mirror of
https://github.com/deater/dos33fsprogs.git
synced 2024-12-29 00:31:52 +00:00
90 lines
994 B
ArmAsm
90 lines
994 B
ArmAsm
;==========================
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; draw world map
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;==========================
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; including position
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show_map:
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lda #<(map_lzsa)
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sta getsrc_smc+1
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lda #>(map_lzsa)
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sta getsrc_smc+2
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lda DRAW_PAGE
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clc
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adc #$4 ; page to load at?
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; FIXME: really need to load at 0xc and
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; copy
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jsr decompress_lzsa2_fast
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; basic_plot(8+((map_x&0x3)*6)+(tfv_x/6),
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; 8+(((map_x&0xc)>>2)*6)+(tfv_y/6))
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; horizontal
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lda MAP_X
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and #3
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asl
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sta TEMP
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asl
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clc
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adc TEMP ; ( MAP_X & 3 ) * 6
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sta TEMP
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lda TFV_X
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lsr
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lsr
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lsr ; TFV/8
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adc TEMP
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adc #8
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sta CH
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; vertical
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lda MAP_X
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and #$c
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lsr
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sta TEMP
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asl
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clc
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adc TEMP ; ( MAP_X & C ) * 6
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sta TEMP
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lda TFV_Y
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lsr
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lsr
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lsr ; TFV/8
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adc TEMP
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adc #8
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lsr ; divide by 2 as htab_vtab multiplies
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sta CV
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; jsr htab_vtab
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lda CV
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asl
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tay
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lda gr_offsets,Y
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clc
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adc CH
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sta BASL
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lda gr_offsets+1,Y
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sta BASH
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lda #$19 ; red/orange
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ldy #0
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sta (BASL),Y
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jsr page_flip
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jsr wait_until_keypressed
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rts
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