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Amiga Game-Power
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Amiga Game-Power.iso
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pd mix ii
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misc.asm
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Assembly Source File
|
1994-05-20
|
1KB
|
56 lines
;
; copy_sector(from,to)
; ULONG *from,*to;
;
; Copies 128 words (512 bytes) of memory
;
XDEF _copy_sector
_copy_sector:
move.l 4(sp),a0
move.l 8(sp),a1
move.w #128,d0
loop
move.l (a0)+,(a1)+
subq.w #1,d0
bne loop
rts
;
; Dummy segment list for subprocess
;
XDEF _proc_seg_list
XREF _subprocess
cnop 0,4 ; long word allign
dc.l 16 ; segment length - any number will do
_proc_seg_list
dc.l 0 ; next segment
jmp _subprocess
;
; Routines used by wd.c to read and write sectors.
;
XDEF _rdsec
XDEF _wrsec
_rdsec ; rdsec(buf,&WD->data,size)
move.l 4(sp),a0 ; buf
move.l 8(sp),a1 ; controller data register
move.l 12(sp),d0 ; bytes to transfer
rdsec2
move.b (a1),(a0)+ ; read byte into buffer
subq.l #1,d0 ; subtract 1
bne rdsec2 ; loop till all bytes read
rts
_wrsec ; wrsec(buf,&WD->data,size)
move.l 4(sp),a0 ; buf
move.l 8(sp),a1 ; controller data register
move.l 12(sp),d0 ; bytes to transfer
wrsec2
move.b (a0)+,(a1) ; write byte to controller
subq.l #1,d0 ; subtract 1
bne wrsec2 ; loop till all bytes written
rts