mirror of
https://github.com/a2-4am/pitch-dark.git
synced 2024-09-26 12:55:08 +00:00
790 lines
12 KiB
Plaintext
Executable File
790 lines
12 KiB
Plaintext
Executable File
;license:MIT
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;(c) 2018 by qkumba
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!to "info#063000",plain
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*=$3000
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save_name = $300
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;;read_size = ?? can be as large as $4000-$300 bytes
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read_buffer = $3500 ;read_size bytes, must be page-aligned
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file_buffer = $7400 ;$400 bytes, must not overlap with read_buffer, must be page-aligned
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record_size = $40
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info_buffer = $7200 ;record_size*8 (currently $200) bytes, can be anywhere
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zpage_info = $fe ;word
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zpage_ptr = $fd
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name_offset = 0 ;1+37 bytes
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time_offset = 42 ;1+8 bytes ("12:01 pm")
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score_offset = 51 ;1+6 bytes (-12345)
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moves_offset = 58 ;1+5 bytes (12345)
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;zpage used by Infocom code
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zp_8C = $8c
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zp_8D = $8d
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zp_8E = $8e ;word
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zp_9C = $9c
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zp_9D = $9d
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zp_9E = $9e
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zp_9F = $9f
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zp_A0 = $a0 ;word
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zp_A3 = $a3
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zp_AC = $ac
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zp_AD = $ad
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zp_B0 = $b0 ;word
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zp_B2 = $b2
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zp_B3 = $b3
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zp_C9 = $c9
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zp_CA = $ca
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zp_CB = $cb
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zp_CC = $cc
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zp_CD = $cd
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zp_CE = $ce
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zp_CF = $cf
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zp_D3 = $d3
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zp_D4 = $d4
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zp_D5 = $d5
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zp_D6 = $d6
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zp_D7 = $d7
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zp_D8 = $d8
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zp_DB = $db
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zp_DC = $dc
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;set prefix if not defined, needed only if stand-alone code
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- jsr $bf00
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op_c7
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!byte $c7
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!word c7_parms
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ldx $200
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bne +
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lda $bf30
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sta c5_parms+1
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jsr $bf00
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!byte $c5
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!word c5_parms
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ldx $201
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inx
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txa
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and #$0f
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sta $200
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lda #$2f
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sta $201
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dec op_c7
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bne -
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+
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jsr exchange
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lda #>info_buffer
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sta zpage_info+1
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lda #<info_buffer
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sta zpage_info
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jsr $bf00
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!byte $c8 ;open file
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!word c8_parms
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lda c8_handle
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sta ce_handle
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sta ca_handle
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;position to file offset
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lda #0
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sta position+1
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fetch_info
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ldy #name_offset
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sty zpage_ptr
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!if name_offset=0 {
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tya
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} else {
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lda #0
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}
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sta (zpage_info),y
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position
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lda #0
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ldx #0
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stx ce_offset+2
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asl
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asl
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asl
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asl
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asl
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asl
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ora #3
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sta ce_offset+1
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rol ce_offset+2
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jsr $bf00
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!byte $ce ;seek
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!word ce_parms
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bcs nextpos
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lda #1
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sta ca_size+1
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jsr $bf00
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!byte $ca ;read file
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!word ca_parms
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lda read_buffer+$0e
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sta ca_size+1
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inc ca_offset+1
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jsr $bf00
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!byte $ca ;read file
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!word ca_parms
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dec ca_offset+1
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jsr dump_info
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nextpos
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clc
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lda zpage_info
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adc #record_size
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sta zpage_info
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bcc +
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inc zpage_info+1
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+ inc position+1
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lda position+1
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cmp #8
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bcc fetch_info
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jsr $bf00
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!byte $cc ;close file
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!word cc_parms
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exchange
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ldx #(zp_DC-zp_8C)
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- ldy zpage_old-1,x
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lda zp_8C-1,x
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sty zp_8C-1,x
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sta zpage_old-1,x
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dex
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bne -
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rts
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c7_parms
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!byte 1
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!word $200
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c5_parms
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!byte 2
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!byte 0
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!word $201
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c8_parms
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!byte 3
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!word save_name
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!word file_buffer
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c8_handle
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!byte 0
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ce_parms
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!byte 2
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ce_handle
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!byte 0
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ce_offset
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!byte 0,0,0
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ca_parms
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!byte 4
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ca_handle
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!byte 0
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ca_offset
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!word read_buffer
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ca_size
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!word 0
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!word $ffff
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cc_parms
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!byte 1
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!byte 0
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dump_info
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tsx
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stx stack_pointer+1
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;set up pointers for decompression and "score" display
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lda #>read_buffer
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sta zp_A3
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lda read_buffer+1
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and #2
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sta zp_DC
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clc
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lda read_buffer+$0d
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sta zp_AC
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lda read_buffer+$0c
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adc #>read_buffer
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sta zp_AD
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clc
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lda read_buffer+$19
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sta zp_B0
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lda read_buffer+$18
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adc #>read_buffer
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sta zp_B0+1
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clc
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lda read_buffer+$0b
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sta zp_B2
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lda read_buffer+$0a
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adc #>read_buffer
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sta zp_B3
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;dump info, actual Infocom code in upper-case
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lda #42
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sta max_chars
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LDA #$10 ; location
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JSR fetch_obj
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LDA zp_8C
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JSR decompress
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lda zpage_ptr
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!if name_offset>0 {
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sec
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sbc #name_offset
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}
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ldy #name_offset
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sta (zpage_info),y
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ldy #time_offset
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sty zpage_ptr
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lda #0
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sta max_chars ;can't overflow anymore
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sta (zpage_info),y
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LDA #$11 ; score
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JSR fetch_obj
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LDA zp_DC
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BNE loc_1627
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ldy #score_offset
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sty zpage_ptr
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LDA zp_8C
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STA zp_D3
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LDA zp_8D
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STA zp_D4
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JSR sub_215D
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sec
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lda zpage_ptr
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sbc #score_offset
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ldy #score_offset
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sta (zpage_info),y
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JMP loc_165F
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loc_1627:
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LDA zp_8C
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BNE loc_164B
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LDA #$18
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loc_164B:
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CMP #$0D
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BCC loc_1651
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SBC #$0C
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loc_1651:
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STA zp_D3
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LDA #$00
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STA zp_D4
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JSR sub_215D
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LDA #$3A
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JSR emit_char
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loc_165F:
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LDA #$12 ; moves or minutes
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JSR fetch_obj
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LDA zp_8C
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STA zp_D3
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LDA zp_8D
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STA zp_D4
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LDA zp_DC
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BNE loc_1676
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ldy #moves_offset
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sty zpage_ptr
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JSR sub_215D
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sec
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lda zpage_ptr
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sbc #moves_offset
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ldy #moves_offset
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sta (zpage_info),y
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rts
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loc_1676:
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LDA zp_8C
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CMP #$0A
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BCS loc_1681
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LDA #$30
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JSR emit_char
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loc_1681:
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JSR sub_215D
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LDA #$20
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JSR emit_char
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LDA #$11 ; hours
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JSR fetch_obj
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LDA zp_8C
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CMP #$0C
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BCS loc_1698
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LDA #$61
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BNE loc_169A
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loc_1698:
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LDA #$70
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loc_169A:
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JSR emit_char
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LDA #$6D
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JSR emit_char
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sec
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lda zpage_ptr
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sbc #time_offset
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ldy #time_offset
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sta (zpage_info),y
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rts
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loc_1459:
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jmp * ;internal error
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fetch_obj:
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JSR sub_1A70
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LDA (zp_8E),Y
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STA zp_8D
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INY
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LDA (zp_8E),Y
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STA zp_8C
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RTS
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sub_1A70:
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SEC
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SBC #$10
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LDY #0
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STY zp_8E+1
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ASL
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ROL zp_8E+1
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CLC
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ADC zp_AC
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STA zp_8E
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LDA zp_8E+1
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ADC zp_AD
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STA zp_8E+1
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locret_1A85:
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RTS
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decompress:
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JSR sub_26A0
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LDY #7
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LDA (zp_8E),Y
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TAX
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INY
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LDA (zp_8E),Y
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STA zp_8E
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STX zp_8E+1
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INC zp_8E
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BNE loc_1D23
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INC zp_8E+1
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loc_1D23:
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JSR sub_2474
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JMP sub_2495
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sub_1FE2:
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LDA #0
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SEC
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SBC zp_D3
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STA zp_D3
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LDA #0
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SBC zp_D4
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STA zp_D4
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RTS
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sub_1FF0:
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LDA zp_D5
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ORA zp_D6
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BEQ loc_2021
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JSR sub_2026
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loc_1FF9:
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ROL zp_D3
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ROL zp_D4
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ROL zp_D7
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ROL zp_D8
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LDA zp_D7
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SEC
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SBC zp_D5
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TAY
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LDA zp_D8
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SBC zp_D6
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BCC loc_2011
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STY zp_D7
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STA zp_D8
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loc_2011:
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DEX
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BNE loc_1FF9
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ROL zp_D3
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ROL zp_D4
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LDA zp_D7
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STA zp_D5
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LDA zp_D8
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STA zp_D6
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RTS
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loc_2021:
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LDA #8
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JMP loc_1459
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sub_2026:
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LDX #$10
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LDA #0
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STA zp_D7
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STA zp_D8
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CLC
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RTS
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sub_215D:
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LDA zp_D4
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BPL loc_2169
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LDA #$2D
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JSR emit_char
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JSR sub_1FE2
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loc_2169:
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LDA #0
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STA zp_DB
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loc_216D:
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LDA zp_D3
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ORA zp_D4
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BEQ loc_2185
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LDA #$A
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STA zp_D5
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LDA #0
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STA zp_D6
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JSR sub_1FF0
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LDA zp_D5
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PHA
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INC zp_DB
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BNE loc_216D
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loc_2185:
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LDA zp_DB
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BNE loc_218E
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LDA #$30
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JMP emit_char
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loc_218E:
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PLA
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CLC
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ADC #$30
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JSR emit_char
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DEC zp_DB
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BNE loc_218E
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RTS
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sub_237E:
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LDA zp_9D
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CLC
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ADC zp_A3
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STA zp_A0+1
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LDX #$FF
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STX zp_9F
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INX
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STX zp_A0
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loc_23A0:
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LDY zp_9C
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LDA (zp_A0),Y
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INC zp_9C
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BNE loc_23B2
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LDY #0
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STY zp_9F
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INC zp_9D
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BNE loc_23B2
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INC zp_9E
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loc_23B2:
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TAY
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RTS
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sub_2474:
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LDA zp_8E
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STA zp_9C
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LDA zp_8E+1
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STA zp_9D
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LDA #0
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STA zp_9E
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STA zp_9F
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RTS
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sub_2483:
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LDA zp_8E
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ASL
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STA zp_9C
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LDA zp_8E+1
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ROL
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STA zp_9D
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LDA #0
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STA zp_9F
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ROL
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STA zp_9E
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locret_2494:
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RTS
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sub_2495:
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LDX #0
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STX zp_C9
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STX zp_CD
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DEX
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STX zp_CA
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loc_249E:
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JSR sub_2569
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BCS locret_2494
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STA zp_CB
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TAX
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BEQ loc_24E9
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CMP #4
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BCC loc_2507
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CMP #6
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BCC loc_24ED
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JSR sub_255D
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TAX
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BNE loc_24C1
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LDA #$5B
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loc_24B8:
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CLC
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ADC zp_CB
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loc_24BB:
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JSR emit_char
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JMP loc_249E
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loc_24C1:
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CMP #1
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BNE loc_24C9
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LDA #$3B
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BNE loc_24B8
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loc_24C9:
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LDA zp_CB
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SEC
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SBC #6
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BEQ loc_24D7
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TAX
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LDA byte_2686,X
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JMP loc_24BB
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loc_24D7:
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JSR sub_2569
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ASL
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ASL
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ASL
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ASL
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ASL
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STA zp_CB
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JSR sub_2569
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ORA zp_CB
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JMP loc_24BB
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loc_24E9:
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LDA #$20
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BNE loc_24BB
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loc_24ED:
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SEC
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SBC #3
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TAY
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JSR sub_255D
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BNE loc_24FB
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STY zp_CA
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JMP loc_249E
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loc_24FB:
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STY zp_C9
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CMP zp_C9
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BEQ loc_249E
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LDA #0
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STA zp_C9
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BEQ loc_249E
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loc_2507:
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SEC
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SBC #1
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ASL
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ASL
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ASL
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ASL
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ASL
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ASL
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STA zp_CC
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JSR sub_2569
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ASL
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CLC
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ADC zp_CC
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TAY
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LDA (zp_B0),Y
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STA zp_8E+1
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INY
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LDA (zp_B0),Y
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STA zp_8E
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LDA zp_9E
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PHA
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LDA zp_9D
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PHA
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LDA zp_9C
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PHA
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LDA zp_C9
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PHA
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|
LDA zp_CD
|
|
PHA
|
|
LDA zp_CF
|
|
PHA
|
|
LDA zp_CE
|
|
PHA
|
|
JSR sub_2483
|
|
JSR sub_2495
|
|
PLA
|
|
STA zp_CE
|
|
PLA
|
|
STA zp_CF
|
|
PLA
|
|
STA zp_CD
|
|
PLA
|
|
STA zp_C9
|
|
PLA
|
|
STA zp_9C
|
|
PLA
|
|
STA zp_9D
|
|
PLA
|
|
STA zp_9E
|
|
LDX #$FF
|
|
STX zp_CA
|
|
INX
|
|
STX zp_9F
|
|
JMP loc_249E
|
|
|
|
sub_255D:
|
|
LDA zp_CA
|
|
BPL loc_2564
|
|
LDA zp_C9
|
|
RTS
|
|
|
|
loc_2564:
|
|
LDY #$FF
|
|
STY zp_CA
|
|
RTS
|
|
|
|
sub_2569:
|
|
LDA zp_CD
|
|
BPL loc_256F
|
|
SEC
|
|
RTS
|
|
|
|
loc_256F:
|
|
BNE loc_2584
|
|
INC zp_CD
|
|
JSR sub_237E
|
|
STA zp_CF
|
|
JSR sub_237E
|
|
STA zp_CE
|
|
LDA zp_CF
|
|
LSR
|
|
LSR
|
|
JMP loc_25AD
|
|
|
|
loc_2584:
|
|
SEC
|
|
SBC #1
|
|
BNE loc_259F
|
|
LDA #2
|
|
STA zp_CD
|
|
LDA zp_CE
|
|
STA zp_8E
|
|
LDA zp_CF
|
|
ASL zp_8E
|
|
ROL
|
|
ASL zp_8E
|
|
ROL
|
|
ASL zp_8E
|
|
ROL
|
|
JMP loc_25AD
|
|
|
|
loc_259F:
|
|
LDA #0
|
|
STA zp_CD
|
|
LDA zp_CF
|
|
BPL loc_25AB
|
|
LDA #$FF
|
|
STA zp_CD
|
|
|
|
loc_25AB:
|
|
LDA zp_CE
|
|
|
|
loc_25AD:
|
|
AND #$1F
|
|
CLC
|
|
RTS
|
|
|
|
byte_2686:
|
|
!BYTE 0
|
|
!BYTE $D, '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '.', ',', '!', '?', '_'
|
|
!BYTE '#', $27, '"', '/', $5C, '-', ':', '(', ')'
|
|
|
|
sub_26A0:
|
|
STA zp_8E
|
|
LDX #0
|
|
STX zp_8E+1
|
|
ASL
|
|
ROL zp_8E+1
|
|
ASL
|
|
ROL zp_8E+1
|
|
ASL
|
|
ROL zp_8E+1
|
|
CLC
|
|
ADC zp_8E
|
|
BCC loc_26B6
|
|
INC zp_8E+1
|
|
|
|
loc_26B6:
|
|
CLC
|
|
ADC #$35
|
|
BCC loc_26BD
|
|
INC zp_8E+1
|
|
|
|
loc_26BD:
|
|
CLC
|
|
ADC zp_B2
|
|
STA zp_8E
|
|
LDA zp_8E+1
|
|
ADC zp_B3
|
|
STA zp_8E+1
|
|
RTS
|
|
|
|
emit_char
|
|
sty yreg+1
|
|
inc zpage_ptr
|
|
ldy zpage_ptr
|
|
sta (zpage_info),y
|
|
dec max_chars
|
|
beq fail_slot
|
|
yreg
|
|
ldy #0
|
|
rts
|
|
|
|
fail_slot
|
|
stack_pointer
|
|
ldx #0
|
|
txs
|
|
rts
|
|
|
|
max_chars !byte 0
|
|
|
|
zpage_old
|
|
!if *+(zp_DC-zp_8C)>=read_buffer {
|
|
!error "Code is too large"
|
|
} |