mirror of
https://github.com/deater/dos33fsprogs.git
synced 2025-01-01 05:31:52 +00:00
riven_hgr: start working on having multiple disks
This commit is contained in:
Vince Weaver
parent
33bb8ce34b
commit
ef8b039e65
@ -7,37 +7,23 @@ EMPTY_DISK = ../../empty_disk/
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LINKER_SCRIPTS = ../../linker_scripts/
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all: riven_hgr.dsk
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all: riven_disk39.dsk
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riven_hgr.dsk: QBOOT QLOAD TITLE \
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riven_disk39.dsk: QBOOT QLOAD TITLE \
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LEVEL_PROJECTOR LEVEL_MAGSTEPS LEVEL_MAGLEV LEVEL_OUTSIDE \
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MOVIE1 MOVIE2
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cp $(EMPTY_DISK)/empty.dsk riven_hgr.dsk
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$(DOS33_RAW) riven_hgr.dsk 0 0 QBOOT 0 1
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$(DOS33_RAW) riven_hgr.dsk 0 2 QBOOT 1 1
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$(DOS33_RAW) riven_hgr.dsk 0 4 QBOOT 2 1
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$(DOS33_RAW) riven_hgr.dsk 1 0 QLOAD 0 0
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$(DOS33_RAW) riven_hgr.dsk 1 8 TITLE 0 0
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$(DOS33_RAW) riven_hgr.dsk 2 0 LEVEL_PROJECTOR 0 0
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$(DOS33_RAW) riven_hgr.dsk 9 0 LEVEL_OUTSIDE 0 0
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$(DOS33_RAW) riven_hgr.dsk 17 0 LEVEL_MAGSTEPS 0 0
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$(DOS33_RAW) riven_hgr.dsk 21 0 LEVEL_MAGLEV 0 0
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$(DOS33_RAW) riven_hgr.dsk 25 0 MOVIE1 0 0
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$(DOS33_RAW) riven_hgr.dsk 27 0 MOVIE2 0 0
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#riven_hgr.dsk: HELLO LOADER TITLE \
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# LEVEL_PROJECTOR LEVEL_MAGSTEPS LEVEL_MAGLEV LEVEL_OUTSIDE \
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# MOVIE1 MOVIE2
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# cp $(EMPTY_DISK) riven_hgr.dsk
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# $(DOS33) -y riven_hgr.dsk SAVE A HELLO
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# $(DOS33) -y riven_hgr.dsk BSAVE -a 0x1000 LOADER
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# $(DOS33) -y riven_hgr.dsk BSAVE -a 0x4000 TITLE
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# $(DOS33) -y riven_hgr.dsk BSAVE -a 0x4000 LEVEL_PROJECTOR
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# $(DOS33) -y riven_hgr.dsk BSAVE -a 0x4000 LEVEL_MAGSTEPS
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# $(DOS33) -y riven_hgr.dsk BSAVE -a 0x4000 LEVEL_MAGLEV
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# $(DOS33) -y riven_hgr.dsk BSAVE -a 0x4000 LEVEL_OUTSIDE
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# $(DOS33) -y riven_hgr.dsk BSAVE -a 0x4000 MOVIE1
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# $(DOS33) -y riven_hgr.dsk BSAVE -a 0x4000 MOVIE2
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cp $(EMPTY_DISK)/empty.dsk riven_disk39.dsk
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$(DOS33_RAW) riven_disk39.dsk 0 0 QBOOT 0 1
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$(DOS33_RAW) riven_disk39.dsk 0 2 QBOOT 1 1
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$(DOS33_RAW) riven_disk39.dsk 0 4 QBOOT 2 1
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$(DOS33_RAW) riven_disk39.dsk 1 0 QLOAD 0 0
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$(DOS33_RAW) riven_disk39.dsk 1 8 TITLE 0 0
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$(DOS33_RAW) riven_disk39.dsk 2 0 LEVEL_PROJECTOR 0 0
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$(DOS33_RAW) riven_disk39.dsk 9 0 LEVEL_OUTSIDE 0 0
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$(DOS33_RAW) riven_disk39.dsk 17 0 LEVEL_MAGSTEPS 0 0
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$(DOS33_RAW) riven_disk39.dsk 21 0 LEVEL_MAGLEV 0 0
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$(DOS33_RAW) riven_disk39.dsk 25 0 MOVIE1 0 0
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$(DOS33_RAW) riven_disk39.dsk 27 0 MOVIE2 0 0
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###
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@ -66,11 +52,11 @@ HELLO: hello.bas
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####
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LOADER: loader.o
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ld65 -o LOADER loader.o -C $(LINKER_SCRIPTS)/apple2_1000.inc
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#LOADER: loader.o
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# ld65 -o LOADER loader.o -C $(LINKER_SCRIPTS)/apple2_1000.inc
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loader.o: loader.s hardware_detect.s
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ca65 -o loader.o loader.s -l loader.lst
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#loader.o: loader.s hardware_detect.s
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# ca65 -o loader.o loader.s -l loader.lst
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####
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@ -93,7 +79,7 @@ level_outside.o: level_outside.s zp.inc hardware.inc \
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hgr_sprite.s hgr_tables.s \
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keyboard.s \
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hgr_14x14_sprite.s \
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leveldata_outside.inc \
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disk39_files/leveldata_outside.inc \
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graphics_sprites/pointer_sprites.inc \
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graphics_outside/outside_graphics.inc
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ca65 -o level_outside.o level_outside.s -l level_outside.lst
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@ -108,7 +94,7 @@ level_projector.o: level_projector.s zp.inc hardware.inc \
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hgr_sprite.s hgr_tables.s \
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keyboard.s \
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hgr_14x14_sprite.s \
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leveldata_projector.inc \
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disk39_files/leveldata_projector.inc \
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graphics_sprites/pointer_sprites.inc \
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graphics_projector/projector_graphics.inc
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ca65 -o level_projector.o level_projector.s -l level_projector.lst
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@ -123,7 +109,7 @@ level_magsteps.o: level_magsteps.s zp.inc hardware.inc \
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hgr_sprite.s hgr_tables.s \
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keyboard.s \
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hgr_14x14_sprite.s \
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leveldata_magsteps.inc \
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disk39_files/leveldata_magsteps.inc \
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graphics_sprites/pointer_sprites.inc \
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graphics_magsteps/magsteps_graphics.inc
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ca65 -o level_magsteps.o level_magsteps.s -l level_magsteps.lst
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@ -138,7 +124,7 @@ level_maglev.o: level_maglev.s zp.inc hardware.inc \
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hgr_sprite.s hgr_tables.s \
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keyboard.s \
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hgr_14x14_sprite.s \
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leveldata_maglev.inc \
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disk39_files/leveldata_maglev.inc \
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graphics_sprites/pointer_sprites.inc \
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graphics_maglev/maglev_graphics.inc
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ca65 -o level_maglev.o level_maglev.s -l level_maglev.lst
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@ -14,19 +14,20 @@ T 25 = MOVIE1 7837 bytes 32S = 2T0S ~
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T 27 = MOVIE2 32000 bytes 128S = 8T0S ~
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MEMORY
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MEMORY MAP
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$0000-$00FF = zero page
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$0100-$01FF = stack
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$0200-$02FF = disk stuff
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$0300-$03ff = disk/interrupts
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$0400-$07ff = lores graphics page1
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$0800-$08ff = lores graphics page2 (qboot initial sector)
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$0800-$0bff = lores graphics page2
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$800-$8ff = (qboot initial sector)
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$1000-$11ff = qboot_stage2 (disk code)
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$1200-$17FF = HGR lookup tables
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$1800-$1FFF = QLOAD = loader code
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$1300-$16FF = HGR lookup tables
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$1700-$17FF = ????
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$1800-$1FFF = QLOAD = loader code (2k?)
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$2000-$3FFF = HGR Page1, lores movie overlays
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$4000-$B7FF = our code
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$B800-$BFFF = hires lookup tables?
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$4000-$BFFF = our code (up to 32k in theory)
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$C000-$CFFF = I/O
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$D000-$FFFF = ROM
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@ -1,26 +1,16 @@
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+ Correctness
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-> do I need to save screen holes?
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share code in QLOAD to free up room in levels
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+ Finish maglev sequence
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-> should we optimize graphics better? unlikely to be more than
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1k or so there
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-> do the handle animation at end?
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-> sound effects?
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-> if out of room in RAM (but not disk) optionally load tail end
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to language card on machines that have it?
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+ Main sequence
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-> try to fit more locations in. two overlook scenes,
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turning around in projector room
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disk39:
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-> try to fit more locations
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have one already done that didn't fit (overlook otherway)
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-> try to fit last little bit of maglev sequence
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+ do the handle animation at end?
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+ sound effects?
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+ if out of room in RAM (but not disk)
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optionally load tail end
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to language card on machines that have it?
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+ Better keyboard handling on IIe
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-> was actually one of the main reasons I started working on this
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+ Use QBOOT instead of QLOAD
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-> would free up disk space
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catalog track, T/S sectors, two tracks of DOS?
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-> would have to manually pack levels
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-> would be faster in theory?
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+ Add in "switch disk" message
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29
games/riven_hgr/graphics_cart/Makefile
Normal file
29
games/riven_hgr/graphics_cart/Makefile
Normal file
@ -0,0 +1,29 @@
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include ../../../Makefile.inc
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ZX02 = ~/research/6502_compression/zx02.git/build/zx02 -f
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PNG_TO_HGR = ../../../utils/hgr-utils/png2hgr
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all: cart_graphics.inc
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cart_graphics.inc: \
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cart_n.hgr.zx02 cart_w.hgr.zx02 cart_e.hgr.zx02 cart_s.hgr.zx02 \
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in_cart_e.hgr.zx02
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echo "cart_n_zx02: .incbin \"cart_n.hgr.zx02\"" > cart_graphics.inc
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echo "cart_w_zx02: .incbin \"cart_w.hgr.zx02\"" >> cart_graphics.inc
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echo "cart_e_zx02: .incbin \"cart_e.hgr.zx02\"" >> cart_graphics.inc
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echo "cart_s_zx02: .incbin \"cart_s.hgr.zx02\"" >> cart_graphics.inc
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echo "in_cart_e_zx02: .incbin \"in_cart_e.hgr.zx02\"" >> cart_graphics.inc
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####
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%.hgr: %.png
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$(PNG_TO_HGR) $< > $@
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%.hgr.zx02: %.hgr
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$(ZX02) -f $< $@
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####
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clean:
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rm -f *~ *.o *.lst *.zx02 *.hgr cart_graphics.inc
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BIN
games/riven_hgr/graphics_cart/cart_e.png
Normal file
BIN
games/riven_hgr/graphics_cart/cart_e.png
Normal file
Binary file not shown.
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After Width: | Height: | Size: 3.9 KiB |
BIN
games/riven_hgr/graphics_cart/cart_w.png
Normal file
BIN
games/riven_hgr/graphics_cart/cart_w.png
Normal file
Binary file not shown.
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After Width: | Height: | Size: 3.5 KiB |
@ -53,12 +53,6 @@ riven_maglev:
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; init
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;===================================
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; done in title
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; lda #$20
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; sta HGR_PAGE
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; jsr hgr_make_tables
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jsr change_location
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jsr save_bg_14x14 ; save old bg
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@ -160,4 +154,4 @@ handle2_clicked:
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.include "graphics_sprites/pointer_sprites.inc"
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.include "leveldata_maglev.inc"
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.include "disk39_files/leveldata_maglev.inc"
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@ -53,12 +53,6 @@ riven_magsteps:
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; init
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;===================================
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; done in title
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; lda #$20
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; sta HGR_PAGE
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; jsr hgr_make_tables
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jsr change_location
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jsr save_bg_14x14 ; save old bg
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@ -120,4 +114,4 @@ really_exit:
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.include "graphics_sprites/pointer_sprites.inc"
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.include "leveldata_magsteps.inc"
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.include "disk39_files/leveldata_magsteps.inc"
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@ -129,4 +129,4 @@ call_button_clicked:
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.include "graphics_sprites/pointer_sprites.inc"
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.include "leveldata_outside.inc"
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.include "disk39_files/leveldata_outside.inc"
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@ -53,12 +53,6 @@ riven_projector:
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; init
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;===================================
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; done in title
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; lda #$20
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; sta HGR_PAGE
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; jsr hgr_make_tables
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jsr change_location
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jsr save_bg_14x14 ; save old bg
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@ -116,8 +110,6 @@ really_exit:
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.include "graphics_projector/projector_graphics.inc"
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;.include "common_sprites.inc"
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.include "graphics_sprites/pointer_sprites.inc"
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.include "leveldata_projector.inc"
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.include "disk39_files/leveldata_projector.inc"
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@ -1,767 +0,0 @@
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; Loader for DUKE
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.include "zp.inc"
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.include "hardware.inc"
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.include "common_defines.inc"
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nibtbl = $300 ; nothing uses the bottom 128 bytes of $300, do they?
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bit2tbl = $380 ; bit2tbl: .res 86 ; = nibtbl+128
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filbuf = $3D6 ; filbuf: .res 4 ; = bit2tbl+86
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; read any file slot 6 version
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; based on FASTLD6 and RTS copyright (c) Peter Ferrie 2011-2013,2018
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; modified to assembled with ca65 -- vmw
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; added code to patch it to run from current disk slot -- vmw
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; WHICH_LOAD = $7E ; thing to load
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; adrlo = $26 ; constant from boot prom
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; adrhi = $27 ; constant from boot prom
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; tmpsec = $3c ; constant from boot prom
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; reqsec = $3d ; constant from boot prom
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; sizelo = $44
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; sizehi = $45
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; secsize = $46
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; namlo = $f8
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; namhi = $f9
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; TEMPY = $fa
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; step = $fd ; state for stepper motor
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; tmptrk = $fe ; temporary copy of current track
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; phase = $ff ; current phase for /seek
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; OUTL = $fe ; for picking filename
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; OUTH = $ff
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dirbuf = $c00
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; note, don't put this immediately below
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; the value being read as destaddr-4
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; is temporarily overwritten during read
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; process
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FILENAME = $280
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;===================================================
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;===================================================
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; START / INIT
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;===================================================
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;===================================================
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loader_start:
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jsr hardware_detect
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lda #<model_string
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sta OUTL
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lda #>model_string
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sta OUTH
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lda APPLEII_MODEL
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sta model_string+17
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cmp #'g'
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bne go_print
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lda #'s'
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sta model_string+18
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go_print:
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ldy #0
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print_model:
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lda (OUTL),Y
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beq print_model_done
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ora #$80
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sta $7d0,Y
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iny
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jmp print_model
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print_model_done:
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lda #LOAD_TITLE
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sta WHICH_LOAD
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jsr init ; unhook DOS, init nibble table
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;===================================================
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;===================================================
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; SETUP THE FILENAME
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;===================================================
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;===================================================
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which_load_loop:
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; update the which-file error message
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; lda WHICH_LOAD
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; tay
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; lda which_disk,Y
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; sta error_string+19
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; lda WHICH_LOAD
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; cmp #2
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; bcc skip_engine_load
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;engine_load:
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;
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; lda #<engine_filename
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; sta OUTL
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; lda #>engine_filename
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; sta OUTH
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; jsr opendir_filename
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skip_engine_load:
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lda WHICH_LOAD
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asl
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tay
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lda filenames,Y
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sta OUTL
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lda filenames+1,Y
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sta OUTH
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; lda WHICH_LOAD
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; bne load_other
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load_intro:
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lda #<$4000
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sta entry_smc+1
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lda #>$4000
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sta entry_smc+2
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; jmp actual_load
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;load_other:
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; lda #<$2000
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; sta entry_smc+1
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; lda #>$2000
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; sta entry_smc+2
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actual_load:
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;===================================================
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;===================================================
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; SET UP DOS3.3 FILENAME
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;===================================================
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;===================================================
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load_file_and_execute:
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jsr opendir_filename
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entry_smc:
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jsr $1000 ; jump to common entry point
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; hope they updated the WHICH_LOAD value
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jmp which_load_loop
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;==============================
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; setup filename then open/load
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opendir_filename:
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; clear out the filename with $A0 (space)
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lda #<FILENAME
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sta namlo
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lda #>FILENAME
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sta namhi
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ldy #29
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wipe_filename_loop:
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lda #$A0
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sta (namlo),Y
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dey
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bpl wipe_filename_loop
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ldy #0
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copy_filename_loop:
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lda (OUTL),Y
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beq copy_filename_done
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ora #$80
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sta (namlo),Y
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iny
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bne copy_filename_loop
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copy_filename_done:
|
||||
jsr opendir ; open and read entire file into memory
|
||||
|
||||
rts
|
||||
|
||||
filenames:
|
||||
.word title_filename
|
||||
.word outside_filename
|
||||
.word projector_filename
|
||||
.word magsteps_filename
|
||||
.word maglev_filename
|
||||
.word movie1_filename
|
||||
.word movie2_filename
|
||||
|
||||
title_filename:
|
||||
.byte "TITLE",0
|
||||
outside_filename:
|
||||
.byte "LEVEL_OUTSIDE",0
|
||||
projector_filename:
|
||||
.byte "LEVEL_PROJECTOR",0
|
||||
magsteps_filename:
|
||||
.byte "LEVEL_MAGSTEPS",0
|
||||
maglev_filename:
|
||||
.byte "LEVEL_MAGLEV",0
|
||||
movie1_filename:
|
||||
.byte "MOVIE1",0
|
||||
movie2_filename:
|
||||
.byte "MOVIE2",0
|
||||
|
||||
;===================================================
|
||||
;===================================================
|
||||
; INIT (build nibble table)
|
||||
;===================================================
|
||||
;===================================================
|
||||
|
||||
;unhook DOS and build nibble table
|
||||
|
||||
init:
|
||||
; patch to use current drive
|
||||
|
||||
; locate input paramater list
|
||||
jsr $3E3
|
||||
; result is in A:Y
|
||||
sta $FF
|
||||
sty $FE
|
||||
ldy #1
|
||||
lda ($FE),y
|
||||
|
||||
; list+1 should have slot<<8
|
||||
|
||||
|
||||
ora #$80 ; add in $80
|
||||
|
||||
; c0e0
|
||||
sta mlsmc06+1
|
||||
|
||||
; c0e8
|
||||
clc
|
||||
adc #8
|
||||
sta mlsmc02+1
|
||||
sta mlsmc07+1
|
||||
|
||||
; c0e9
|
||||
clc
|
||||
adc #1
|
||||
sta mlsmc01+1
|
||||
|
||||
; c0ec
|
||||
clc
|
||||
adc #3
|
||||
sta mlsmc03+1
|
||||
sta mlsmc04+1
|
||||
sta mlsmc05+1
|
||||
|
||||
jsr $fe93 ; clear COUT
|
||||
jsr $fe89 ; clear KEYIN
|
||||
|
||||
;========================
|
||||
; Create nibble table
|
||||
; Note: the table starts 16 bytes in, and is sparse
|
||||
; so it doesn't entirely look like the DOS33 table at
|
||||
|
||||
ldy #0
|
||||
ldx #3
|
||||
L1: stx $3c ; store tempx (3?)
|
||||
txa ; a=x (a=3)
|
||||
asl ; a*=2 (a=6)
|
||||
bit $3c ; a&tempx, set N/V (a=6)
|
||||
beq L3 ; if 0, skip to L3
|
||||
ora $3c ; a|=tempx (a=7)
|
||||
eor #$ff ; a=~a (a=f8)
|
||||
and #$7e ; a&=0x7e 0111 1110 (a=78)
|
||||
L2: bcs L3 ; this set way back at asl??
|
||||
lsr ; a>>1 a=3c c=0
|
||||
; a=1e c=0
|
||||
; a=0f c=0
|
||||
; a=07 c=1
|
||||
bne L2 ; if a!=0 goto l2
|
||||
tya ; if a==0, a=y
|
||||
sta nibtbl, x ; write out to table
|
||||
iny ; increment y
|
||||
L3: inx ; increment x x=4, a=0f
|
||||
bpl L1 ; loop while high bit not set
|
||||
|
||||
rts
|
||||
|
||||
|
||||
;===================================================
|
||||
;===================================================
|
||||
; file not found
|
||||
;===================================================
|
||||
;===================================================
|
||||
|
||||
file_not_found:
|
||||
|
||||
mlsmc07:lda $c0e8 ; turn off drive motor?
|
||||
|
||||
jsr TEXT
|
||||
jsr HOME
|
||||
|
||||
ldy #0
|
||||
|
||||
lda #<error_string
|
||||
sta OUTL
|
||||
lda #>error_string
|
||||
sta OUTH
|
||||
|
||||
quick_print:
|
||||
lda (OUTL),Y
|
||||
beq quick_print_done
|
||||
jsr COUT1
|
||||
iny
|
||||
; jmp quick_print
|
||||
|
||||
quick_print_done:
|
||||
rts
|
||||
|
||||
; jsr quick_print
|
||||
|
||||
fnf_keypress:
|
||||
lda KEYPRESS
|
||||
bpl fnf_keypress
|
||||
bit KEYRESET
|
||||
|
||||
jmp which_load_loop
|
||||
|
||||
; offset for disk number is 19
|
||||
error_string:
|
||||
.byte "PLEASE INSERT DISK 1, PRESS RETURN",0
|
||||
|
||||
model_string:
|
||||
.byte "DETECTED APPLE II",0,0,0
|
||||
|
||||
|
||||
|
||||
|
||||
;===================================================
|
||||
;===================================================
|
||||
; OPENDIR: actually load the file
|
||||
;===================================================
|
||||
;===================================================
|
||||
|
||||
; turn on drive and read volume table of contents
|
||||
opendir:
|
||||
mlsmc01:lda $c0e9 ; turn slot#6 drive on
|
||||
ldx #0
|
||||
stx adrlo ; zero out adrlo
|
||||
stx secsize ; zero out secsize
|
||||
lda #$11 ; a=$11 (VTOC)
|
||||
jsr readdirsec
|
||||
firstent:
|
||||
|
||||
lda dirbuf+1
|
||||
|
||||
; lock if entry not found
|
||||
entry_not_found:
|
||||
beq file_not_found
|
||||
|
||||
; read directory sector
|
||||
|
||||
ldx dirbuf+2
|
||||
jsr seekread1
|
||||
ldy #7 ;number of directory entries in a sector
|
||||
ldx #$2b ;offset of filename in directory entry
|
||||
nextent:
|
||||
tya
|
||||
pha ; was **phy**
|
||||
txa
|
||||
pha ; was **phx**
|
||||
ldy #$1d
|
||||
|
||||
; match name backwards (slower but smaller)
|
||||
|
||||
L4:
|
||||
lda (namlo), y
|
||||
cmp dirbuf, x
|
||||
beq foundname
|
||||
pla
|
||||
|
||||
; move to next directory in this block, if possible
|
||||
|
||||
clc
|
||||
adc #$23
|
||||
tax
|
||||
pla
|
||||
tay ; was **ply**
|
||||
dey
|
||||
bne nextent
|
||||
beq firstent ; was **bra**
|
||||
|
||||
foundname:
|
||||
dex
|
||||
dey
|
||||
bpl L4
|
||||
pla
|
||||
tay ; was **ply**
|
||||
pla
|
||||
|
||||
; read track/sector list
|
||||
|
||||
lda dirbuf-32, y
|
||||
ldx dirbuf-31, y
|
||||
jsr seekread1
|
||||
|
||||
; read load offset and length info only, initially
|
||||
|
||||
lda #<filbuf
|
||||
sta adrlo
|
||||
lda #4
|
||||
sta secsize
|
||||
lda dirbuf+12
|
||||
ldx dirbuf+13
|
||||
ldy #>filbuf
|
||||
jsr seekread
|
||||
|
||||
; reduce load offset by 4, to account for offset and length
|
||||
|
||||
sec
|
||||
lda filbuf
|
||||
sbc #4
|
||||
sta adrlo
|
||||
|
||||
lda filbuf+1
|
||||
sbc #0
|
||||
sta adrhi
|
||||
|
||||
; save on stack bytes that will be overwritten by extra read
|
||||
|
||||
ldy #3
|
||||
L5:
|
||||
lda (adrlo), y
|
||||
pha
|
||||
dey
|
||||
bpl L5
|
||||
|
||||
lda adrhi
|
||||
pha
|
||||
lda adrlo
|
||||
pha
|
||||
|
||||
; increase load size by 4, to account for offst and length
|
||||
|
||||
lda filbuf+2
|
||||
adc #3
|
||||
sta sizelo
|
||||
sta secsize
|
||||
|
||||
lda filbuf+3
|
||||
adc #0
|
||||
sta sizehi
|
||||
beq readfirst
|
||||
lda #0 ; was **stz secsize**
|
||||
sta secsize
|
||||
|
||||
readfirst:
|
||||
ldy #$0c
|
||||
|
||||
; read a file sector
|
||||
|
||||
readnext:
|
||||
tya
|
||||
pha
|
||||
lda dirbuf, y ; A = track
|
||||
ldx dirbuf+1, y ; x = sector
|
||||
jsr seekread1
|
||||
pla
|
||||
tay
|
||||
|
||||
; if low count is non-zero then we are done
|
||||
; (can happen only for partial last block)
|
||||
|
||||
lda secsize
|
||||
bne readdone
|
||||
|
||||
; continue if more than $100 bytes left
|
||||
|
||||
dec sizehi
|
||||
bne L6
|
||||
|
||||
; set read size to min(length, $100)
|
||||
|
||||
lda sizelo
|
||||
beq readdone
|
||||
sta secsize
|
||||
L6:
|
||||
inc adrhi
|
||||
iny
|
||||
iny
|
||||
bne readnext
|
||||
|
||||
; save current address for after t/s read
|
||||
|
||||
lda adrhi
|
||||
pha
|
||||
lda adrlo
|
||||
pha
|
||||
lda #0
|
||||
sta adrlo ; was **stz adrlo**
|
||||
|
||||
; read next track/sector sector
|
||||
|
||||
lda dirbuf+1
|
||||
ldx dirbuf+2
|
||||
jsr readdirsec
|
||||
clc
|
||||
|
||||
; restore current address
|
||||
readdone:
|
||||
pla
|
||||
sta adrlo ; code originally had this backwards
|
||||
pla
|
||||
sta adrhi
|
||||
bcc readfirst
|
||||
|
||||
mlsmc02:lda $c0e8
|
||||
|
||||
; restore from stack bytes that were overwritten by extra read
|
||||
|
||||
ldx #3
|
||||
ldy #0
|
||||
L7:
|
||||
pla
|
||||
sta (adrlo), y
|
||||
iny
|
||||
dex
|
||||
bpl L7
|
||||
rts
|
||||
|
||||
|
||||
;======================
|
||||
; readdirsec
|
||||
;======================
|
||||
; a = track?
|
||||
; x = sector?
|
||||
readdirsec:
|
||||
ldy #>dirbuf
|
||||
seekread:
|
||||
sty adrhi
|
||||
seekread1:
|
||||
sta phase
|
||||
lda sectbl, x
|
||||
sta reqsec
|
||||
jsr readadr
|
||||
|
||||
; if track does not match, then seek
|
||||
|
||||
cpx phase
|
||||
beq checksec
|
||||
jsr seek
|
||||
|
||||
|
||||
;=========================================
|
||||
; re merge in with qkumba's recent changes
|
||||
; to fix seek problem?
|
||||
;=========================================
|
||||
|
||||
; [re-]read sector
|
||||
|
||||
re_read_addr:
|
||||
jsr readadr
|
||||
checksec:
|
||||
cmp reqsec
|
||||
bne re_read_addr
|
||||
|
||||
;=========================
|
||||
; read sector data
|
||||
;=========================
|
||||
|
||||
readdata:
|
||||
jsr readd5aa
|
||||
eor #$ad ; zero A if match
|
||||
bne re_read_addr
|
||||
|
||||
L12:
|
||||
mlsmc03:ldx $c0ec ; read until valid data (high bit set)
|
||||
bpl L12
|
||||
eor nibtbl-$80, x
|
||||
sta bit2tbl-$aa, y
|
||||
iny
|
||||
bne L12
|
||||
L13:
|
||||
mlsmc04:ldx $c0ec ; read until valid data (high bit set)
|
||||
bpl L13
|
||||
eor nibtbl-$80, x
|
||||
sta (adrlo), y ; the real address
|
||||
iny
|
||||
cpy secsize
|
||||
bne L13
|
||||
ldy #0
|
||||
L14:
|
||||
ldx #$a9
|
||||
L15:
|
||||
inx
|
||||
beq L14
|
||||
lda (adrlo), y
|
||||
lsr bit2tbl-$aa, x
|
||||
rol
|
||||
lsr bit2tbl-$aa, x
|
||||
rol
|
||||
sta (adrlo), y
|
||||
iny
|
||||
cpy secsize
|
||||
bne L15
|
||||
rts
|
||||
|
||||
; no tricks here, just the regular stuff
|
||||
|
||||
;=======================
|
||||
; readaddr -- read the address field
|
||||
;=======================
|
||||
; Find address field, put track in cutrk, sector in tmpsec
|
||||
|
||||
readadr:
|
||||
jsr readd5aa
|
||||
cmp #$96
|
||||
bne readadr
|
||||
ldy #3 ; three?
|
||||
; first read volume/volume
|
||||
; then track/track
|
||||
; then sector/sector?
|
||||
adr_read_two_bytes:
|
||||
tax
|
||||
jsr readnib
|
||||
rol
|
||||
sta tmpsec
|
||||
jsr readnib
|
||||
and tmpsec
|
||||
dey
|
||||
bne adr_read_two_bytes
|
||||
rts
|
||||
|
||||
;========================
|
||||
; make sure we see the $D5 $AA pattern
|
||||
|
||||
readd5aa:
|
||||
L16:
|
||||
jsr readnib
|
||||
L17:
|
||||
cmp #$d5
|
||||
bne L16
|
||||
jsr readnib
|
||||
cmp #$aa
|
||||
bne L17
|
||||
tay ; we need Y=#$AA later
|
||||
|
||||
readnib:
|
||||
mlsmc05:lda $c0ec ; read until valid (high bit set)
|
||||
bpl readnib
|
||||
|
||||
seekret:
|
||||
rts
|
||||
|
||||
;=====================
|
||||
; SEEK
|
||||
;=====================
|
||||
; current track in X?
|
||||
; desired track in phase
|
||||
|
||||
seek:
|
||||
ldy #0
|
||||
sty step
|
||||
asl phase ; multiply by two
|
||||
txa ; current track?
|
||||
asl ; mul by two
|
||||
copy_cur:
|
||||
tax
|
||||
sta tmptrk
|
||||
sec
|
||||
sbc phase
|
||||
beq L22
|
||||
bcs L18
|
||||
eor #$ff
|
||||
inx
|
||||
bcc L19
|
||||
L18:
|
||||
sbc #1
|
||||
dex
|
||||
L19:
|
||||
cmp step
|
||||
bcc L20
|
||||
lda step
|
||||
L20:
|
||||
cmp #8
|
||||
bcs L21
|
||||
tay
|
||||
sec
|
||||
L21:
|
||||
txa
|
||||
pha
|
||||
ldx step1, y
|
||||
L22:
|
||||
php
|
||||
bne L24
|
||||
L23:
|
||||
clc
|
||||
lda tmptrk
|
||||
ldx step2, y
|
||||
L24:
|
||||
stx tmpsec
|
||||
and #3
|
||||
rol
|
||||
tax
|
||||
lsr
|
||||
mlsmc06:lda $c0e0, x
|
||||
L25:
|
||||
ldx #$12
|
||||
L26:
|
||||
dex
|
||||
bpl L26
|
||||
dec tmpsec
|
||||
bne L25
|
||||
bcs L23
|
||||
plp
|
||||
beq seekret
|
||||
pla
|
||||
inc step
|
||||
bne copy_cur
|
||||
|
||||
|
||||
|
||||
step1: .byte $01, $30, $28, $24, $20, $1e, $1d, $1c
|
||||
step2: .byte $70, $2c, $26, $22, $1f, $1e, $1d, $1c
|
||||
|
||||
sectbl: .byte $00,$0d,$0b,$09,$07,$05,$03,$01,$0e,$0c,$0a,$08,$06,$04,$02,$0f
|
||||
|
||||
|
||||
.include "hardware_detect.s"
|
||||
|
||||
; From $BA96 of DOS33
|
||||
;nibtbl: .res 128 ; = *
|
||||
; .byte $00,$01,$98,$99,$02,$03,$9C,$04 ; $BA96 ; 00
|
||||
; .byte $05,$06,$A0,$A1,$A2,$A4,$A4,$A5 ; $BA9E ; 08
|
||||
; .byte $07,$08,$A8,$A9,$AA,$09,$0A,$0B ; $BAA6 ; 10
|
||||
; .byte $0C,$0D,$B0,$B1,$0E,$0F,$10,$11 ; $BAAE ; 18
|
||||
; .byte $12,$13,$B8,$14,$15,$16,$17,$18 ; $BAB6 ; 20
|
||||
; .byte $19,$1A,$C0,$C1,$C2,$C3,$C4,$C5 ; $BABE ; 28
|
||||
; .byte $C6,$C7,$C8,$C9,$CA,$1B,$CC,$1C ; $BAC6 ; 30
|
||||
; .byte $1D,$1E,$D0,$D1,$D2,$1E,$D4,$D5 ; $BACE ; 38
|
||||
; .byte $20,$21,$D8,$22,$23,$24,$25,$26 ; $BAD6 ; 40
|
||||
; .byte $27,$28,$E0,$E1,$E2,$E3,$E4,$29 ; $BADE ; 48
|
||||
; .byte $2A,$2B,$E8,$2C,$2D,$2E,$2F,$30 ; $BAE6 ; 50
|
||||
; .byte $31,$32,$F0,$F1,$33,$34,$35,$36 ; $BAEE ; 58
|
||||
; .byte $37,$38,$F8,$39,$3A,$3B,$3C,$3D ; $BAF6 ; 60
|
||||
; .byte $3E,$3F,$13,$00,$01,$02,$01,$00 ; $BAFE ; 68
|
||||
; .byte $00,$00,$00,$00,$00,$00,$00,$00
|
||||
; .byte $00,$00,$00,$00,$00,$00,$00,$00
|
||||
|
||||
|
||||
;bit2tbl: .res 86 ; = nibtbl+128
|
||||
;filbuf: .res 4 ; = bit2tbl+86
|
||||
|
||||
|
||||
;dataend = filbuf+4
|
||||
|
||||
|
||||
loader_end:
|
||||
|
||||
.assert (<loader_end - <loader_start)>16, error, "loader too big"
|
||||
Loading…
Reference in New Issue
Block a user