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Compendium Deluxe 2
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DiskChangeRunner.s
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1993-08-20
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; This routine shows how to use the diskchange prog, you call with
; d0 = drive to check, note: this routine doesnt hang if u specify a
; non-existen drive, nor if there is no disk, it will return with
; d0 = 0 if a disk is found, or d0 = -1 if there isn't a disk in the drive..
;
; this routine shows a grey screen for no-disk, and white for drive with disk
;
Opt c-
Section "Disk-in-drive check Example",Code_c
IncDir Df1:
Start Movem.l d0-d7/a0-a6,-(sp)
Bsr KillSys
Lea CopperList(pc),a0
Lea HardWare,a6
Move.l a0,Cop1Lc(a6)
Move.w #$83c0,DMACon(a6)
CheckLoop Moveq #1,d0 ; Check Drive 1 for a disk
Bsr DiskChange+$20 ; Do the Check
Tst.l d0 ; If d0=0 then disk founmd
Beq DiskFound ; Do found routine
NoDiskInDrive Move.w #$333,$Dff180 ; d0=-1 if no disk in drive
Bra CheckNext ;
DiskFound Move.w #$fff,$Dff180 ; Disk found = White Screen
CheckNext Move.w #40,d7 ;
WaitLoop Move.l #$05000,d1 ; Quick pause between next
Bsr WaitVBL ; disk check
Bsr DoWaitVBL ;
Dbf d7,WaitLoop ;
Btst #6,$Bfe001 ; Test the mouse, quit if
Bne CheckLoop ; Pressed...
Bsr ReturnSys
Movem.l (sp)+,d0-d7/a0-a6
Moveq #0,d0
Rts
KillSys Bsr.s SysWait
Move.l $4,a6
Lea GFXName(pc),a1
Moveq #0,d0
Jsr -552(a6)
Lea OldCop1(pc),a5
Move.l $26(a0),$0(a5)
Move.l $32(a0),$4(a5)
Lea HardWare,a6
Move.w IntEnaR(a6),d0
Move.w DMAConR(a6),d1
Or.w #$8000,d0
And.w #$03ff,d1
Or.w #$8000,d1
Move.w d0,$8(a5)
Move.w d1,$a(a5)
Move.w #$7fff,IntEna(a6)
Move.w #$7fff,DMACon(a6)
Rts
SysWait Move.w #15,d7
SysWaitLoop Move.l #$05000,d1
Bsr.s WaitVBL
Bsr.s DoWaitVBL
Dbf d7,SysWaitLoop
Rts
DoWaitVBL Move.l #$03000,d1
WaitVBL Movem.l d0-d1/a6,-(sp)
Lea HardWare,a6
WaitVBLLoop Move.l VPosR(a6),d0
And.l #$1ff00,d0
Cmp.l d1,d0
Bne.s WaitVBLLoop
Movem.l (sp)+,d0-d1/a6
Rts
ReturnSys Lea HardWare,a6
Move.w OldIntEna(pc),IntEna(a6)
Move.w OldDMACon(pc),DMACon(a6)
Move.l OldCop1(pc),Cop1lc(a6)
Move.l OldCop2(pc),Cop2lc(a6)
Rts
GFXName Dc.b "graphics.library",0
Even
OldCop1 Dc.l 0
OldCop2 Dc.l 0
OldIntEna Dc.w 0
OldDmaCon Dc.w 0
Screen Dc.l $c0000
Cmv Macro
Dc.w \2,\1
EndM
Cwt Macro
Dc.w (\1*$100)+$01,$fffe
EndM
Pal Macro
Dc.w $ffe1,$fffe
EndM
EndCop Macro
Dc.w $ffff,$fffe
EndM
CopperList Cwt $15
Cmv $0200,BplCon0
Cmv $00bb,BplCon1
Cmv $000a,BplCon2
Cmv $0034,DdfStrt
Cmv $00c8,DdfStop
Cmv $1681,DiwStrt
Cmv $36c1,DiwStop
Cmv $0,BplMod1
Cmv $0,BplMod2
CopperCols Cwt $25
Cmv $0,Color01
Cwt $28
Cmv $200,BplCon0
EndCop
DiskChange Incbin CodeSegments/DiskChange-Seg
****Custom Chip Registers****
Hardware = $Dff000
;Control Registers
Dmaconr = $002
Vposr = $004
Vhposr = $006
Joy0dat = $00A
Joy1dat = $00C
Clxdat = $00E
Intenar = $01C
Intereqr = $01E
Copcon = $02E
;Blitter Registers
Bltcon0 = $040
Bltcon1 = $042
Bltafwm = $044
Bltalwm = $046
Bltcpth = $048
Bltcptl = $04A
Bltbpth = $04C
Bltbptl = $04E
Bltapth = $050
Bltaptl = $052
Bltdpth = $054
Bltdptl = $056
Bltsize = $058
Bltcmod = $060
Bltbmod = $062
Bltamod = $064
Bltdmod = $066
Bltcdat = $070
Bltbdat = $072
Bltadat = $074
;Copper Registers
Cop1lc = $080
Cop1lch = $080
Cop1lcl = $082
Cop2lc = $084
Cop2lch = $084
Cop2lcl = $086
Copjmp1 = $088
Copjmp2 = $08A
Diwstrt = $08E
Diwstop = $090
Ddfstrt = $092
Ddfstop = $094
Dmacon = $096
Clxcon = $098
Intena = $09A
Intreq = $09C
;BitPlane Registers
BplCon0 = $100
BplCon1 = $102
BplCon2 = $104
BplMod1 = $108
BplMod2 = $10a
BplPt0h = $0e0
BplPt0l = $0e2
BplPt1h = $0e4
BplPt1l = $0e6
BplPt2h = $0e8
BplPt2l = $0ea
BplPt3h = $0ec
BplPt3l = $0ee
BplPt4h = $0f0
BplPt4l = $0f2
BplPt5h = $0f4
BplPt5l = $0f6
;Colour Registers
Color00 = $180
Color01 = $182
Color02 = $184
Color03 = $186
Color04 = $188
Color05 = $18a
Color06 = $18c
Color07 = $18e
Color08 = $190
Color09 = $192
Color10 = $194
Color11 = $196
Color12 = $198
Color13 = $19a
Color14 = $19c
Color15 = $19e
Color16 = $1a0
Color17 = $1a2
Color18 = $1a4
Color19 = $1a6
Color20 = $1a8
Color21 = $1aa
Color22 = $1ac
Color23 = $1ae
Color24 = $1b0
Color25 = $1b2
Color26 = $1b4
Color27 = $1b6
Color28 = $1b8
Color29 = $1ba
Color30 = $1bc
Color31 = $1be
EcsNop = $1fe