8bitworkshop/presets/apple2/hgrtest.a


	processor 6502
	seg program
	org $803

.start
	sta $c050	; set graphics
        sta $c052	; no mixed mode
	sta $c057	; set hires
        
        ldx #0
.loop   inc $2000,x	; increment hgr byte
        inx
        bne .loop
        lda .loop+2	; increment hi byte of instruction
        clc
        adc #1
        sta .loop+2	; self-modifying code
        cmp #$40
        bne .loop
        lda #$20	; reset to $2000
        sta .loop+2
	jmp .start
make sure all presets start with a blank line, looks nicer (tools/checkpresets.py); updated nes 2018-08-13 18:17:36 -04:00
fixed verilog local paths 2018-07-22 08:31:42 -04:00			`processor 6502`
			`seg program`
			`org $803`

			`.start`
			`sta $c050 ; set graphics`
			`sta $c052 ; no mixed mode`
			`sta $c057 ; set hires`

			`ldx #0`
			`.loop inc $2000,x ; increment hgr byte`
			`inx`
			`bne .loop`
			`lda .loop+2 ; increment hi byte of instruction`
			`clc`
			`adc #1`
look in cache first, fetch local/ verilog includes too; apple2 reset; platform checkmark 2018-07-24 11:38:56 -04:00			`sta .loop+2 ; self-modifying code`
fixed verilog local paths 2018-07-22 08:31:42 -04:00			`cmp #$40`
			`bne .loop`
			`lda #$20 ; reset to $2000`
			`sta .loop+2`
			`jmp .start`