if (copcomp())
coplc += 4;
copper_read();
break;
case COP_wait: {
int coptime = calc_copcomp_true(vpos, current_hpos());
if (coptime < 0) {
copstate = COP_stop;
eventtab[ev_copper].active = false;
copper_active = false;
} else {
if (!coptime)
copper_read();
else {
eventtab[ev_copper].evtime = coptime;
eventtab[ev_copper].oldcycles = cycles;
}
}
break;
}
case COP_stop:
eventtab[ev_copper].active = false;
copper_active = false;
break;
}
}
static __inline__ bool blitter_read(void)
{
if (bltcon0 & 0xe00){
if (!dmaen(DMA_BLITTER)) return true; /* blitter stopped */
if (!blitline){
if (bltcon0 & 0x800) bltadat = chipmem_bank.wget(bltapt);
if (bltcon0 & 0x400) bltbdat = chipmem_bank.wget(bltbpt);
}
if (bltcon0 & 0x200) bltcdat = chipmem_bank.wget(bltcpt);
}
bltstate = BLT_work;
return (bltcon0 & 0xE00) != 0;
}
static __inline__ bool blitter_write(void)
{
if (bltddat) blitzero = false;
if ((bltcon0 & 0x100) || blitline){
if (!dmaen(DMA_BLITTER)) return true;
chipmem_bank.wput(bltdpt,bltddat);
}
bltstate = BLT_next;
return (bltcon0 & 0x100) != 0;
}
static void blitter_blit(void)
{
UWORD blitahold,blitbhold,blitchold;
UWORD bltaold;
if (blitdesc) {
UWORD bltamask = 0xffff;
if (!blitlpos) { bltamask &= bltafwm; }
if (blitlpos == (hblitsize - 1)) { bltamask &= bltalwm; }
bltaold = bltadat & bltamask;
blitahold = (((ULONG)bltaold << 16) | blitpreva) >> (16-blitashift);
blitbhold = (((ULONG)bltbdat << 16) | blitprevb) >> (16-blitbshift);
blitchold = bltcdat;
} else {
UWORD bltamask = 0xffff;
if (!blitlpos) { bltamask &= bltafwm; }
if (blitlpos == (hblitsize - 1)) { bltamask &= bltalwm; }
bltaold = bltadat & bltamask;
blitahold = (((ULONG)blitpreva << 16) | bltaold) >> blitashift;
blitbhold = (((ULONG)blitprevb << 16) | bltbdat) >> blitbshift;
blitchold = bltcdat;
}
bltddat = 0;
bltddat = blit_func(blitahold, blitbhold, blitchold, bltcon0 & 0xFF);
if (blitfill){
UWORD fillmask;
for (fillmask = 1; fillmask; fillmask <<= 1){
UWORD tmp = bltddat;
if (blitfc) {
if (blitife)
bltddat |= fillmask;
else
bltddat ^= fillmask;
}
if (tmp & fillmask) blitfc = !blitfc;
}
}
bltstate = BLT_write;
blitpreva = bltaold; blitprevb = bltbdat;
}
static void blitter_nxblit(void)
{
bltstate = BLT_read;
if (blitdesc){
if (++blitlpos == hblitsize) {
if (--vblitsize == 0) {
bltstate = BLT_done;
#ifdef NO_FAST_BLITTER
custom_bank.wput(0xDFF09C,0x8040);
#endif
}
blitfc = bltcon1 & 0x4;
blitlpos = 0;
if (bltcon0 & 0x800) bltapt -= 2+bltamod;
if (bltcon0 & 0x400) bltbpt -= 2+bltbmod;
if (bltcon0 & 0x200) bltcpt -= 2+bltcmod;
if (bltcon0 & 0x100) bltdpt -= 2+bltdmod;
} else {
if (bltcon0 & 0x800) bltapt -= 2;
if (bltcon0 & 0x400) bltbpt -= 2;
if (bltcon0 & 0x200) bltcpt -= 2;
if (bltcon0 & 0x100) bltdpt -= 2;
}
} else {
if (++blitlpos == hblitsize) {
if (--vblitsize == 0) {
bltstate = BLT_done;
#ifdef NO_FAST_BLITTER
custom_bank.wput(0xDFF09C,0x8040);
#endif
}
blitlpos = 0;
if (bltcon0 & 0x800) bltapt += 2+bltamod;
if (bltcon0 & 0x400) bltbpt += 2+bltbmod;
if (bltcon0 & 0x200) bltcpt += 2+bltcmod;
if (bltcon0 & 0x100) bltdpt += 2+bltdmod;
} else {
if (bltcon0 & 0x800) bltapt += 2;
if (bltcon0 & 0x400) bltbpt += 2;
if (bltcon0 & 0x200) bltcpt += 2;
if (bltcon0 & 0x100) bltdpt += 2;
}
}
}
static __inline__ void blitter_line_incx(int a)
{
blinea >>= 1;
if (!blinea) {
blinea = 0x8000;
bltcnxlpt += 2;
bltdnxlpt += 2;
}
}
static __inline__ void blitter_line_decx(int shm)
{
if (shm) blineb = (blineb << 2) | (blineb >> 14);
blinea <<= 1;
if (!blinea) {
blinea = 1;
bltcnxlpt -= 2;
bltdnxlpt -= 2;
}
}
static __inline__ void blitter_line_decy(int shm)
{
if (shm) blineb = (blineb >> 1) | (blineb << 15);
bltcnxlpt -= bltcmod;
bltdnxlpt -= bltcmod; /* ??? am I wrong or doesn't KS1.3 set bltdmod? */
blitonedot = 0;
}
static __inline__ void blitter_line_incy(int shm)
{
if (shm) blineb = (blineb >> 1) | (blineb << 15);
bltcnxlpt += bltcmod;
bltdnxlpt += bltcmod; /* ??? */
blitonedot = 0;
}
static void blitter_line(void)
{
UWORD blitahold = blinea, blitbhold = blineb, blitchold = bltcdat;
bltddat = 0;
if (blitsing && blitonedot) blitahold = 0;
blitonedot = 1;
bltddat = blit_func(blitahold, blitbhold, blitchold, bltcon0 & 0xFF);
if (!blitsign){
bltapt += (WORD)bltamod;
if (bltcon1 & 0x10){
if (bltcon1 & 0x8)
blitter_line_decy(0);
else
blitter_line_incy(0);
} else {
if (bltcon1 & 0x8)
blitter_line_decx(0);
else
blitter_line_incx(0);
}
} else {
bltapt += (WORD)bltbmod;
}
if (bltcon1 & 0x10){
if (bltcon1 & 0x4)
blitter_line_decx(1);
else
blitter_line_incx(1);
} else {
if (bltcon1 & 0x4)
blitter_line_decy(1);
else
blitter_line_incy(1);
}
blitsign = 0 > (WORD)bltapt;
bltstate = BLT_write;
}
static __inline__ void blitter_nxline(void)
{
if (--vblitsize == 0) {
bltstate = BLT_done;
#ifdef NO_FAST_BLITTER
custom_bank.wput(0xDFF09C,0x8040);
#endif
} else {
bltstate = BLT_read;
bltcpt = bltcnxlpt;
bltdpt = bltdnxlpt;
}
}
static void blit_init(void)
{
vblitsize = bltsize >> 6;
hblitsize = bltsize & 0x3F;
if (!vblitsize) vblitsize = 1024;
if (!hblitsize) hblitsize = 64;
blitlpos = 0;
blitzero = true; blitpreva = blitprevb = 0;
blitline = bltcon1 & 1;
blitashift = bltcon0 >> 12; blitbshift = bltcon1 >> 12;
if (blitline) {
bltcnxlpt = bltcpt;
bltdnxlpt = bltdpt;
blitsing = bltcon1 & 0x2;
blinea = bltadat >> blitashift;
blineb = (bltbdat >> blitbshift) | (bltbdat << (16-blitbshift));
blitsign = bltcon1 & 0x40;
blitonedot = false;
bltamod &= 0xfffe; bltbmod &= 0xfffe; bltapt &= 0xfffe;
} else {
blitfc = bltcon1 & 0x4;
blitife = bltcon1 & 0x8;
blitfill = bltcon1 & 0x18;
if ((bltcon1 & 0x18) == 0x18) {
/* Digital "Trash" demo does this; others too. Apparently, no
* negative effects. */
static bool warn = true;
if (warn)
fprintf(stderr, "warning: weird fill mode (further messages suppressed)\n");
warn = false;
}
blitdesc = bltcon1 & 0x2;
if (blitfill && !blitdesc)
fprintf(stderr, "warning: blitter fill without desc\n");
}
}
#ifdef DEFERRED_INT
static UWORD deferred_bits;
static void defer_int_handler(void)
{
INTREQ(0x8000 | deferred_bits);
deferred_bits = 0;
eventtab[ev_deferint].active = false;
}
#endif
void do_blitter(void)
{
#ifdef NO_FAST_BLITTER
/* I'm not sure all this bltstate stuff is really necessary.
* Most programs should be OK if the blit is done as soon as BLTSIZE is
* written to, and the BLTFINISH bit is set some time after that.
* This code here is nowhere near exact.
*/
do {
switch(bltstate) {
case BLT_init:
blit_init();
bltstate = BLT_read;
/* fall through */
case BLT_read:
if (blitter_read())
break;
/* fall through */
case BLT_work:
if (blitline)
blitter_line();
else
blitter_blit();
/* fall through */
case BLT_write:
if (blitter_write())
break;
/* fall through */
case BLT_next:
if (blitline)
blitter_nxline();
else
blitter_nxblit();
break;
case BLT_done:
specialflags &= ~SPCFLAG_BLIT;
break;
}
} while(bltstate != BLT_done && dmaen(DMA_BLITTER)
&& dmaen(DMA_BLITPRI)); /* blitter nasty -> no time for CPU */
#else
if (bltstate == BLT_init) {
blit_init();
bltstate = BLT_read;
}
if (!dmaen(DMA_BLITTER))
return; /* gotta come back later. */
if (blitline) {
do {
blitter_read();
blitter_line();
blitter_write();
blitter_nxline();
} while (bltstate != BLT_done);
} else {
do {
blitter_read();
blitter_blit();
blitter_write();
blitter_nxblit();
} while (bltstate != BLT_done);
}
eventtab[ev_deferint].active = true;
eventtab[ev_deferint].oldcycles = cycles;
eventtab[ev_deferint].evtime = 10; /* whatever */
deferred_bits |= 0x40;
events_schedule();
specialflags &= ~SPCFLAG_BLIT;
#endif
}
void do_disk(void)
{
#ifdef NO_FAST_FLOPPY
if (dskdmaen > 1 && dmaen(0x10)){
if (--dsktime == 0) {
dsktime = dskdelay;
if (dsklen & 0x4000){
UWORD dsksync_check;
DISK_GetData(&dsksync_check, &dskbyte);
dskbyte |= 0x8000;
if (dsksynced || !(adkcon & 0x400)) {
*mfmwrite++ = chipmem_bank.wget(dskpt); dskpt += 2;
if (--dsklength == 0) {
DISK_WriteData();
custom_bank.wput(0xDFF09C, 0x8002); /*INTREQ->DSKBLK */
dskdmaen = 0;
specialflags &= ~SPCFLAG_DISK;
}
}
if (dsksync_check == dsksync) {
custom_bank.wput(0xDFF09C, 0x9000);
dsksynced = true;
}
} else {
DISK_GetData(&dskmfm, &dskbyte);
dskbyte |= 0x8000;
if (dsksynced || !(adkcon & 0x400)){
chipmem_bank.wput(dskpt, dskmfm); dskpt += 2;
if (--dsklength == 0) {
custom_bank.wput(0xDFF09C, 0x8002);
dskdmaen = 0;
specialflags &= ~SPCFLAG_DISK;
}
}
if (dskmfm == dsksync) {
custom_bank.wput(0xDFF09C,0x9000);
dsksynced = true;
}
}
}
}
#else
if (dskdmaen > 1 && dmaen(0x10)){
/* Just don't get into an infinite loop if the code below screws up */
int ntries = 100000;
while (--ntries > 0 && (specialflags & SPCFLAG_DISK)) {
if (dsklen & 0x4000){
UWORD dsksync_check;
DISK_GetData(&dsksync_check, &dskbyte);
dskbyte |= 0x8000;
if (dsksynced || !(adkcon & 0x400)) {
*mfmwrite++ = chipmem_bank.wget(dskpt); dskpt += 2;
if (--dsklength == 0) {
DISK_WriteData();
dskdmaen = 0;
specialflags &= ~SPCFLAG_DISK;
eventtab[ev_deferint].active = true;
eventtab[ev_deferint].oldcycles = cycles;
eventtab[ev_deferint].evtime = 10; /* whatever */
events_schedule ();
deferred_bits |= 0x0002;
}
}
if (dsksync_check == dsksync) {
/* This is pretty pointless... */
custom_bank.wput(0xDFF09C, 0x9000);
dsksynced = true;
}
} else {
DISK_GetData(&dskmfm, &dskbyte);
dskbyte |= 0x8000;
if (dsksynced || !(adkcon & 0x400)){
chipmem_bank.wput(dskpt, dskmfm); dskpt += 2;
if (--dsklength == 0) {
eventtab[ev_deferint].active = true;
eventtab[ev_deferint].oldcycles = cycles;
eventtab[ev_deferint].evtime = 10; /* whatever */
events_schedule ();
deferred_bits |= 0x0002;
dskdmaen = 0;
specialflags &= ~SPCFLAG_DISK;
}
}
if (dskmfm == dsksync) {
/* This is pretty pointless... */
custom_bank.wput(0xDFF09C,0x9000);
dsksynced = true;
}
}
}
}
#endif
}
static __inline__ void pfield_fetchdata(void)
{
if (dmaen(0x100) && pfield_linedmaon) {
switch(bplplanecnt){
case 6:
bpl6dat = chipmem_bank.wget(bpl6pt); bpl6pt += 2; bpl6dat <<= 5;
case 5:
bpl5dat = chipmem_bank.wget(bpl5pt); bpl5pt += 2; bpl5dat <<= 4;
case 4:
bpl4dat = chipmem_bank.wget(bpl4pt); bpl4pt += 2; bpl4dat <<= 3;
case 3:
bpl3dat = chipmem_bank.wget(bpl3pt); bpl3pt += 2; bpl3dat <<= 2;
case 2:
bpl2dat = chipmem_bank.wget(bpl2pt); bpl2pt += 2; bpl2dat <<= 1;
case 1:
bpl1dat = chipmem_bank.wget(bpl1pt); bpl1pt += 2;
}
}
}
static void pfield_hsync(int plfline)
{
}
static void do_sprites(int currvp)
{
int spr;
for(spr = 0; spr < 8; spr++) {
int vstart = (sprpos[spr] >> 8) | ((sprctl[spr] << 6) & 0x100);
int vstop = (sprctl[spr] >> 8) | ((sprctl[spr] << 7) & 0x100);
if ((vstart <= currvp && vstop >= currvp) || spron[spr] == 1) {
if (dmaen(0x20)) {
UWORD data1 = chipmem_bank.wget(sprpt[spr]);
UWORD data2 = chipmem_bank.wget(sprpt[spr]+2);
sprpt[spr] += 4;
if (vstop != currvp && spron[spr] != 1) {
SPRxDATB(data2, spr);
SPRxDATA(data1, spr);
if (!spr && !sprvbfl && ((sprpos[0]&0xff)<<2)>0x60) {
sprvbfl=2;
spr0ctl=sprctl[0];
spr0pos=sprpos[0];
}
} else {
SPRxPOS(data1, spr);
SPRxCTL(data2, spr);
}
#if 0
if (vstop != currvp && !sprptset[spr]) {
SPRxDATB(data2, spr);
SPRxDATA(data1, spr);
if (!spr && !sprvbfl && ((sprpos[0]&0xff)<<2)>0x60) {
sprvbfl=2;
spr0ctl=sprctl[0];
spr0pos=sprpos[0];
}
} else {
SPRxPOS(data1, spr);
SPRxCTL(data2, spr);
sprptset[spr] = false;
}
#endif
}
}
}
}
static void pfield_modulos(void)
{
switch(bplplanecnt){
case 6:
bpl6pt += bpl2mod;
case 5:
bpl5pt += bpl1mod;
case 4:
bpl4pt += bpl2mod;
case 3:
bpl3pt += bpl1mod;
case 2:
bpl2pt += bpl2mod;
case 1:
bpl1pt += bpl1mod;
}
}
static void pfield_linetoscr(int pix, int stoppos)
{
if (bplcon0 & 0x800 && bplplanecnt == 6) {
/* HAM */
static UWORD lastcolor;
while (pix < diwfirstword && pix < stoppos) {
DrawPixel((pix++)-16, acolors[0]);
lastcolor = color_regs[0];
}
while (pix < diwlastword && pix < stoppos) {
int pv = apixels[pix];
switch(pv & 0x30) {
case 0x00: lastcolor = color_regs[pv]; break;
case 0x10: lastcolor &= 0xFF0; lastcolor |= (pv & 0xF); break;
case 0x20: lastcolor &= 0x0FF; lastcolor |= (pv & 0xF) << 8; break;
case 0x30: lastcolor &= 0xF0F; lastcolor |= (pv & 0xF) << 4; break;
}
if (spixstate[pix]) {
DrawPixel(pix-16, acolors[spixels[pix]+16]);
spixels[pix] = spixstate[pix] = 0;
} else {
DrawPixel(pix-16, xcolors[lastcolor]);
}
pix++;
}
while (pix < stoppos) {
DrawPixel((pix++)-16, acolors[0]);
}
} else {
if (bplcon0 & 0x400) {
int *lookup = (bplcon2 & 0x40) ? dblpf_ind2 : dblpf_ind1;
/* Dual playfield */
while (pix < diwfirstword && pix < stoppos) {
DrawPixel((pix++)-16, acolors[0]);
}
while (pix < diwlastword && pix < stoppos) {
if (spixstate[pix]) {
DrawPixel(pix-16, acolors[spixels[pix]+16]);
spixels[pix] = spixstate[pix] = 0;
} else {
DrawPixel(pix-16, acolors[lookup[apixels[pix]]]);
}
pix++;
}
while (pix < stoppos) {
DrawPixel((pix++)-16, acolors[0]);
}
} else {
while (pix < diwfirstword && pix < stoppos) {
DrawPixel((pix++)-16, acolors[0]);
}
while (pix < diwlastword && pix < stoppos) {
if (spixstate[pix]) {
if (apixels[pix] == 0 || spixstate[pix] < plf2pri)
DrawPixel(pix-16, acolors[spixels[pix]+16]);
else
DrawPixel(pix-16, acolors[apixels[pix]]);
spixels[pix] = spixstate[pix] = 0;
} else {
DrawPixel(pix-16, acolors[apixels[pix]]);
}
pix++;
}
while (pix < stoppos) {
DrawPixel((pix++)-16, acolors[0]);
}
}
}
}
static void pfield_sprite (int num, int sprxp, UWORD data, UWORD datb)
{
int i;
for(i = 15; i >= 0; i--) {
int sprxpos = sprxp + i*2;
if ((sprctl[num] & 0x80) && (num & 1)) {
/* Attached sprite */
int col = ((data << 2) & 4) + ((datb << 3) & 8);
if (col) {
spixels[sprxpos] = col;
spixels[sprxpos+1] = col;
spixstate[sprxpos] = 1 << num;
spixstate[sprxpos+1] = 1 << num;
}
spixstate[sprxpos] |= 1 << (num-1);
spixstate[sprxpos+1] |= 1 << (num-1);
} else {
int col = (data & 1) | ((datb << 1) & 2);
if (spixstate[sprxpos] & (1 << num)) {
/* finish attached sprite */
/* Did the upper half of the sprite have any bits set? */
if (spixstate[sprxpos] & (1 << (num+1)))
col += spixels[sprxpos];
if (!col) {
spixstate[sprxpos] = spixstate[sprxpos+1] &= ~(3 << num);
}
} else {
if (col) {
col |= (num & 6) << 1;
}
}
if (col) {
spixels[sprxpos] = col;
spixels[sprxpos+1] = col;
spixstate[sprxpos] = 1<<num;
spixstate[sprxpos+1] = 1<<num;
}
}
data >>= 1;
datb >>= 1;
}
}
void pfield_doline_slow(int currhpos)
{
int xpos = currhpos * 4 - 0x60;
static int nextpos = -1;
static int linepos;
static bool paststop = false;
if (vpos < plffirstline || vpos >= plflastline)
return;
if (currhpos == plfstrt) {
nextpos = currhpos;
linepos = 0;
paststop = false;
}
if (currhpos == nextpos) {
if (linepos >= plflinelen) {
nextpos = -1;
pfield_modulos();
} else {
nextpos += bplhires ? 4 : 8;
linepos += bplhires ? 4 : 8;
pfield_fetchdata();
if (bplhires) {
int offs1 = 2 + xpos + 16 + bpldelay1*2; /* Never trust compilers, kids! */
int offs2 = 2 + xpos + 16 + bpldelay2*2;
int pix;
for(pix = 15; pix >= 0; pix--) {
switch(bplplanecnt) {
case 4:
apixels[pix + offs2] |= bpl4dat & 0x8; bpl4dat >>= 1;
case 3:
apixels[pix + offs1] |= bpl3dat & 0x4; bpl3dat >>= 1;
case 2:
apixels[pix + offs2] |= bpl2dat & 0x2; bpl2dat >>= 1;
case 1:
apixels[pix + offs1] |= bpl1dat & 0x1; bpl1dat >>= 1;
}
}
} else {
int offs1 = 2 + xpos + 32 + bpldelay1*2;
int offs2 = 2 + xpos + 32 + bpldelay2*2;
int pix;
for(pix = 30; pix >= 0; pix -= 2) {
switch(bplplanecnt) {
case 6:
apixels[pix + offs2] |= bpl6dat & 0x20;
apixels[pix + offs2 + 1] |= bpl6dat & 0x20; bpl6dat >>= 1;
case 5:
apixels[pix + offs1] |= bpl5dat & 0x10;
apixels[pix + offs1 + 1] |= bpl5dat & 0x10; bpl5dat >>= 1;
case 4:
apixels[pix + offs2] |= bpl4dat & 0x8;
apixels[pix + offs2 + 1] |= bpl4dat & 0x8; bpl4dat >>= 1;
case 3:
apixels[pix + offs1] |= bpl3dat & 0x4;
apixels[pix + offs1 + 1] |= bpl3dat & 0x4; bpl3dat >>= 1;
case 2:
apixels[pix + offs2] |= bpl2dat & 0x2;
apixels[pix + offs2 + 1] |= bpl2dat & 0x2; bpl2dat >>= 1;
case 1:
apixels[pix + offs1] |= bpl1dat & 0x1;
apixels[pix + offs1 + 1] |= bpl1dat & 0x1; bpl1dat >>= 1;
}
}
}
}
}
if (xpos > 0x60) { /* sprites can't appear that far to the left */
int spr;
for(spr = 7; spr >= 0; spr--) {
if (sprarmed[spr] && xpos == ((sprpos[spr] & 0xFF) * 4) - 0x60) {
int sprxp = xpos + 2 + (sprctl[spr] & 1)*2;
pfield_sprite (spr, sprxp, sprdata[spr], sprdatb[spr]);
}
}
}
if (xpos >= 16 && xpos <= 812) {
pfield_linetoscr (xpos, xpos+4);
}
}
static __inline__ UWORD *pfield_xlateptr(CPTR plpt, int bytecount)
{
if (!chipmem_bank.check(plpt,bytecount)) {
fprintf(stderr, "Warning: Bad playfield pointer\n");
return NULL;
}
return chipmem_bank.xlateaddr(plpt);
}
/*
* A few hand-unrolled loops...
*/
static __inline__ void pfield_orword_hires(UWORD **plfptr,
unsigned char **dataptr, int bit)
{
UWORD data = *(*plfptr)++;
unsigned char *pixptr = *dataptr;
if (data & 0x8000) *pixptr |= bit;
pixptr++;
if (data & 0x4000) *pixptr |= bit;
pixptr++;
if (data & 0x2000) *pixptr |= bit;
pixptr++;
if (data & 0x1000) *pixptr |= bit;
pixptr++;
if (data & 0x800) *pixptr |= bit;
pixptr++;
if (data & 0x400) *pixptr |= bit;
pixptr++;
if (data & 0x200) *pixptr |= bit;
pixptr++;
if (data & 0x100) *pixptr |= bit;
pixptr++;
if (data & 0x80) *pixptr |= bit;
pixptr++;
if (data & 0x40) *pixptr |= bit;
pixptr++;
if (data & 0x20) *pixptr |= bit;
pixptr++;
if (data & 0x10) *pixptr |= bit;
pixptr++;
if (data & 0x8) *pixptr |= bit;
pixptr++;
if (data & 0x4) *pixptr |= bit;
pixptr++;
if (data & 0x2) *pixptr |= bit;
pixptr++;
if (data & 0x1) *pixptr |= bit;
pixptr++;
*dataptr = pixptr;
}
static __inline__ void pfield_orword_lores(UWORD **plfptr,
unsigned char **dataptr, int bit)
{
UWORD data = *(*plfptr)++;
unsigned char *pixptr = *dataptr;
if (data & 0x8000) { *pixptr |= bit; *(pixptr+1) |= bit; }
pixptr+=2;
if (data & 0x4000) { *pixptr |= bit; *(pixptr+1) |= bit; }
pixptr+=2;
if (data & 0x2000) { *pixptr |= bit; *(pixptr+1) |= bit; }
pixptr+=2;
if (data & 0x1000) { *pixptr |= bit; *(pixptr+1) |= bit; }
pixptr+=2;
if (data & 0x800) { *pixptr |= bit; *(pixptr+1) |= bit; }
pixptr+=2;
if (data & 0x400) { *pixptr |= bit; *(pixptr+1) |= bit; }
pixptr+=2;
if (data & 0x200) { *pixptr |= bit; *(pixptr+1) |= bit; }
pixptr+=2;
if (data & 0x100) { *pixptr |= bit; *(pixptr+1) |= bit; }
pixptr+=2;
if (data & 0x80) { *pixptr |= bit; *(pixptr+1) |= bit; }
pixptr+=2;
if (data & 0x40) { *pixptr |= bit; *(pixptr+1) |= bit; }
pixptr+=2;
if (data & 0x20) { *pixptr |= bit; *(pixptr+1) |= bit; }
pixptr+=2;
if (data & 0x10) { *pixptr |= bit; *(pixptr+1) |= bit; }
pixptr+=2;
if (data & 0x8) { *pixptr |= bit; *(pixptr+1) |= bit; }
pixptr+=2;
if (data & 0x4) { *pixptr |= bit; *(pixptr+1) |= bit; }
pixptr+=2;
if (data & 0x2) { *pixptr |= bit; *(pixptr+1) |= bit; }
pixptr+=2;
if (data & 0x1) { *pixptr |= bit; *(pixptr+1) |= bit; }
pixptr+=2;
*dataptr = pixptr;
}
static __inline__ void pfield_setword_hires(UWORD **plfptr,
unsigned char **dataptr, int bit)
{
UWORD data = *(*plfptr)++;
unsigned char *pixptr = *dataptr;
if (data & 0x8000) *pixptr++ = bit;
else *pixptr++ = 0;
if (data & 0x4000) *pixptr++ = bit;
else *pixptr++ = 0;
if (data & 0x2000) *pixptr++ = bit;
else *pixptr++ = 0;
if (data & 0x1000) *pixptr++ = bit;
else *pixptr++ = 0;
if (data & 0x800) *pixptr++ = bit;
else *pixptr++ = 0;
if (data & 0x400) *pixptr++ = bit;
else *pixptr++ = 0;
if (data & 0x200) *pixptr++ = bit;
else *pixptr++ = 0;
if (data & 0x100) *pixptr++ = bit;
else *pixptr++ = 0;
if (data & 0x80) *pixptr++ = bit;
else *pixptr++ = 0;
if (data & 0x40) *pixptr++ = bit;
else *pixptr++ = 0;
if (data & 0x20) *pixptr++ = bit;
else *pixptr++ = 0;
if (data & 0x10) *pixptr++ = bit;
else *pixptr++ = 0;
if (data & 0x8) *pixptr++ = bit;
else *pixptr++ = 0;
if (data & 0x4) *pixptr++ = bit;
else *pixptr++ = 0;
if (data & 0x2) *pixptr++ = bit;
else *pixptr++ = 0;
if (data & 0x1) *pixptr++ = bit;
else *pixptr++ = 0;
*dataptr = pixptr;
}
static __inline__ void pfield_setword_lores(UWORD **plfptr,
unsigned char **dataptr, int bit)
{
UWORD data = *(*plfptr)++;
unsigned char *pixptr = *dataptr;
if (data & 0x8000) { *pixptr++ = bit; *pixptr++ = bit; }
else { *pixptr++ = 0; *pixptr++ = 0; }
if (data & 0x4000) { *pixptr++ = bit; *pixptr++ = bit; }
else { *pixptr++ = 0; *pixptr++ = 0; }
if (data & 0x2000) { *pixptr++ = bit; *pixptr++ = bit; }
else { *pixptr++ = 0; *pixptr++ = 0; }
if (data & 0x1000) { *pixptr++ = bit; *pixptr++ = bit; }
else { *pixptr++ = 0; *pixptr++ = 0; }
if (data & 0x800) { *pixptr++ = bit; *pixptr++ = bit; }
else { *pixptr++ = 0; *pixptr++ = 0; }
if (data & 0x400) { *pixptr++ = bit; *pixptr++ = bit; }
else { *pixptr++ = 0; *pixptr++ = 0; }
if (data & 0x200) { *pixptr++ = bit; *pixptr++ = bit; }
else { *pixptr++ = 0; *pixptr++ = 0; }
if (data & 0x100) { *pixptr++ = bit; *pixptr++ = bit; }
else { *pixptr++ = 0; *pixptr++ = 0; }
if (data & 0x80) { *pixptr++ = bit; *pixptr++ = bit; }
else { *pixptr++ = 0; *pixptr++ = 0; }
if (data & 0x40) { *pixptr++ = bit; *pixptr++ = bit; }
else { *pixptr++ = 0; *pixptr++ = 0; }
if (data & 0x20) { *pixptr++ = bit; *pixptr++ = bit; }
else { *pixptr++ = 0; *pixptr++ = 0; }
if (data & 0x10) { *pixptr++ = bit; *pixptr++ = bit; }
else { *pixptr++ = 0; *pixptr++ = 0; }
if (data & 0x8) { *pixptr++ = bit; *pixptr++ = bit; }
else { *pixptr++ = 0; *pixptr++ = 0; }
if (data & 0x4) { *pixptr++ = bit; *pixptr++ = bit; }
else { *pixptr++ = 0; *pixptr++ = 0; }
if (data & 0x2) { *pixptr++ = bit; *pixptr++ = bit; }
else { *pixptr++ = 0; *pixptr++ = 0; }
if (data & 0x1) { *pixptr++ = bit; *pixptr++ = bit; }
else { *pixptr++ = 0; *pixptr++ = 0; }
*dataptr = pixptr;
}
static void pfield_doline(void)
{
int xpos = plfstrt * 4 - 0x60;
int spr;
int linelen;
if (vpos < plffirstline || vpos >= plflastline)
return;
if (dmaen(0x100) && pfield_linedmaon) {
/*
* We want to use real pointers, but we don't want to get segfaults
* because of them.
*/
UWORD *r_bpl1pt,*r_bpl2pt,*r_bpl3pt,*r_bpl4pt,*r_bpl5pt,*r_bpl6pt;
int bytecount = plflinelen / (bplhires ? 4 : 8) * 2;
switch (bplplanecnt) {
case 6:
r_bpl6pt = pfield_xlateptr(bpl6pt, bytecount);
if (r_bpl6pt == NULL)
return;
case 5:
r_bpl5pt = pfield_xlateptr(bpl5pt, bytecount);
if (r_bpl5pt == NULL)
return;
case 4:
r_bpl4pt = pfield_xlateptr(bpl4pt, bytecount);
if (r_bpl4pt == NULL)
return;
case 3:
r_bpl3pt = pfield_xlateptr(bpl3pt, bytecount);
if (r_bpl3pt == NULL)
return;
case 2:
r_bpl2pt = pfield_xlateptr(bpl2pt, bytecount);
if (r_bpl2pt == NULL)
return;
case 1:
r_bpl1pt = pfield_xlateptr(bpl1pt, bytecount);
if (r_bpl1pt == NULL)
return;
}
switch (bplplanecnt) {
case 6: bpl6pt += bytecount + bpl2mod;
case 5: bpl5pt += bytecount + bpl1mod;
case 4: bpl4pt += bytecount + bpl2mod;
case 3: bpl3pt += bytecount + bpl1mod;
case 2: bpl2pt += bytecount + bpl2mod;
case 1: bpl1pt += bytecount + bpl1mod;
}
if (bplhires) {
int xpos1 = 2 + xpos + 16 + bpldelay1*2;
int xpos2 = 2 + xpos + 16 + bpldelay2*2;
unsigned char *xp1ptr = apixels+xpos1;
unsigned char *xp2ptr = apixels+xpos2;
if (bplplanecnt > 0) {
unsigned char *app = xp1ptr;
for (linelen = plflinelen; linelen > 0; linelen-=4) {
pfield_setword_hires(&r_bpl1pt, &app, 1);
}
if (bplplanecnt > 2) {
unsigned char *app = xp1ptr;
for (linelen = plflinelen; linelen > 0; linelen-=4) {
pfield_orword_hires(&r_bpl3pt, &app, 4);
}
}
if (bplplanecnt > 1) {
unsigned char *app = xp2ptr;
for (linelen = plflinelen; linelen > 0; linelen-=4) {
pfield_orword_hires(&r_bpl2pt, &app, 2);
}
}
if (bplplanecnt > 3) {
unsigned char *app = xp2ptr;
for (linelen = plflinelen; linelen > 0; linelen-=4) {
pfield_orword_hires(&r_bpl4pt, &app, 8);
}
}
} else {
memset(apixels, 0, sizeof(apixels));
}
} else {
int xpos1 = 2 + xpos + 32 + bpldelay1*2;
int xpos2 = 2 + xpos + 32 + bpldelay2*2;
unsigned char *xp1ptr = apixels+xpos1;
unsigned char *xp2ptr = apixels+xpos2;
if (bplplanecnt > 0) {
unsigned char *app = xp1ptr;
for (linelen = plflinelen; linelen > 0; linelen-=8) {
pfield_setword_lores(&r_bpl1pt, &app, 1);
}
if (bplplanecnt > 2) {
unsigned char *app = xp1ptr;
for (linelen = plflinelen; linelen > 0; linelen-=8) {
pfield_orword_lores(&r_bpl3pt, &app, 4);
}
}
if (bplplanecnt > 4) {
unsigned char *app = xp1ptr;
for (linelen = plflinelen; linelen > 0; linelen-=8) {
pfield_orword_lores(&r_bpl5pt, &app, 16);
}
}
if (bplplanecnt > 1) {
unsigned char *app = xp2ptr;
for (linelen = plflinelen; linelen > 0; linelen-=8) {
pfield_orword_lores(&r_bpl2pt, &app, 2);
}
}
if (bplplanecnt > 3) {
unsigned char *app = xp2ptr;
for (linelen = plflinelen; linelen > 0; linelen-=8) {
pfield_orword_lores(&r_bpl4pt, &app, 8);
}
}
if (bplplanecnt > 5) {
unsigned char *app = xp2ptr;
for (linelen = plflinelen; linelen > 0; linelen-=8) {
pfield_orword_lores(&r_bpl6pt, &app, 32);
}
}
} else {
memset(apixels, 0, sizeof(apixels));
}
}
}
for(spr = 7; spr >= 0; spr--) {
if (sprarmed[spr]) {
int sprxp = ((sprpos[spr] & 0xFF) * 4) - 0x60 + 2 + (sprctl[spr] & 1)*2;
int i;
/* Ugh. Nasty bug. Let's rather lose some sprites than trash
* memory. */
if (sprxp < 0)
continue;
pfield_sprite (spr, sprxp, sprdata[spr], sprdatb[spr]);
}
}
pfield_linetoscr (16, 812);
}
static void setdontcare(void)
{
printf("Don't care mouse mode set\n");
mousestate=dont_care_mouse;
lastspr0x=lastmx; lastspr0y=lastmy;
mstepx=defstepx; mstepy=defstepy;
}
static void setfollow(void)
{
printf("Follow sprite mode set\n");
mousestate=follow_mouse;
lastdiffx=lastdiffy=0;
sprvbfl=0;
spr0ctl=spr0pos=0;
mstepx=defstepx; mstepy=defstepy;
}
void togglemouse(void)
{
switch(mousestate) {
case dont_care_mouse: setfollow(); break;
case follow_mouse: setdontcare(); break;
}
}
#if 0 /* Mouse calibrations works well enough without this. */
void mousesetup(void)
{
if (mousestate != follow_mouse) return;
char buf[80];
printf("\nMouse pointer centering.\n\n");
printf("Current values: xoffs=0x%x yoffs=0x%x\n", xoffs, yoffs);
printf("New values (y/n)?";
cin.get(buf,80,'\n');
if (toupper(buf[0]) != 'Y') return;
cout << "\nxoffs= "; cin>>xoffs;
cout << "yoffs= "; cin>>yoffs;
cout << "\n";
}
#endif
static __inline__ int adjust(int val)
{
if (val>127)
return 127;
else if (val<-127)
return -127;
return val;
}
static void vsync_handler(void)
{
int spr0x = ((spr0pos & 0xff) << 2) | ((spr0ctl & 1) << 1);
int spr0y = ((spr0pos >> 8) | ((spr0ctl & 4) << 6)) << 1;
int diffx, diffy;
int i;
handle_events();
#ifdef HAVE_JOYSTICK
{
UWORD dir;
bool button;
read_joystick(&dir, &button);
buttonstate[1] = button;
}
#endif
if (produce_sound)
flush_sound ();
switch (mousestate) {
case normal_mouse:
diffx = lastmx - lastsampledmx;
diffy = lastmy - lastsampledmy;
if (!newmousecounters) {
if (diffx > 127) diffx = 127;
if (diffx < -127) diffx = -127;
joy0x += diffx;
if (diffy > 127) diffy = 127;
if (diffy < -127) diffy = -127;
joy0y += diffy;
}
lastsampledmx += diffx; lastsampledmy += diffy;
break;
case dont_care_mouse:
diffx = adjust (((lastmx-lastspr0x) * mstepx) >> 16);
diffy = adjust (((lastmy-lastspr0y) * mstepy) >> 16);
lastspr0x=lastmx; lastspr0y=lastmy;
joy0x+=diffx; joy0y+=diffy;
break;
case follow_mouse:
if (sprvbfl && sprvbfl-- >1) {
int mouseypos;
if ((lastdiffx > docal || lastdiffx < -docal) && lastspr0x != spr0x
&& spr0x > plfstrt*4+34+xcaloff && spr0x < plfstop*4-xcaloff)
{
int val = (lastdiffx << 16) / (spr0x - lastspr0x);
if (val>=0x8000) mstepx=(mstepx*(calweight-1)+val)/calweight;
}
if ((lastdiffy > docal || lastdiffy < -docal) && lastspr0y != spr0y
&& spr0y>plffirstline+ycaloff && spr0y<plflastline-ycaloff)
{
int val = (lastdiffy<<16) / (spr0y-lastspr0y);
if (val>=0x8000) mstepy=(mstepy*(calweight-1)+val)/calweight;
}
mouseypos = lastmy;
/* Calculations might be incorrect */
if(dont_want_aspect)
mouseypos *= 2;
/* cout<<" mstepx= "<<mstepx<<" mstepy= "<<mstepy<<"\n";*/
diffx = adjust ((((lastmx + 0x70 + xoffs - spr0x) & ~1) * mstepx) >> 16);
diffy = adjust ((((mouseypos + yoffs - spr0y+minfirstline*2) & ~1) * mstepy) >> 16);
lastspr0x=spr0x; lastspr0y=spr0y;
lastdiffx=diffx; lastdiffy=diffy;
joy0x+=diffx; joy0y+=diffy;
}
break;
}
INTREQ(0x8020);
if (bplcon0 & 4) lof ^= 0x8000;
COPJMP1(0);
for (i = 0; i < 8; i++)
spron[i] = 0;
if (framecnt == 0)
flush_screen ();
count_frame();
#ifdef __unix
{
struct timeval tv;
unsigned long int newtime;
gettimeofday(&tv,NULL);
newtime = (tv.tv_sec-seconds_base) * 1000 + tv.tv_usec / 1000;
if (!bogusframe) {
frametime += newtime - msecs;
timeframes++;
}
msecs = newtime;
bogusframe = false;
}
#endif
CIA_vsync_handler();
}
static void hsync_handler(void)
{
eventtab[ev_hsync].oldcycles = cycles;
CIA_hsync_handler();
if(produce_sound)
do_sound ();
if (framecnt == 0 && vpos >= plffirstline && vpos < plflastline
&& vpos >= minfirstline)
{
/* Finish the line, if we started doing it with the slow update.
* Otherwise, draw it entirely. */
if (pfield_fullline) {
if (!pfield_linedone) {
pfield_doline();
}
} else {
int i;
for(i = pfield_lastpart_hpos; i < maxhpos; i++)
pfield_doline_slow(i);
}
flush_line ();
}
pfield_calclinedma();
pfield_fullline = true;
pfield_linedone = false;
pfield_lastpart_hpos = 0;
if (++vpos == (maxvpos + (lof != 0))) {
vpos = 0;
vsync_handler();
}
/* Tell the graphics code about the next line. */
if (framecnt == 0 && vpos >= plffirstline && vpos < plflastline
&& vpos >= minfirstline)
{
if (dont_want_aspect) {
prepare_line(vpos - minfirstline, false);
} else {
if (bplcon0 & 4) {
if(lof) {
prepare_line((vpos-minfirstline)*2, false);
} else {
prepare_line((vpos-minfirstline)*2+1, false);
}
} else {
prepare_line((vpos-minfirstline)*2, true);
}
}
}
/* do_sprites must be called after pfield_lastpart_hpos
* is set to 0. */
if (vpos > 0) do_sprites(vpos);
}
void customreset(void)
{
int i;
#ifdef __unix
struct timeval tv;
#endif
inhibit_frame = 0;
CIA_reset();
cycles = 0; specialflags = 0;
vpos = 0; lof = 0;
if (needmousehack()) {
if (mousestate != follow_mouse) setfollow();
} else {
mousestate = normal_mouse;
}
memset(spixels, 0, sizeof(spixels));
memset(spixstate, 0, sizeof(spixstate));
prepare_line(0, false); /* Get the graphics stuff in a sane state */
dmacon = intena = 0;
bltstate = BLT_done;
copstate = COP_stop;
copcon = 0;
dskdmaen = 0;
cycles = 0;
for(i = ev_copper; i < ev_max; i++) {
eventtab[i].active = false;
eventtab[i].oldcycles = 0;
}
copper_active = false;
eventtab[ev_cia].handler = CIA_handler;
eventtab[ev_copper].handler = do_copper;
eventtab[ev_hsync].handler = hsync_handler;
eventtab[ev_hsync].evtime = maxhpos;
eventtab[ev_hsync].active = true;
#ifdef DEFERRED_INT
eventtab[ev_deferint].handler = defer_int_handler;
eventtab[ev_deferint].active = false;
deferred_bits = 0;
#endif
events_schedule();
#ifdef __unix
gettimeofday(&tv,NULL);
seconds_base = tv.tv_sec;
bogusframe = true;
#endif
}
void dumpcustom(void)
{
printf("DMACON: %x INTENA: %x INTREQ: %x VPOS: %x HPOS: %x\n", DMACONR(),
intena, intreq, vpos, current_hpos());
if (timeframes) {
printf("Average frame time: %d ms [frames: %d time: %d]\n",
frametime/timeframes, timeframes, frametime);
}
}
int intlev(void)
{
UWORD imask = intreq & intena;
if (imask && (intena & 0x4000)){
if (imask & 0x2000) return 6;
if (imask & 0x1800) return 5;
if (imask & 0x0780) return 4;
if (imask & 0x0070) return 3;
if (imask & 0x0008) return 2;
if (imask & 0x0007) return 1;
}
return -1;
}
void custom_init(void)
{
int num;
setfollow();
customreset();
for (num = 0; num < 64; num++) {
int plane1 = (num & 1) | ((num >> 1) & 2) | ((num >> 2) & 4);
int plane2 = ((num >> 1) & 1) | ((num >> 2) & 2) | ((num >> 3) & 4);
if (plane2 > 0) plane2 += 8;
dblpf_ind1[num] = plane1 == 0 ? plane2 : plane1;
dblpf_ind2[num] = plane2 == 0 ? plane1 : plane2;
}
}