mirror of https://github.com/zxdos/zxuno.git
43 lines
1.1 KiB
NASM
43 lines
1.1 KiB
NASM
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include version.asm
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macro wreg dir, dato
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rst $28
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defb dir, dato
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endm
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output bootloader.rom
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define zxuno_port $fc3b
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define flash_spi 2
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define flash_cs 3
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define core_addr $fc
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define core_boot $fd
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di
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ld sp, 0
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wreg flash_cs, 1 ; desactivamos spi, enviando un 0
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wreg flash_cs, 0 ; activamos spi, enviando un 0
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wreg flash_spi, 6 ; envío write enable
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wreg flash_cs, 1 ; desactivamos spi, enviando un 1
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wreg flash_cs, 0 ; activamos spi, enviando un 0
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wreg flash_spi, $c5 ; envío wrear
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out (c), 0
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IF version=2
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wreg core_addr, $09
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ld a, $80
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ELSE
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wreg core_addr, $0b
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xor a
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ENDIF
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out (c), a
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out (c), 0
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wreg core_boot, 1
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block $28 - $
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rst28 ld bc, zxuno_port + $100
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pop hl
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outi
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ld b, (zxuno_port >> 8)+2
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outi
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jp (hl)
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