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EnigmA Amiga Run 1997 February
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EnigmA AMIGA RUN 15 (1997)(G.R. Edizioni)(IT)[!][issue 1997-02][PLANET CD V].iso
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enigma
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earcd
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varie
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uae-0_64.lha
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uae-0.6.4
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src
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hardfile.c
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C/C++ Source or Header
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1996-08-18
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6KB
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260 lines
/*
* UAE - The Un*x Amiga Emulator
*
* AutoConfig devices
*
* (c) 1995 Bernd Schmidt
*/
#include "sysconfig.h"
#include "sysdeps.h"
#include "config.h"
#include "options.h"
#include "memory.h"
#include "custom.h"
#include "newcpu.h"
#include "disk.h"
#include "xwin.h"
#include "autoconf.h"
static int opencount = 0;
static int uaedevfd;
int numtracks = 512;
static ULONG hardfile_init(void)
{
ULONG tmp1, devicenode, bootnode;
int have36 = 1;
ULONG retval = regs.d[0];
filesys_init();
return retval;
}
static ULONG hardfile_open(void)
{
CPTR tmp1 = regs.a[1]; /* IOReq */
/* Check unit number */
if (regs.d[0] == 0) {
opencount++;
put_word (regs.a[6]+32, get_word (regs.a[6]+32) + 1);
put_long (tmp1+24, 0); /* io_Unit */
put_byte (tmp1+31, 0); /* io_Error */
put_byte (tmp1+8, 7); /* ln_type = NT_REPLYMSG */
return 0;
}
put_long (tmp1+20, (ULONG)-1);
put_byte (tmp1+31, (UBYTE)-1);
return (ULONG)-1;
}
static ULONG hardfile_close(void)
{
opencount--;
put_word (regs.a[6]+32, get_word (regs.a[6]+32) - 1);
return regs.d[0];
}
static ULONG hardfile_expunge(void)
{
return 0; /* Simply ignore this one... */
}
static ULONG hardfile_beginio(void)
{
ULONG tmp1, tmp2, dataptr, offset;
ULONG retval = regs.d[0];
tmp1 = regs.a[1];
put_byte (tmp1+8, 5); /* set ln_type to NT_MESSAGE */
put_byte (tmp1+31, 0); /* no error yet */
tmp2 = get_word (tmp1+28); /* io_Command */
switch (tmp2) {
case 2: /* Read */
dataptr = get_long (tmp1 + 40);
if (dataptr & 1)
goto bad_command;
offset = get_long (tmp1 + 44);
if (offset & 511)
goto bad_command;
tmp2 = get_long (tmp1 + 36); /* io_Length */
if (tmp2 & 511)
goto bad_command;
if (tmp2 + offset > (ULONG)numtracks * 32 * 512)
goto bad_command;
put_long (tmp1 + 32, tmp2); /* set io_Actual */
lseek (uaedevfd, offset, SEEK_SET);
while (tmp2) {
int i;
char buffer[512];
read (uaedevfd, buffer, 512);
for (i = 0; i < 512; i++, dataptr++)
put_byte(dataptr, buffer[i]);
tmp2 -= 512;
}
break;
case 3: /* Write */
case 11: /* Format */
dataptr = get_long (tmp1 + 40);
if (dataptr & 1)
goto bad_command;
offset = get_long (tmp1 + 44);
if (offset & 511)
goto bad_command;
tmp2 = get_long (tmp1 + 36); /* io_Length */
if (tmp2 & 511)
goto bad_command;
if (tmp2 + offset > (ULONG)numtracks * 32 * 512)
goto bad_command;
put_long (tmp1 + 32, tmp2); /* set io_Actual */
lseek (uaedevfd, offset, SEEK_SET);
while (tmp2) {
char buffer[512];
int i;
for (i=0; i < 512; i++, dataptr++)
buffer[i] = get_byte(dataptr);
write (uaedevfd, buffer, 512);
tmp2 -= 512;
}
break;
bad_command:
break;
case 18: /* GetDriveType */
put_long (tmp1 + 32, 1); /* not exactly a 3.5" drive, but... */
break;
case 19: /* GetNumTracks */
put_long (tmp1 + 32, numtracks);
break;
/* Some commands that just do nothing and return zero */
case 4: /* Update */
case 5: /* Clear */
case 9: /* Motor */
case 10: /* Seek */
case 12: /* Remove */
case 13: /* ChangeNum */
case 14: /* ChangeStatus */
case 15: /* ProtStatus */
case 20: /* AddChangeInt */
case 21: /* RemChangeInt */
put_long (tmp1+32, 0); /* io_Actual */
retval = 0;
break;
default:
/* Command not understood. */
put_byte (tmp1+31, (UBYTE)-3); /* io_Error */
retval = 0;
break;
}
if ((get_byte (tmp1+30) & 1) == 0) {
/* Not IOF_QUICK -- need to ReplyMsg */
regs.a[1] = tmp1;
CallLib (get_long(4), -378);
}
return retval;
}
static ULONG hardfile_abortio(void)
{
return (ULONG)-3;
}
void hardfile_install(void)
{
ULONG functable, datatable, inittable;
ULONG initcode, openfunc, closefunc, expungefunc;
ULONG nullfunc, beginiofunc, abortiofunc;
uaedevfd = open ("hardfile", O_RDWR | O_BINARY);
ROM_hardfile_resname = ds("hardfile.device");
ROM_hardfile_resid = ds("UAE hardfile.device 0.2");
numtracks = hardfile_size / 16384;
/* initcode */
initcode = here();
calltrap(deftrap(hardfile_init)); dw(RTS);
/* Open */
openfunc = here();
calltrap(deftrap(hardfile_open)); dw(RTS);
/* Close */
closefunc = here();
calltrap(deftrap(hardfile_close)); dw(RTS);
/* Expunge */
expungefunc = here();
calltrap(deftrap(hardfile_expunge)); dw(RTS);
/* Null */
nullfunc = here();
dw(0x7000); /* return 0; */
dw(RTS);
/* BeginIO */
beginiofunc = here();
calltrap(deftrap(hardfile_beginio)); dw(RTS);
/* AbortIO */
abortiofunc = here();
calltrap(deftrap(hardfile_abortio)); dw(RTS);
/* FuncTable */
functable = here();
dl(openfunc); /* Open */
dl(closefunc); /* Close */
dl(expungefunc); /* Expunge */
dl(nullfunc); /* Null */
dl(beginiofunc); /* BeginIO */
dl(abortiofunc); /* AbortIO */
dl(0xFFFFFFFF); /* end of table */
/* DataTable */
datatable = here();
dw(0xE000); /* INITBYTE */
dw(0x0008); /* LN_TYPE */
dw(0x0300); /* NT_DEVICE */
dw(0xC000); /* INITLONG */
dw(0x000A); /* LN_NAME */
dl(ROM_hardfile_resname);
dw(0xE000); /* INITBYTE */
dw(0x000E); /* LIB_FLAGS */
dw(0x0600); /* LIBF_SUMUSED | LIBF_CHANGED */
dw(0xD000); /* INITWORD */
dw(0x0014); /* LIB_VERSION */
dw(0x0004); /* 0.4 */
dw(0xD000);
dw(0x0016); /* LIB_REVISION */
dw(0x0000);
dw(0xC000);
dw(0x0018); /* LIB_IDSTRING */
dl(ROM_hardfile_resid);
dw(0x0000); /* end of table */
ROM_hardfile_init = here();
dl(0x00000100); /* ??? */
dl(functable);
dl(datatable);
dl(initcode);
if (uaedevfd >= 0) {
CPTR initfunc;
add_filesys_unit(NULL, "hardfile", 1);
}
}