138 lines
1.9 KiB
NASM
138 lines
1.9 KiB
NASM
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// vim: filetype=kickass
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#import "math.inc"
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* = $0801 // BASIC start address (#2049)
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.byte $0d,$08,$dc,$07,$9e,$20,$34,$39 // BASIC loader to start at $c000...
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.byte $31,$35,$32,$00,$00,$00 // puts BASIC line 2012 SYS 49152
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* = $c000
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.const SCREEN_RAM = $0400
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.const COLOR_RAM = $d800
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.const kernal_scinit = $ff81
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.const kernal_chrout = $ffd2
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.const kernal_write_byte = $e716
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.const zp_temp = $02
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.const cursor_pointer_lo = $05
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.const cursor_pointer_hi = $06
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//
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// main
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//
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main:
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jsr clear_screen
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// lda #0
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// sta $d020
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// sta $d021
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jsr day01
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!loop:
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// inc $d020
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jmp !loop-
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string:
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.text "The quick brown newline jumped over the lazy dog."
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.byte '\n'
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.byte 0
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string_cr:
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.text "The quick brown carriage return jumped over the lazy dog."
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.byte '\r'
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.byte 0
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day01:
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lda #<str_input
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sta $03
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lda #>str_input
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sta $04
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jsr write_string
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lda #<day01_input
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sta $03
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lda #>day01_input
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sta $04
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jsr write_string
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lda #<str_converted
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sta $03
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lda #>str_converted
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sta $04
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jsr write_string
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lda #<day01_input
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sta $03
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lda #>day01_input
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sta $04
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.break
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ldy #0
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!line:
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lda #0
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sta $22
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sta $23
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!digit:
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lda ($03), y
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cmp #'\n'
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beq !break+
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i16_mul10($22, $23)
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lda ($03), y
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sec
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sbc #'0'
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i16_i8_add_a($22, $23)
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iny
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jmp !digit-
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!break:
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sty $24
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lda $23
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jsr print_hex_0x
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lda $22
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jsr print_hex
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jsr print_newline
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jsr print_carriage_return
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ldy $24
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iny
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lda ($03), y
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bne !line-
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!done:
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rts
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day01_input:
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.import text "../rust/inputs/day01_example"
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.byte 0
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str_input:
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.text "# Input"
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.byte '\n', 0
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str_converted:
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.byte '\n'
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.text "# Converted"
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.byte '\n', 0
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buffer:
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.fill $0100, 0
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#import "screen.asm"
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