Function flash_write

src/flashrom.cpp:744–874

}

bool flash_write(void *fdv, uaecptr addr, uae_u8 v)
{
	struct flashrom_data *fd = (struct flashrom_data*)fdv;
	int other_byte_mult = 1;

	if (!fd)
		return false;

	if (fd->flags & (FLASHROM_SKIP_EVERY_OTHER_BYTE | FLASHROM_EVERY_OTHER_BYTE)) {
		addr >>= 1;
		other_byte_mult = 2;
	}

	if (addr * other_byte_mult >= fd->allocsize) {
		return false;
	}

	int oldstate = fd->state;
	bool det = false;

#if FLASH_LOG > 1
	write_log(_T("flash write %08x %02x (%d) PC=%08x\n"), addr, v, fd->state, m68k_getpc());
#endif

	addr &= fd->mask;

	if (fd->state == 7 || fd->state == 8) {
		int a = addr * other_byte_mult;
		writeflash(fd, a, v);
		return true;
	}

	if (v == 0xf0 && fd->state > 0 && fd->state < 7) {
		fd->state = 0;
		return false;
	}

	// unlock
	if (addr == 0x5555 && fd->state <= 2 && v == 0xaa) {
		fd->state = 1;
		det = true;
	}
	if (addr == 0x2aaa && fd->state == 1 && v == 0x55) {
		fd->state = 2;
		det = true;
	}

	// software id exit and reset first byte
	if (addr == 0x5555 && fd->state == 3 && v == 0xaa) {
		fd->state = 1;
		det = true;
	}

	// autoselect
	if (addr == 0x5555 && fd->state == 2 && v == 0x90) {
		fd->state = 3;
		det = true;
	}