212 LOAD ( z80a ) 0x8000 CONSTANT RAMSTART 0xf000 CONSTANT RS_ADDR 0x80 CONSTANT ACIA_CTL 0x81 CONSTANT ACIA_IO 4 CONSTANT SDC_SPI 5 CONSTANT SDC_CSLOW 6 CONSTANT SDC_CSHIGH RAMSTART 0x70 + CONSTANT ACIA_MEM