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Register Summary A-3
Scratch Byte Register (SBR) 0x3A (0xBA) Read/Write 5-45
Scratch Register A (SCRATCHA) 0x34–0x37 (0xB4–0xB7) Read/Write 5-41
SCSI Bus Control Lines (SBCL) 0x0B (0x8B) Read Only 5-20
SCSI Bus Data Lines (SBDL) 0x58 (0xD8) Read Only 5-66
SCSI Chip ID (SCID) 0x04 (0x84) Read/Write 5-11
SCSI Control One (SCNTL1) 0x01 (0x81) Read/Write 5-6
SCSI Control Three (SCNTL3) 0x03 (0x83) Read/Write 5-9
SCSI Control Two (SCNTL2) 0x02 (0x82) Read/Write 5-9
SCSI Control Zero (SCNTL0) 0x00 (0x80) Read/Write 5-2
SCSI Destination ID (SDID) 0x06 (0x86) Read/Write 5-15
SCSI First Byte Received (SFBR) 0x08 (0x88) Read/Write 5-17
SCSI Input Data Latch (SIDL) 0x50 (0xD0) Read Only 5-65
SCSI Interrupt Enable One (SIEN1) 0x41 (0xC1) Read/Write 5-50
SCSI Interrupt Enable Zero (SIEN0) 0x40 (0xC0) Read/Write 5-48
SCSI Interrupt Status One (SIST1) 0x43 (0xC3) Read Only 5-53
SCSI Interrupt Status Zero (SIST0) 0x42 (0xC2) Read Only 5-51
SCSI Longitudinal Parity (SLPAR) 0x44 (0xC4) Read/Write 5-54
SCSI Output Control Latch (SOCL) 0x09 (0x89) Read/Write 5-18
SCSI Output Data Latch (SODL) 0x54 (0xD4) Read/Write 5-66
SCSI Selector ID (SSID) 0x0A (0x8A) Read Only 5-19
SCSI Status One (SSTAT1) 0x0E (0x8E) Read Only 5-24
SCSI Status Two (SSTAT2) 0x0F (0x8F) Read Only 5-25
SCSI Status Zero (SSTAT0) 0x0D (0x8D) Read Only 5-22
SCSI Test One (STEST1) 0x4D (0xCD) Read/Write 5-61
SCSI Test Three (STEST3) 0x4F (0xCF) Read/Write 5-63
Table A.2 SCSI Registers
Register Name Address Read/Write Page