sb: use qboot
This commit is contained in:
Vince Weaver
parent
b2c4346a20
commit
68dab4547d
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@ -0,0 +1,34 @@
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include ../../Makefile.inc
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DOS33 = ../../utils/dos33fs-utils/dos33
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TOKENIZE = ../../utils/asoft_basic-utils/tokenize_asoft
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EMPTY_DISK = ../../empty_disk/empty.dsk
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all: tic.dsk
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tic.dsk: HELLO PLASMA.BAS ROTOZOOM.BAS
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cp $(EMPTY_DISK) tic.dsk
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$(DOS33) -y tic.dsk SAVE A HELLO
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$(DOS33) -y tic.dsk SAVE A PLASMA.BAS
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$(DOS33) -y tic.dsk SAVE A ROTOZOOM.BAS
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####
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HELLO: hello.bas
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$(TOKENIZE) < hello.bas > HELLO
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####
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PLASMA.BAS: plasma.bas
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$(TOKENIZE) < plasma.bas > PLASMA.BAS
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####
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ROTOZOOM.BAS: rotozoom.bas
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$(TOKENIZE) < rotozoom.bas > ROTOZOOM.BAS
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####
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clean:
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rm -f *~ *.o *.lst HELLO PLASMA.BAS
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@ -0,0 +1,2 @@
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5 HOME
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10 PRINT CHR$(4);"CATALOG"
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@ -0,0 +1,21 @@
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'function TIC()
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' t=time()/499
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' for i=0,32639 do
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' x=i%240
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' y=i/240
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' v=s(x/50+t)+s(y/22+t)+s(x/32)
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' poke4(i,v*2%8)
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' end
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'end
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's=math.sin
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5 HGR2
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10 FOR X=0 TO 279
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20 FOR Y=0 TO 191
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30 V=SIN(X/50+T)+SIN(Y/22+T)+SIN(X/32)
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35 V=INT(V*3.5+3.5)
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37 IF V>7 THEN V=V-7
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38 IF V<0 THEN V=V+7
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40 HCOLOR=V:HPLOT X,Y
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50 NEXT Y,X
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60 T=T+(1/499):GOTO 10
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@ -0,0 +1,23 @@
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'function TIC()
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' t=time()/999
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' a=s(t-11)
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' b=s(t)
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' for i=0,32639 do
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' x=i%240-120
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' y=i/240-68
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' u=a*x-b*y
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' v=b*x+a*y
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' poke4(i,(u//1~v//1)//16)
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' end
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'end
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's=math.sin
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' // is floor division, ~ is bitwise XOR. That's hard in applesoft
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10 HGR2
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20 A=SIN(T-11)
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30 B=SIN(T)
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40 FOR X=-140 TO 139
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50 FOR Y=0 TO 192
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60 U=A*X-B*Y
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70 V=B*X+A*Y
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@ -4,6 +4,7 @@ ZX02 = ~/research/6502_compression/zx02.git/build/zx02
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PNG_TO_HGR = ../../utils/hgr-utils/png2hgr
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LINKER_SCRIPTS = ../../linker_scripts
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DOS33 = ../../utils/dos33fs-utils/dos33
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DOS33_RAW = ../../utils/dos33fs-utils/dos33_raw
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EMPTY_DISK = ../../empty_disk/empty.dsk
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TOKENIZE = ../../utils/asoft_basic-utils/tokenize_asoft
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@ -11,18 +12,41 @@ all: sb.dsk
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####
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sb.dsk: HELLO TITLE DUCK_POND SB FN
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sb.dsk: QBOOT QLOAD TITLE DUCK_POND SB FN
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cp $(EMPTY_DISK) sb.dsk
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$(DOS33) -y sb.dsk SAVE A HELLO
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$(DOS33) -y sb.dsk BSAVE -a 0x0c00 TITLE
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$(DOS33) -y sb.dsk BSAVE -a 0x1000 DUCK_POND
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$(DOS33) -y sb.dsk BSAVE -a 0x0c00 SB
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$(DOS33) -y sb.dsk BSAVE -a 0x6000 FN
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$(DOS33_RAW) sb.dsk 0 0 QBOOT 0 1
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$(DOS33_RAW) sb.dsk 0 2 QBOOT 1 1
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$(DOS33_RAW) sb.dsk 0 4 QBOOT 2 1
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$(DOS33_RAW) sb.dsk 1 0 QLOAD 0 0
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$(DOS33_RAW) sb.dsk 2 0 TITLE 0 0
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$(DOS33_RAW) sb.dsk 5 0 DUCK_POND 0 0
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$(DOS33_RAW) sb.dsk 8 0 SB 0 0
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$(DOS33_RAW) sb.dsk 11 0 FN 0 0
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# $(DOS33) -y sb.dsk BSAVE -a 0x1000 DUCK_POND
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# $(DOS33) -y sb.dsk BSAVE -a 0x0c00 SB
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# $(DOS33) -y sb.dsk BSAVE -a 0x6000 FN
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####
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QBOOT: qboot_sector.o
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ld65 -o QBOOT qboot_sector.o -C $(LINKER_SCRIPTS)/apple2_800.inc
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qboot_sector.o: qboot_sector.s qboot_stage2.s
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ca65 -o qboot_sector.o qboot_sector.s -l qboot_sector.lst
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####
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QLOAD: qload.o
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ld65 -o QLOAD qload.o -C $(LINKER_SCRIPTS)/apple2_1200.inc
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qload.o: qload.s qboot.inc
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ca65 -o qload.o qload.s -l qload.lst
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####
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SB: sb.o
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ld65 -o SB sb.o -C $(LINKER_SCRIPTS)/apple2_c00.inc
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ld65 -o SB sb.o -C $(LINKER_SCRIPTS)/apple2_6000.inc
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sb.o: sb.s zx02_optim.s \
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zp.inc hardware.inc
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@ -50,7 +74,7 @@ fn.o: fn.s zx02_optim.s duet.s hgr_sprite_mask.s hgr_sprite.s hgr_tables.s \
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####
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TITLE: title.o
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ld65 -o TITLE title.o -C $(LINKER_SCRIPTS)/apple2_c00.inc
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ld65 -o TITLE title.o -C $(LINKER_SCRIPTS)/apple2_6000.inc
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title.o: title.s zx02_optim.s \
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zp.inc hardware.inc
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@ -60,7 +84,7 @@ title.o: title.s zx02_optim.s \
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####
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DUCK_POND: duck_pond.o
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ld65 -o DUCK_POND duck_pond.o -C $(LINKER_SCRIPTS)/apple2_1000.inc
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ld65 -o DUCK_POND duck_pond.o -C $(LINKER_SCRIPTS)/apple2_6000.inc
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duck_pond.o: duck_pond.s zx02_optim.s \
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zp.inc hardware.inc \
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@ -59,7 +59,7 @@ title_screen:
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lda #>title_data
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sta ZX0_src+1
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lda #$C ; load at $c00
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lda #$c ; load at $C00
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jsr full_decomp
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@ -111,7 +111,7 @@ init_game:
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lda #>main_data
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sta ZX0_src+1
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lda #$C
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lda #$c
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jsr full_decomp
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@ -0,0 +1,8 @@
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seek = $1126
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driveon = $119D
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driveoff = $1122
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load_new = $11AB
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load_address=$11C4
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load_track=load_address+1
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load_sector=load_address+2
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load_length=load_address+3
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@ -0,0 +1,244 @@
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; fast seek/multi-read
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; copyright (c) Peter Ferrie 2015-16
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; Paramaters for loading QLOAD
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sectors = 14 ; user-defined
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firsttrk = 1 ; user-defined, first track to read
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firstsec = 0 ; user-defined, first sector to read
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address = $12 ; user-defined
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entry = $1200 ; user-defined
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version = 1
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;memory usage:
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;256 bytes ($200-2ff) static table
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grouped = $200
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; stay away from interrupt vectors at $3fe !!!
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;106 bytes ($300-369) static table
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preshift = $300
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zvalue = $fd ; only during init
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znibble = $fe ; only during init
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zmask = $ff ; only during init
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WHICH_SLOT = $DA
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; $26/$27 sector read location (ROM)
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; $3D sector number (ROM)
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; at entry (at least on AppleWin) A=1, X=60 (slot<<4), Y=0
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; qkumba says cffa cards leave Y at $10
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; 26/27 = 00/09
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; 3D = 1
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; For Disk II booting, the firmware loads track0/sector0
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; to $800 and then jumps to $801
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.org $800
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.byte 1 ; number of sectors for ROM to load
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boot_entry:
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; this code loads two sectors up to $10/$11
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; assume A=1 coming in here
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lsr ; check sector number
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; A=0, carry=1
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tay ; Y=0
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adc #$0f ; A=$10 (destintation)
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sta $27 ; set or update address as needed
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cmp #$12
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; 10 11 12 (1 1 1)
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; be, bf, c0 (1011 1011 1100)
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; so if hit $c000 we are done
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beq done_load_2 ; branch if loaded 2
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inc $3d ; increment sector (faster to find)
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; call to the read routine in proper slot
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; using rts to jump indirect to
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; $CX5C
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; this routine reads sector in $3D on track in $41
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; to address in $26/$27
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; when it's done it jumps back to $801
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stx WHICH_SLOT ; save for later
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txa ; x is slot# << 4
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lsr
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lsr
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lsr
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lsr
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ora #$c0 ; slot to PROM base
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pha
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lda #$5b ;read-1
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pha
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rts ; return used to call $CX5C in DISK II ROM
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done_load_2:
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; patch self modifying code for Q6L read
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txa
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ora #$8c ; slot to Q6L
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; Q6L?
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; if slot 6, after this A is $EC
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; Y should be 2 here
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patch_loop:
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iny
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ldx patchtbl-3, Y
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sta code_begin, X ; replace placeholders with Q6L
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; BE02 = EC? lda c0ec
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; so sets to c08c (Q6L)
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bne patch_loop
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; patch self-modifying code for turning motor off
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and #$f8 ; MOTOROFF (c088) -> c0e8
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sta slotpatch7+1
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; patch self-modifying code for turning motor on
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clc
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adc #1 ; MOTORON (c089) -> c0e9
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sta slotpatch9+1
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; patch self-modifying code for phase off
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eor #9 ; PHASEOFF (c080)
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sta slotpatch8+1
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ldx #$3f
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stx zmask
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inx
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ldy #$7f
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bne skip_ahead ; branch always
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; pad with zeros until $839
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; $839 is the entry point
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; adjusts address at $8FE to be entry point
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; jumps to boot 2
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;.res $839-*
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; lda #>(entry-1)
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; pha
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; lda #<(entry-1)
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; pha
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; jsr preread
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; jmp $1000 ; stage2 entry point
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patchtbl:
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.byte <(slotpatch1+1), <(slotpatch2+1), <(slotpatch3+1)
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.byte <(slotpatch4+1), <(slotpatch5+1), <(slotpatch6+1)
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indextbl: ;the 0 also terminates the patchtbl list!
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.byte 0, 2, 1, 3
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;construct denibbilisation table
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;pre-shifted for interleave read
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skip_ahead:
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loopaa:
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sty znibble
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tya
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asl
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bit znibble
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beq loopz
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ora znibble
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eor #$ff
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and #$7e
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loopa:
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bcs loopz
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lsr
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bne loopa
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dex
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txa
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asl
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asl
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sta preshift-$16, Y
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loopz:
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dey
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bne loopaa
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;construct 2-bit group table
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sty zvalue
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loopbb:
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lsr zmask
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lsr zmask
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loopb:
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lda indextbl, X
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sta grouped, Y
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inc zvalue
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lda zvalue
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and zmask
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bne loopy
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inx
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txa
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and #3
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tax
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loopy:
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iny
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iny
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iny
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iny
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cpy #3
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bcs loopb
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iny
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cpy #3
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bcc loopbb
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lda #>(entry-1)
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pha
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lda #<(entry-1)
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pha
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jsr preread
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; seek backward support
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; sty startsec+1
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; sta tmpadr+1
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; stx total+1
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jmp seekread
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preread:
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;copy post-read if necessary
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;push post-read address here
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; pla
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; tax
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; pla
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; tay
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; lda #>(postread-1)
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; pha
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; lda #<(postread-1)
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; pha
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; tya
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; pha
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; txa
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; pha
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lda #<(firsttrk*2)
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sta phase+1
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ldx #sectors
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lda #address
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ldy #firstsec
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rts
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end_code:
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.res $8fe-*
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; traditionally, entry point to jump to at end of loading
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; $1000 in this case
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;*=$8fe
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.byte $10, $00
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.include "qboot_stage2.s"
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@ -0,0 +1,382 @@
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; the following lives on sectors $0E and $0D
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; why?
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; request sector 2 and 4, and the interleave is
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; beneath apple dos (3-23)
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; Physical (firmware) : 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
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; DOS33 mapping : 0, 7, 14, 6, 13, 5, 12, 4, 11, 3, 10, 2, 9, 1, 8, 15
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; Beneath Apple DOS
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; p86 (dos reference)
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;
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;WAIT = $FCA8 ;; delay 1/2(26+27A+5A^2) us
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WAIT = norom_wait
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.org $1000
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code_begin:
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.byte version
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readnib:
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slotpatch1: ; smc
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lda $c0d1 ; gets set to C08C (Q6L) read
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bpl readnib
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rts
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;fill address array for one track
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seekread:
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sty startsec+1
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sta tmpadr+1
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stx total+1
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inittrk:
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sec
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lda #$10
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sbc startsec+1
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cmp total+1
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bcs it_skip
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tax
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it_skip:
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stx partial1
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stx partial2
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jsr seek
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startsec:
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ldy #$d1
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tmpadr:
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tmpadr_loop:
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lda #$d1
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sta addrtbl, y
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inc tmpadr+1
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iny
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dec partial1
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bne tmpadr_loop
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;====================================
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; read a sector
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;====================================
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; first address field
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;====================================
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; starts with $D5 $AA $96
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; then XX YY volume
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; then XX YY track
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; then XX YY sector
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; then XX YY checksum
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; then ends with $DE $AA $EB
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;====================================
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; data field
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;====================================
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; starts with $D5 $AA $AD
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; 342 bytes of data
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; XX checksum
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; ends with $DE $AA $EB
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read:
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outer_read:
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jsr readnib
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inner_read:
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cmp #$d5 ; look for $D5 part of addr field
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bne outer_read
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|
||||
jsr readnib ; look for $D5 $AA
|
||||
cmp #$aa
|
||||
bne inner_read
|
||||
|
||||
; look for $D5 $AA $AD
|
||||
|
||||
tay ; we need Y=#$AA later
|
||||
jsr readnib
|
||||
eor #$ad ; zero A if match
|
||||
beq check_mode
|
||||
|
||||
; if not #$AD, then #$96 is assumed
|
||||
; so in address field
|
||||
|
||||
ldy #2 ; volume, track, sector
|
||||
another:
|
||||
jsr readnib
|
||||
rol ; set carry
|
||||
sta sector+1
|
||||
jsr readnib
|
||||
and sector+1
|
||||
dey
|
||||
bpl another
|
||||
|
||||
tay
|
||||
ldx addrtbl, Y ; fetch corresponding address
|
||||
beq read ; done?
|
||||
|
||||
sta sector+1 ; store index for later
|
||||
|
||||
stx adrpatch1+2
|
||||
stx adrpatch8+2
|
||||
stx adrpatch2+2
|
||||
stx adrpatch3+2
|
||||
stx adrpatch5+2
|
||||
stx adrpatch7+2
|
||||
|
||||
inx
|
||||
stx adrpatch9+2
|
||||
dex
|
||||
|
||||
dex
|
||||
stx adrpatch4+2
|
||||
stx adrpatch6+2
|
||||
|
||||
ldy #$fe
|
||||
|
||||
loop2:
|
||||
adrpatch1:
|
||||
lda $d102, Y
|
||||
pha
|
||||
iny
|
||||
bne loop2
|
||||
|
||||
branch_read:
|
||||
bcs read ; branch always
|
||||
|
||||
check_mode:
|
||||
cpx #0
|
||||
beq read ; loop if not expecting #$AD
|
||||
|
||||
loop33:
|
||||
sta tmpval+1 ; zero rolling checksum
|
||||
slotpatch2:
|
||||
loop4:
|
||||
ldx $c0d1
|
||||
bpl loop4
|
||||
lda preshift-$96, X
|
||||
adrpatch2:
|
||||
sta $d102, Y ; store 2-bit array
|
||||
|
||||
tmpval:
|
||||
eor #$d1
|
||||
iny
|
||||
bne loop33
|
||||
ldy #$aa
|
||||
slotpatch3:
|
||||
loop5:
|
||||
ldx $c0d1
|
||||
bpl loop5
|
||||
eor preshift-$96, X
|
||||
adrpatch3:
|
||||
ldx $d102, Y ; bit2tbl
|
||||
eor grouped+2, X ; first 86 nibbles use group bits 0-1
|
||||
adrpatch4:
|
||||
sta $d156, y
|
||||
iny
|
||||
bne loop5
|
||||
and #$fc
|
||||
ldy #$aa
|
||||
slotpatch4:
|
||||
loop6:
|
||||
ldx $c0d1
|
||||
bpl loop6
|
||||
eor preshift-$96, X
|
||||
adrpatch5:
|
||||
ldx $d102, Y ; bit2tbl
|
||||
eor grouped+1, X ; second 86 nibbles use group bits 2-3
|
||||
adrpatch6:
|
||||
sta $d1ac, Y
|
||||
iny
|
||||
bne loop6
|
||||
and #$fc
|
||||
ldx #$ac
|
||||
slotpatch5:
|
||||
loop7:
|
||||
ldy $c0d1
|
||||
bpl loop7
|
||||
eor preshift-$96, Y
|
||||
adrpatch7:
|
||||
ldy $d100, X ; bit2tbl
|
||||
eor grouped, Y ; last 84 nibbles use group bits 4-5
|
||||
adrpatch8:
|
||||
sta $d100, x
|
||||
inx
|
||||
bne loop7
|
||||
and #$fc
|
||||
slotpatch6:
|
||||
loop8:
|
||||
ldy $c0d1
|
||||
bpl loop8
|
||||
eor preshift-$96, Y
|
||||
cmp #1 ; carry = !zero
|
||||
ldy #1
|
||||
loop9:
|
||||
pla
|
||||
adrpatch9:
|
||||
sta $d100, Y
|
||||
dey
|
||||
bpl loop9
|
||||
branch_read2:
|
||||
bcs branch_read ; branch if checksum failure
|
||||
|
||||
sector:
|
||||
ldy #$d1
|
||||
txa
|
||||
sta addrtbl, Y ; zero corresponding address
|
||||
dec total+1
|
||||
dec partial2 ; adjust remaining count
|
||||
; (faster than looping over array)
|
||||
sec
|
||||
bne branch_read2 ; read all requested sectors in one track
|
||||
|
||||
sta startsec+1 ; this was missing from original code
|
||||
; leading to trouble on wrap around
|
||||
; it not starting at sector0
|
||||
total:
|
||||
ldx #$d1
|
||||
beq driveoff
|
||||
inc phase+1
|
||||
inc phase+1 ; update current track
|
||||
jmp inittrk
|
||||
|
||||
driveoff:
|
||||
slotpatch7:
|
||||
lda $c0d1
|
||||
|
||||
seekret:
|
||||
rts
|
||||
|
||||
seek:
|
||||
ldx #0
|
||||
stx step+1
|
||||
copy_cur:
|
||||
curtrk:
|
||||
lda #0
|
||||
sta tmpval+1
|
||||
sec
|
||||
phase:
|
||||
sbc #$d1
|
||||
beq seekret
|
||||
|
||||
; if seek backwards
|
||||
bcs sback
|
||||
|
||||
eor #$ff
|
||||
inc curtrk+1
|
||||
|
||||
bcc ssback
|
||||
sback:
|
||||
adc #$fe
|
||||
dec curtrk+1
|
||||
ssback:
|
||||
cmp step+1
|
||||
bcc loop10
|
||||
step:
|
||||
lda #$d1
|
||||
loop10:
|
||||
cmp #8
|
||||
bcs loop11
|
||||
tay
|
||||
sec
|
||||
loop11:
|
||||
lda curtrk+1
|
||||
ldx step1, Y
|
||||
bne loop12
|
||||
loopmmm:
|
||||
clc
|
||||
lda tmpval+1
|
||||
ldx step2, Y
|
||||
loop12:
|
||||
stx sector+1
|
||||
and #3
|
||||
rol
|
||||
tax
|
||||
slotpatch8:
|
||||
sta $c0d1, X
|
||||
loopmm:
|
||||
ldx #$13
|
||||
loopm:
|
||||
dex
|
||||
bne loopm
|
||||
dec sector+1
|
||||
bne loopmm
|
||||
lsr
|
||||
bcs loopmmm
|
||||
inc step+1
|
||||
bne copy_cur
|
||||
|
||||
step1: .byte 1, $30, $28, $24, $20, $1e, $1d, $1c
|
||||
step2: .byte $70, $2c, $26, $22, $1f, $1e, $1d, $1c
|
||||
addrtbl: .res 16
|
||||
|
||||
partial1: .byte $00
|
||||
partial2: .byte $00
|
||||
code_end:
|
||||
|
||||
|
||||
;==========================
|
||||
; enable drive motor
|
||||
;==========================
|
||||
|
||||
driveon:
|
||||
|
||||
slotpatch9:
|
||||
lda $c0d1
|
||||
|
||||
; wait 1s
|
||||
|
||||
ldx #6
|
||||
wait_1s:
|
||||
lda #255
|
||||
jsr WAIT
|
||||
dex
|
||||
bne wait_1s
|
||||
|
||||
rts
|
||||
|
||||
load_new:
|
||||
|
||||
jsr driveon
|
||||
|
||||
lda load_track
|
||||
asl ; track to start*2
|
||||
sta phase+1
|
||||
|
||||
lda load_sector
|
||||
tay ; sector to start
|
||||
|
||||
lda load_length ; length
|
||||
tax
|
||||
|
||||
lda load_address ; address to load
|
||||
|
||||
jsr seekread
|
||||
|
||||
rts
|
||||
|
||||
load_address:
|
||||
.byte $00
|
||||
load_track:
|
||||
.byte $00
|
||||
load_sector:
|
||||
.byte $00
|
||||
load_length:
|
||||
.byte $00
|
||||
|
||||
|
||||
|
||||
; copy of ROM wait
|
||||
; because we might disable ROM
|
||||
|
||||
norom_wait:
|
||||
sec
|
||||
wait2:
|
||||
pha
|
||||
wait3:
|
||||
sbc #$01
|
||||
bne wait3
|
||||
pla
|
||||
sbc #$01
|
||||
bne wait2
|
||||
rts
|
||||
wait_end:
|
||||
|
||||
|
|
@ -0,0 +1,192 @@
|
|||
; Loader for sb
|
||||
|
||||
.include "zp.inc"
|
||||
.include "hardware.inc"
|
||||
|
||||
;.include "common_defines.inc"
|
||||
.include "qboot.inc"
|
||||
|
||||
qload_start:
|
||||
|
||||
; init the write code
|
||||
; lda WHICH_SLOT
|
||||
; jsr popwr_init
|
||||
|
||||
; first time entry
|
||||
; start by loading text title
|
||||
|
||||
lda #0 ; load LEMM engine
|
||||
sta WHICH_LOAD
|
||||
|
||||
lda #1
|
||||
sta CURRENT_DISK ; current disk number
|
||||
|
||||
forever_loop:
|
||||
jsr load_file
|
||||
|
||||
jsr $6000 ; jump to loaded file
|
||||
|
||||
jmp forever_loop
|
||||
|
||||
;====================================
|
||||
; loads file specified by WHICH_LOAD
|
||||
;====================================
|
||||
load_file:
|
||||
ldx WHICH_LOAD
|
||||
|
||||
lda which_disk_array,X
|
||||
cmp CURRENT_DISK
|
||||
bne change_disk
|
||||
|
||||
load_file_no_diskcheck:
|
||||
lda load_address_array,X
|
||||
sta load_address
|
||||
|
||||
lda track_array,X
|
||||
sta load_track
|
||||
|
||||
lda sector_array,X
|
||||
sta load_sector
|
||||
|
||||
lda length_array,X
|
||||
sta load_length
|
||||
|
||||
jsr load_new
|
||||
|
||||
rts
|
||||
|
||||
;===================================================
|
||||
;===================================================
|
||||
; change disk
|
||||
;===================================================
|
||||
;===================================================
|
||||
|
||||
change_disk:
|
||||
.if 0
|
||||
; turn off disk drive light
|
||||
|
||||
jsr driveoff
|
||||
|
||||
jsr TEXT
|
||||
jsr HOME
|
||||
|
||||
lda #<error_string
|
||||
sta OUTL
|
||||
lda #>error_string
|
||||
sta OUTH
|
||||
|
||||
ldx WHICH_LOAD
|
||||
lda which_disk_array,X
|
||||
clc
|
||||
adc #48
|
||||
|
||||
ldy #19
|
||||
sta (OUTL),Y
|
||||
|
||||
ldy #0
|
||||
|
||||
quick_print:
|
||||
lda (OUTL),Y
|
||||
beq quick_print_done
|
||||
jsr COUT1
|
||||
iny
|
||||
jmp quick_print
|
||||
|
||||
quick_print_done:
|
||||
|
||||
fnf_keypress:
|
||||
lda KEYPRESS
|
||||
bpl fnf_keypress
|
||||
bit KEYRESET
|
||||
|
||||
;==============================================
|
||||
; actually verify proper disk is there
|
||||
; read T0:S0 and verify proper disk
|
||||
|
||||
lda WHICH_LOAD
|
||||
pha
|
||||
|
||||
ldx #LOAD_FIRST_SECTOR ; load track 0 sector 0
|
||||
stx WHICH_LOAD
|
||||
|
||||
jsr load_file_no_diskcheck
|
||||
|
||||
pla
|
||||
sta WHICH_LOAD
|
||||
tax
|
||||
|
||||
; first sector now in $c00
|
||||
; offset 59
|
||||
; disk1 = $0a
|
||||
; disk2 = $32 ('2')
|
||||
; disk3 = $33 ('3')
|
||||
|
||||
lda $c59
|
||||
cmp #$0a
|
||||
beq is_disk1
|
||||
cmp #$32
|
||||
beq is_disk2
|
||||
cmp #$33
|
||||
beq is_disk3
|
||||
bne change_disk ; unknown disk
|
||||
|
||||
is_disk1:
|
||||
lda #1
|
||||
bne disk_compare
|
||||
|
||||
is_disk2:
|
||||
lda #2
|
||||
bne disk_compare
|
||||
|
||||
is_disk3:
|
||||
lda #3
|
||||
|
||||
disk_compare:
|
||||
cmp which_disk_array,X
|
||||
bne change_disk ; disk mismatch
|
||||
|
||||
;==============================================
|
||||
; all good, retry original load
|
||||
|
||||
jsr HOME
|
||||
|
||||
ldx WHICH_LOAD
|
||||
lda which_disk_array,X
|
||||
sta CURRENT_DISK
|
||||
|
||||
jmp load_file
|
||||
|
||||
; offset for disk number is 19
|
||||
error_string:
|
||||
.byte "PLEASE INSERT DISK 1, PRESS RETURN",0
|
||||
|
||||
.endif
|
||||
|
||||
which_disk_array:
|
||||
.byte 1,1,1,1 ; TITLE, DUCK, SB, FN
|
||||
.byte 1,1,1,1 ; LEVEL4, LEVEL5, LEVEL6, LEVEL7
|
||||
.byte 1,1,1,1 ; LEVEL8, LEVEL9, LEVEL10
|
||||
|
||||
load_address_array:
|
||||
.byte $60,$60,$60,$60 ; TITLE, DUCK, SB, FN
|
||||
.byte $90,$90,$90,$90 ; LEVEL4, LEVEL5, LEVEL6, LEVEL7
|
||||
.byte $90,$90,$90,$90 ; LEVEL8, LEVEL9, LEVEL10
|
||||
|
||||
track_array:
|
||||
.byte 2, 5, 8,11 ; TITLE, DUCK, SB, FN
|
||||
.byte 15,18,21,24 ; LEVEL4, LEVEL5, LEVEL6, LEVEL7
|
||||
.byte 27,30,33,33 ; LEVEL8, LEVEL9, LEVEL10
|
||||
|
||||
sector_array:
|
||||
.byte 0, 0, 0, 0 ; TITLE, DUCK, SB, FN
|
||||
.byte 0, 0, 0, 0 ; LEVEL4, LEVEL5, LEVEL6, LEVEL7
|
||||
.byte 0, 0, 0, 0 ; LEVEL8, LEVEL9, LEVEL10
|
||||
|
||||
length_array:
|
||||
.byte 16, 16, 16, 32 ; TITLE, DUCK, SB, FN
|
||||
.byte 46, 46, 46, 46 ; LEVEL4, LEVEL5, LEVEL6, LEVEL7
|
||||
.byte 46, 46, 32, 32 ; LEVEL8, LEVEL9, LEVEL10
|
||||
|
||||
qload_end:
|
||||
|
||||
.assert (>qload_end - >qload_start) < $e , error, "loader too big"
|
||||
|
|
@ -57,7 +57,10 @@ wait_until_keypress:
|
|||
bit KEYRESET ; clear the keyboard buffer
|
||||
|
||||
which_ok:
|
||||
jmp load_loop
|
||||
lda #0
|
||||
sta WHICH_LOAD
|
||||
rts
|
||||
|
||||
|
||||
|
||||
|
||||
|
|
|
|||
|
|
@ -56,11 +56,22 @@ wait_until_keypress:
|
|||
bpl wait_until_keypress ; 3
|
||||
bit KEYRESET ; clear the keyboard buffer
|
||||
|
||||
and #$7f
|
||||
cmp #'1'
|
||||
bcc which_ok
|
||||
cmp #'4'
|
||||
bcs which_ok
|
||||
|
||||
jmp done
|
||||
|
||||
which_ok:
|
||||
jmp load_loop
|
||||
|
||||
|
||||
|
||||
done:
|
||||
and #$f
|
||||
sta WHICH_LOAD
|
||||
rts
|
||||
|
||||
.include "zx02_optim.s"
|
||||
|
||||
|
|
|
|||
|
|
@ -10,6 +10,8 @@ ZX0_dst = ZP+4
|
|||
bitr = ZP+6
|
||||
pntr = ZP+7
|
||||
|
||||
WHICH_LOAD = $09
|
||||
|
||||
;; Zero page monitor routines addresses
|
||||
|
||||
WNDLFT = $20
|
||||
|
|
@ -124,6 +126,8 @@ LYRICS_ACTIVE = $9B
|
|||
;FORTYCOL = $9C
|
||||
CURSOR = $9D
|
||||
|
||||
CURRENT_DISK = $DC
|
||||
|
||||
; More zero-page addresses
|
||||
; we try not to conflict with anything DOS, MONITOR or BASIC related
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue