47 lines
726 B
NASM
47 lines
726 B
NASM
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; Pat80 BIOS v0.01
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; @author: Daniele Verducci
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;
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; ROM is at 0x00
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; RAM is at 0x80
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; LCD is at I/O 0x00 and 0x01
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jp sysinit ; Startup vector: DO NOT MOVE! Must be the first instruction
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; SYSTEM CONFIGURATION
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LCD_INSTR_REG: EQU %00000000
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LCD_DATA_REG: EQU %00000001
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; CONSTANTS
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SYSINIT_GREETING:
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DB "Pat80 BIOS v0.1",0 ; null terminated string
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LIPSUM:
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DB "Lorem ipsum dolor sit amet, consectetur adipiscing elit.",0
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include 'driver_hd44780.asm'
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; System initialization
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sysinit:
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call lcd_init
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; write characters to display
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ld bc, SYSINIT_GREETING
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call lcd_print ; write string to screen
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ld bc, LIPSUM
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call lcd_print
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;call lcd_cls ; clear screen
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halt
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