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https://github.com/deater/dos33fsprogs.git
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57 lines
656 B
ArmAsm
57 lines
656 B
ArmAsm
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;======================
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; hgr 1x8 draw sprite
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;======================
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; SPRITE in INL/INH
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; Location at CURSOR_X CURSOR_Y*7
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; X, Y, A trashed
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hgr_draw_sprite_1x8:
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; set up pointers
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lda INL
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sta hds_smc1+1
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lda INH
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sta hds_smc1+2
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ldx #0
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hgr_1x8_sprite_yloop:
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txa
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pha
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clc
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adc CURSOR_Y
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; ldx #0
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; ldy #0
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; calc GBASL/GBASH
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; jsr HPOSN ; (Y,X),(A) (values stored in HGRX,XH,Y)
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tax
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lda hposn_low,X
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sta GBASL
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lda hposn_high,X
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sta GBASH
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pla
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tax
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ldy CURSOR_X
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lda (GBASL),Y
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hds_smc1:
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eor $D000,X ; not $0000 or it will make it ZP
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invert_smc1:
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eor #$00 ; invert
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sta (GBASL),Y
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inx
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cpx #8
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bne hgr_1x8_sprite_yloop
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rts
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