mist: start adding qkumba's write routines
though hit a roadblock because I have no idea what they are doing
This commit is contained in:
Vince Weaver
parent
4b00599b54
commit
1de2b95073
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@ -54,7 +54,8 @@ LOADER: loader.o
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loader.o: loader.s \
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gr_copy.s gr_offsets.s gr_pageflip.s gr_putsprite_crop.s \
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text_print.s gr_fast_clear.s decompress_fast_v2.s \
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keyboard.s draw_pointer.s end_level.s audio.s loadstore.s
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keyboard.s draw_pointer.s end_level.s audio.s loadstore.s \
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qkumba_popwr.s
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ca65 -o loader.o loader.s -l loader.lst
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###
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@ -5,50 +5,50 @@
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opendir_filename =$1042
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; linking_noise.s
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play_link_noise =$147a
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play_link_noise =$1590
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; decompress_fast_v2.s
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decompress_lzsa2_fast =$1496
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getsrc_smc =$158c
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decompress_lzsa2_fast =$15ac
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getsrc_smc =$16a2
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; draw_pointer.s
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draw_pointer =$1599
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draw_pointer =$16af
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; end_level.s
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end_level =$1707
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end_level =$181d
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; gr_copy.s
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gr_copy_to_current =$1729
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gr_copy_to_current =$183f
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; gr_fast_clear.s
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clear_bottom =$184f
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clear_all =$188d
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clear_all_color =$18b2
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clear_bottom =$1965
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clear_all =$19a3
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clear_all_color =$19c8
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; gr_offsets.s
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gr_offsets =$18d0
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gr_offsets =$19e6
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; gr_page_flip.s
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page_flip =$1900
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page_flip =$1a16
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; gr_putsprite_crop.s
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put_sprite_crop =$191a
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psc_smc1 =$193d
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psc_smc2 =$19d5
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put_sprite_crop =$1a30
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psc_smc1 =$1a53
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psc_smc2 =$1aeb
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; keyboard.s
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handle_keypress =$1a56
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change_direction =$1b1a
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change_location =$1b53
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handle_keypress =$1b6c
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change_direction =$1c30
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change_location =$1c69
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; text_print.s
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move_and_print =$1beb
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ps_smc1 =$1c18
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move_and_print =$1d01
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ps_smc1 =$1d2e
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; page_sprites.inc
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blue_page_sprite =$1d00
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red_page_sprite =$1d16
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white_page_sprite =$1d2c
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blue_page_small_sprite =$1d42
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red_page_small_sprite =$1d4a
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blue_page_sprite =$1e16
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red_page_sprite =$1e2c
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white_page_sprite =$1e42
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blue_page_small_sprite =$1e58
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red_page_small_sprite =$1e60
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@ -49,6 +49,7 @@ filbuf = $3D6 ; filbuf: .res 4 ; = bit2tbl+86
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;===================================================
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loader_start:
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lda #LOAD_TITLE
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sta WHICH_LOAD
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@ -742,6 +743,7 @@ sectbl: .byte $00,$0d,$0b,$09,$07,$05,$03,$01,$0e,$0c,$0a,$08,$06,$04,$02,$0f
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;filbuf: .res 4 ; = bit2tbl+86
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;dataend = filbuf+4
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.include "qkumba_popwr.s"
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@ -0,0 +1,209 @@
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; popwr -- code provided by qkumba
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; !cpu 6502
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; !to "popwr",plain
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; *=$d500
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;bit2tbl=$dc00 ; in loader.s
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encbuf=$e00
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frombuff=$d00
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popwr:
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lda #$60
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and #$70 ; the slot number is in the top here
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sta slotpatchw1+1 ; self modify the code
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sta slotpatchw2+1
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sta slotpatchw3+1
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sta slotpatchw4+1
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; convert the input to nibbles?
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ldy #2 ; why start at 2?
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aa:
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ldx #$aa
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b1:
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dey
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frombuff_smc:
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lda frombuff, y
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lsr
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rol bit2tbl-$aa, x
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lsr
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rol bit2tbl-$aa, x
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sta encbuf, y
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lda bit2tbl-$aa, x
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and #$3f
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sta bit2tbl-$aa, x
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inx
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bne b1
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tya
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bne aa
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; look for the proper sector to write
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cmpsecwr:
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b2:
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jsr readd5aa ; look for dd55aa marker
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cmp #$96
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bne b2
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ldy #3 ; try getting the sector number
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b3:
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jsr readnib
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rol
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sta tmpsec
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jsr readnib
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and tmpsec ; and with prev nibble?
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dey
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bne b3
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;reqsec:
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tay
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bne cmpsecwr ; retry if not what we want?
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;skip tail #$DE #$AA #$EB some #$FFs ...
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ldy #$24
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b4:
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dey
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bpl b4
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; c0e0 slot 6 ph0 off
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; c0e1 slot 6 ph0 on
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; c0e2 slot 6 ph1 off
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; c0e3 slot 6 ph1 on
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; c0e4 slot 6 ph2 off
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; c0e5 slot 6 ph2 on
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; c0e6 slot 6 ph3 off
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; c0e7 slot 6 ph3 on
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; c0e8 slot 6 motor off
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; c0e9 slot 6 motor on
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; c0ea slot 6 drive 1
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; c0eb slot 6 drive 2
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; c0ec slot 6 q6 off read
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; c0ed slot 6 q6 on wp sense
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; c0ee slot 6 q7 off read/wp sense
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; c0ef slot 6 q7 on write
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; write sector data
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slotpatchw1:
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ldx #$d1
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lda $c08d, x ; prime drive ; c0ed if X=$60
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lda $c08e, x ; required by Unidisk ; c0ee
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tya
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sta $c08f, x ; c0ef write
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ora $c08c, x ; c0ec read?
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;40 cycles
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ldy #4 ; 2 cycles
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cmp $ea ; 3 cycles
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cmp ($ea,x) ; 6 cycles
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b5:
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jsr writenib1 ; (29 cycles)
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; +6 cycles
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dey ; 2 cycles
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bne b5 ; 3 cycles if taken, 2 if not
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; 36 cycles
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; +10 cycles
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ldy #(prolog_e-prolog)
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; 2 cycles
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cmp $ea ; 3 cycles
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b6:
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lda prolog-1, y ; 4 cycles
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jsr writenib3 ; (17 cycles)
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; 32 cycles if branch taken
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; +6 cycles
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dey ; 2 cycles
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bne b6 ; 3 cycles if taken, 2 if not
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;36 cycles on first pass
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;+10 cycles
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tya ;2 cycles
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ldy #$56 ;2 cycles
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b7: eor bit2tbl-1, y ;5 cycles
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tax ;2 cycles
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lda xlattbl, x ;4 cycles
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slotpatchw2:
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ldx #$d1 ;2 cycles
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sta $c08d, x ;5 cycles
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lda $c08c, x ;4 cycles
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;32 cycles if branch taken
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lda bit2tbl-1, y ;5 cycles
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dey ;2 cycles
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bne b7 ;3 cycles if taken, 2 if not
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;32 cycles
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;+9 cycles
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clc ;2 cycles
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b88: eor encbuf, y ;4 cycles
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b8: tax ;2 cycles
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lda xlattbl, x ;4 cycles
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slotpatchw3:
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ldx #$d1 ;2 cycles
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sta $c08d, x ;5 cycles
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lda $c08c, x ;4 cycles
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bcs f1 ;3 cycles if taken, 2 if not
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;32 cycles if branch taken
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lda encbuf, y ;4 cycles
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iny ;2 cycles
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bne b88 ;3 cycles if taken, 2 if not
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;32 cycles
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;+10 cycles
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sec ;2 cycles
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bcs b8 ;3 cycles
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;32 cycles
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;+3 cycles
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f1: ldy #(epilog_e-epilog)
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;2 cycles
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cmp ($ea,x) ;6 cycles
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b9: lda epilog-1, y ;4 cycles
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jsr writenib3 ;(17 cycles)
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;32 cycles if branch taken
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;+6 cycles
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dey ;2 cycles
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bne b9 ;3 cycles if branch taken, 2 if not
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lda $c08e, x
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lda $c08c, x
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lda $c088, x
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rts
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writenib1:
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cmp ($ea,x) ;6 cycles
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cmp ($ea,x) ;6 cycles
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writenib3:
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slotpatchw4:
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ldx #$d1 ;2 cycles
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writenib4:
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sta $c08d, x ;5 cycles
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ora $c08c, x ;4 cycles
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rts ;6 cycles
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prolog: .byte $ad, $aa, $d5
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prolog_e:
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epilog: .byte $ff, $eb, $aa, $de
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epilog_e:
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xlattbl:
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.byte $96,$97,$9A,$9B,$9D,$9E,$9F,$A6
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.byte $A7,$AB,$AC,$AD,$AE,$AF,$B2,$B3
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.byte $B4,$B5,$B6,$B7,$B9,$BA,$BB,$BC
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.byte $BD,$BE,$BF,$CB,$CD,$CE,$CF,$D3
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.byte $D6,$D7,$D9,$DA,$DB,$DC,$DD,$DE
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.byte $DF,$E5,$E6,$E7,$E9,$EA,$EB,$EC
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.byte $ED,$EE,$EF,$F2,$F3,$F4,$F5,$F6
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.byte $F7,$F9,$FA,$FB,$FC,$FD,$FE,$FF
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