SPIOCAP
if ((ahc_inb(ahc, SPIOCAP) & SSPIOCPS) == 0)
spiocap = ahc_inb(ahc, SPIOCAP);
ahc_outb(ahc, SPIOCAP, spiocap);
*eeprom_present = (ahc_inb(ahc, SPIOCAP) & EEPROM) ? 1 : 0;
&& (ahc_inb(ahc, SPIOCAP) & SEEPROM) == 0)