mirror of
https://github.com/robmcmullen/asmgen.git
synced 2024-12-22 14:29:18 +00:00
106 lines
1.8 KiB
ArmAsm
106 lines
1.8 KiB
ArmAsm
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; os memory map
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CLRTEXT = $c050
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SETTEXT = $c051
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CLRMIXED = $c052
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SETMIXED = $c053
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TXTPAGE1 = $c054
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TXTPAGE2 = $c055
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CLRHIRES = $c056
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SETHIRES = $c057
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; Zero page locations we use (unused by Monitor, Applesoft, or ProDOS)
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hgr_ptr = $06
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font_ptr = $08
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temp_row = $19
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temp_col = $1a
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text_ptr = $1b
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counter = $ce
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scratch_0 = $d7
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start_char = $fc
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*= $6000
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start
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lda #0
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sta start_char
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jsr filltext
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loop
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; copy the normal way
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lda #<slowfont
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sta copytexthgr_dest_smc+1
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lda #>slowfont
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sta copytexthgr_dest_smc+2
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jsr copytexthgr
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; copy using the fast font traspose
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lda #<FASTFONT_H1
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sta copytexthgr_dest_smc+1
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lda #>FASTFONT_H1
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sta copytexthgr_dest_smc+2
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jsr copytexthgr
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jmp loop
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copytexthgr
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ldy #0 ; y is rows
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copytexthgr_outer
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lda textrow_h,y
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ora #4
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sta copytexthgr_src_smc+2
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lda textrow_l,y
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sta copytexthgr_src_smc+1
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ldx #0 ; x is columns
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copytexthgr_src_smc
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lda $ffff,x
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copytexthgr_dest_smc
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jsr $ffff
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inx
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cpx #32
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bcc copytexthgr_src_smc
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iny
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cpy #24
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bcc copytexthgr_outer
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rts
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filltext
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ldy #0 ; Loop a bit
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sty counter
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ib_outer
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lda textrow_h,y
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sta text_ptr+1
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lda textrow_l,y
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sta text_ptr
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ldx start_char
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ldy #0
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ib_inner
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txa
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adc #32
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sta (text_ptr),y
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inx
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iny
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cpy #40
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bcc ib_inner
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ldy counter
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iny
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sty counter
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cpy #24
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bcc ib_outer
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inc start_char ; change starting char for next time
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rts
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textrow_l
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.byte $00,$80,$00,$80,$00,$80,$00,$80
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.byte $28,$A8,$28,$A8,$28,$A8,$28,$A8
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.byte $50,$D0,$50,$D0,$50,$D0,$50,$D0
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textrow_h
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.byte $04,$04,$05,$05,$06,$06,$07,$07
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.byte $04,$04,$05,$05,$06,$06,$07,$07
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.byte $04,$04,$05,$05,$06,$06,$07,$07
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.include fatfont.s
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.include slowfont.s
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.include fonttest-asmgen-driver.s
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