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PatchNTSC
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PatchNTSC.asm
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Assembly Source File
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1990-04-15
|
2KB
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137 lines
*
* PatchNTSC.asm
*
* Patches "OpenScreen()" so that Screens higher than 216
* will have the "ViewMode->Interlace"-Flag set
*
* Allows NTSC-Users to use PAL programs without loosing the
* bottom of screen
*
* © 1990 by Oliver Wagner
* Landsberge 5
* 4322 Sprockhövel
* West Germany
*
* Freely distributable IF no charge is made for anything!
* Darf nicht von Mitgliedern der "Schwarzen Liste" der PD-Vertreiber
* (erstellt durch die AmigaUserGroupSwitzerland AUGS) genutzt/verbreitet
* werden!
*
* A68k PatchNTSC.asm
* BLINK PatchNTSC.asm,lib:small.lib to PatchNTSC
*
call MACRO
xref _LVO\1
jsr _LVO\1(a6)
ENDM
jump MACRO
xref _LVO\1
jmp _LVO\1(a6)
ENDM
CODE
move.l 4,a6
move.l $114(a6),a0
moveq #0,d7
tst.l $ac(a0)
bne.s fromcli
lea $5c(a0),a0
call WaitPort
call GetMsg
move.l d0,d7
fromcli:
lea dosname(pc),a1
call OldOpenLibrary
move.l d0,d6
lea intname(pc),a1
call OldOpenLibrary
move.l d0,a5
move.l -196(a5),a3
cmp.l #'Olli',20(a3)
bne.s install
* remove patch
move.l a3,a1
move.l 16(a1),-196(a5)
moveq #24,d0
call FreeMem
lea remmsg(pc),a4
exit:
move.l d6,a6
tst.l d7
bne.s fromwb
call Output
bra.s writeit
fromwb:
lea winddef(pc),a0
move.l a0,d1
move.l #1005,d2
call Open
move.l d0,d4
beq.s nowrite
writeit:
moveq #-1,d3
move.l a4,d2
move.l d0,d1
len:
addq.l #1,d3
tst.b (a4)+
bne.s len
call Write
tst.l d7
beq.s nowrite
moveq #127,d1
call Delay
move.l d4,d1
call Close
nowrite:
move.l 4,a6
tst.l d7
bne.s replywb
moveq #0,d0
rts
replywb:
move.l d7,a1
jump ReplyMsg
install:
lea insmsg(pc),a4
moveq #0,d1
moveq #24,d0
call AllocMem
move.l d0,d4
lea old+2(pc),a0
move.l a3,(a0)
lea newopen(pc),a0
move.l d0,a1
moveq #5,d0
copy:
move.l (a0)+,(a1)+
dbf d0,copy
move.l d4,-196(a5)
bra.s exit
newopen:
cmp.w #216,6(a0)
ble.s old
or.w #4,12(a0)
old:
jmp $f000000
dc.l 'Olli'
dosname:
dc.b "dos.library",0
intname:
dc.b "intuition.library",0
remmsg:
dc.b 10,$9b,"33;1m PatchNTSC ",$9b,"0;1m removed!",10,10,0
insmsg:
dc.b 10,$9b,"33;1m PatchNTSC ",$9b,"0;1m installed!",10
dc.b " © 1990 by Oliver Wagner / Ultimate Computer Arts",10
dc.b $9b,"0m 'OpenScreen()' patched for Height >216",10,10,0
winddef:
dc.b "con:30/40/420/61/PatchNTSC",0
END