lemm: was too big, load with qboot
bit of a hack but seems to work
This commit is contained in:
Vince Weaver
parent
62ce6377fb
commit
7e9b9e90f2
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@ -7,14 +7,41 @@ PNG2GR = ../../utils/gr-utils/png2gr
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LZSA = ~/research/lzsa/lzsa/lzsa
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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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LINKER_SCRIPTS = ../../linker_scripts
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all: lemm.dsk
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lemm.dsk: HELLO LEMM LEMM_TEST
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#lemm.dsk: HELLO LEMM LEMM_TEST
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# cp $(EMPTY_DISK) lemm.dsk
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# $(DOS33) -y lemm.dsk SAVE A HELLO
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# $(DOS33) -y lemm.dsk BSAVE -a 0x6000 LEMM
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# $(DOS33) -y lemm.dsk BSAVE -a 0x4000 LEMM_TEST
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lemm.dsk: QBOOT QLOAD LEMM LEMM
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cp $(EMPTY_DISK) lemm.dsk
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$(DOS33) -y lemm.dsk SAVE A HELLO
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$(DOS33) -y lemm.dsk BSAVE -a 0x6000 LEMM
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$(DOS33) -y lemm.dsk BSAVE -a 0x4000 LEMM_TEST
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$(DOS33_RAW) lemm.dsk 0 0 QBOOT 0 1
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$(DOS33_RAW) lemm.dsk 0 2 QBOOT 1 1
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$(DOS33_RAW) lemm.dsk 0 4 QBOOT 2 1
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$(DOS33_RAW) lemm.dsk 1 0 QLOAD 0 0
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$(DOS33_RAW) lemm.dsk 3 0 LEMM 0 0
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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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@ -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 +1,363 @@
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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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.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 $AA
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cmp #$aa
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bne inner_read
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; look for $D5 $AA $AD
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tay ; we need Y=#$AA later
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jsr readnib
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eor #$ad ; zero A if match
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beq check_mode
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; if not #$AD, then #$96 is assumed
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; so in address field
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ldy #2 ; volume, track, sector
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another:
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jsr readnib
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rol ; set carry
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sta sector+1
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jsr readnib
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and sector+1
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dey
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bpl another
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tay
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ldx addrtbl, Y ; fetch corresponding address
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beq read ; done?
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sta sector+1 ; store index for later
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stx adrpatch1+2
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stx adrpatch8+2
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stx adrpatch2+2
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stx adrpatch3+2
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stx adrpatch5+2
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stx adrpatch7+2
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inx
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stx adrpatch9+2
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dex
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dex
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stx adrpatch4+2
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stx adrpatch6+2
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ldy #$fe
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loop2:
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adrpatch1:
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lda $d102, Y
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pha
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iny
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bne loop2
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branch_read:
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bcs read ; branch always
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check_mode:
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cpx #0
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beq read ; loop if not expecting #$AD
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loop33:
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sta tmpval+1 ; zero rolling checksum
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slotpatch2:
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loop4:
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ldx $c0d1
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bpl loop4
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lda preshift-$96, X
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adrpatch2:
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sta $d102, Y ; store 2-bit array
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tmpval:
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eor #$d1
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iny
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bne loop33
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ldy #$aa
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slotpatch3:
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loop5:
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ldx $c0d1
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bpl loop5
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eor preshift-$96, X
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adrpatch3:
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ldx $d102, Y ; bit2tbl
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eor grouped+2, X ; first 86 nibbles use group bits 0-1
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adrpatch4:
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sta $d156, y
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iny
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bne loop5
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and #$fc
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ldy #$aa
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slotpatch4:
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loop6:
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ldx $c0d1
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bpl loop6
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eor preshift-$96, X
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adrpatch5:
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ldx $d102, Y ; bit2tbl
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eor grouped+1, X ; second 86 nibbles use group bits 2-3
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adrpatch6:
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sta $d1ac, Y
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iny
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bne loop6
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and #$fc
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ldx #$ac
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slotpatch5:
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loop7:
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ldy $c0d1
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bpl loop7
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eor preshift-$96, Y
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adrpatch7:
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ldy $d100, X ; bit2tbl
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eor grouped, Y ; last 84 nibbles use group bits 4-5
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adrpatch8:
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sta $d100, x
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inx
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bne loop7
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and #$fc
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slotpatch6:
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loop8:
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ldy $c0d1
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bpl loop8
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eor preshift-$96, Y
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cmp #1 ; carry = !zero
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ldy #1
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loop9:
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pla
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adrpatch9:
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sta $d100, Y
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dey
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bpl loop9
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branch_read2:
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bcs branch_read ; branch if checksum failure
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sector:
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ldy #$d1
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txa
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sta addrtbl, Y ; zero corresponding address
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dec total+1
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dec partial2 ; adjust remaining count
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; (faster than looping over array)
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sec
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bne branch_read2 ; read all requested sectors in one track
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sta startsec+1 ; this was missing from original code
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; leading to trouble on wrap around
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; it not starting at sector0
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total:
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ldx #$d1
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beq driveoff
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inc phase+1
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inc phase+1 ; update current track
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jmp inittrk
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driveoff:
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slotpatch7:
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lda $c0d1
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seekret:
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rts
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seek:
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ldx #0
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stx step+1
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copy_cur:
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curtrk:
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lda #0
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sta tmpval+1
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sec
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phase:
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sbc #$d1
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beq seekret
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; if seek backwards
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bcs sback
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eor #$ff
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inc curtrk+1
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bcc ssback
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sback:
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adc #$fe
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dec curtrk+1
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ssback:
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cmp step+1
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bcc loop10
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step:
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lda #$d1
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loop10:
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cmp #8
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bcs loop11
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tay
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sec
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||||
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
|
||||
|
||||
|
|
@ -0,0 +1,250 @@
|
|||
; Loader for MIST
|
||||
|
||||
.include "zp.inc"
|
||||
.include "hardware.inc"
|
||||
|
||||
;.include "common_defines.inc"
|
||||
.include "qboot.inc"
|
||||
|
||||
LOAD_TEXT_TITLE = 0
|
||||
|
||||
qload_start:
|
||||
|
||||
; init the write code
|
||||
; lda WHICH_SLOT
|
||||
; jsr popwr_init
|
||||
|
||||
; first time entry
|
||||
; start by loading text title
|
||||
|
||||
lda #LOAD_TEXT_TITLE ; load title
|
||||
sta WHICH_LOAD
|
||||
|
||||
lda #1
|
||||
sta CURRENT_DISK ; current disk number
|
||||
|
||||
jsr load_file
|
||||
|
||||
jsr $6000
|
||||
.if 0
|
||||
lda #LOAD_TITLE ; load title
|
||||
sta WHICH_LOAD
|
||||
|
||||
main_game_loop:
|
||||
jsr load_file
|
||||
|
||||
lda WHICH_LOAD
|
||||
bne not_title
|
||||
|
||||
start_title:
|
||||
jsr $4000
|
||||
jmp main_game_loop
|
||||
|
||||
not_title:
|
||||
jsr $2000
|
||||
jmp main_game_loop
|
||||
.endif
|
||||
|
||||
;====================================
|
||||
; 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 1,1,3,3 ; MIST_TITLE,MIST,MECHE,SELENA
|
||||
.byte 1,1,3,2 ; OCTAGON,VIEWER,STONEY,CHANNEL
|
||||
.byte 2,1,2,2 ; CABIN,DENTIST,ARBOR,NIBEL
|
||||
.byte 1,1,1,3 ; SHIP,GENERATOR,D'NI,SUB
|
||||
.byte 1 ; TEXT_TITLE
|
||||
.byte 1,1,1,1,1 ; SAVE1,SAVE2,SAVE3,SAVE4,SAVE5
|
||||
.byte $f ; FIRST_SECTOR
|
||||
|
||||
load_address_array:
|
||||
.byte $60,$20,$20,$20 ; MIST_TITLE,MIST,MECHE,SELENA
|
||||
.byte $20,$20,$20,$20 ; OCTAGON,VIEWER,STONEY,CHANNEL
|
||||
.byte $20,$20,$20,$20 ; CABIN,DENTIST,ARBOR,NIBEL
|
||||
.byte $20,$20,$20,$20 ; SHIP,GENERATOR,D'NI,SUB
|
||||
.byte $08 ; TEXT_TITLE
|
||||
.byte $0E,$0E,$0E,$0E
|
||||
.byte $0E ; SAVE1,SAVE2,SAVE3,SAVE4,SAVE5
|
||||
.byte $0C ; FIRST_SECTOR
|
||||
|
||||
track_array:
|
||||
.byte 3, 8, 1,21 ; MIST_TITLE,MIST,MECHE,SELENA
|
||||
.byte 18,31,11, 1 ; OCTAGON,VIEWER,STONEY,CHANNEL
|
||||
.byte 27,26,10,20 ; CABIN,DENTIST,ARBOR,NIBEL
|
||||
.byte 30,32,28,30 ; SHIP,GENERATOR,D'NI,SUB
|
||||
.byte 0 ; TEXT_TITLE
|
||||
.byte 0, 0, 0, 0, 0 ; SAVE1,SAVE2,SAVE3,SAVE4,SAVE5
|
||||
.byte 0 ; FIRST_SECTOR
|
||||
|
||||
sector_array:
|
||||
.byte 0, 0, 0, 0 ; MIST_TITLE,MIST,MECHE,SELENA
|
||||
.byte 0, 8, 0, 0 ; OCTAGON,VIEWER,STONEY,CHANNEL
|
||||
.byte 0, 0, 0, 0 ; CABIN,DENTIST,ARBOR,NIBEL
|
||||
.byte 0,13, 0, 1 ; SHIP,GENERATOR,D'NI,SUB
|
||||
.byte 6 ; TEXT_TITLE
|
||||
.byte 11,12,13,14,15 ; SAVE1,SAVE2,SAVE3,SAVE4,SAVE5
|
||||
.byte 0 ; FIRST_SECTOR
|
||||
|
||||
length_array:
|
||||
.byte 88,159,157,145 ; MIST_TITLE,MIST,MECHE,SELENA
|
||||
.byte 128, 20,158,135 ; OCTAGON,VIEWER,STONEY,CHANNEL
|
||||
.byte 61, 31,159,109 ; CABIN,DENTIST,ARBOR,NIBEL
|
||||
.byte 20, 33, 27, 78 ; SHIP,GENERATOR,D'NI,SUB
|
||||
.byte 3 ; TEXT_TITLE
|
||||
.byte 1,1,1,1,1 ; SAVE1,SAVE2,SAVE3,SAVE4,SAVE5
|
||||
.byte 1 ; FIRST_SECTOR
|
||||
|
||||
; .include "audio.s"
|
||||
; .include "linking_noise.s"
|
||||
; .include "decompress_fast_v2.s"
|
||||
; .include "draw_pointer.s"
|
||||
; .include "end_level.s"
|
||||
; .include "gr_copy.s"
|
||||
; .include "gr_fast_clear.s"
|
||||
; .include "gr_offsets.s"
|
||||
; .include "gr_pageflip.s"
|
||||
; .include "gr_putsprite_crop.s"
|
||||
; .include "keyboard.s"
|
||||
; .include "text_print.s"
|
||||
; .include "loadstore.s"
|
||||
; .include "joystick.s"
|
||||
|
||||
; .include "page_sprites.inc"
|
||||
; .include "common_sprites.inc"
|
||||
|
||||
; .include "qkumba_popwr.s"
|
||||
|
||||
qload_end:
|
||||
|
||||
.assert (>qload_end - >qload_start) < $e , error, "loader too big"
|
||||
|
|
@ -2,6 +2,7 @@
|
|||
|
||||
;; LZSA addresses
|
||||
NIBCOUNT = $00
|
||||
WHICH_LOAD = $01
|
||||
|
||||
;; Zero page monitor routines addresses
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue