LOGADDR
out_8(&mb->iac, LOGADDR);
out_8(&mb->iac, ADDRCHG | LOGADDR);
out_8(&mb->iac, LOGADDR);
out_8(&mb->iac, ADDRCHG | LOGADDR);
mb->iac = LOGADDR;
mb->iac = ADDRCHG | LOGADDR;
mb->iac = LOGADDR;
mb->iac = ADDRCHG | LOGADDR;