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Register Summary A-3
DMA Command (DCMD) 0x27 Read/Write 4-63
DMA Control (DCNTL) 0x3B Read/Write 4-70
DMA FIFO (DFIFO) 0x20 Read/Write 4-57
DMA Interrupt Enable (DIEN) 0x39 Read/Write 4-69
DMA Mode (DMODE) 0x38 Read/Write 4-66
DMA Next Address (DNAD) 0x28–0x2B Read/Write 4-64
DMA Next Address 64 (DNAD64) 0xB8–0xBB Read/Write 4-103
DMA SCRIPTS Pointer (DSP) 0x2C–0x2F Read/Write 4-64
DMA SCRIPTS Pointer Save (DSPS) 0x30–0x33 Read/Write 4-65
DMA Status (DSTAT) 0x0C Read Only 4-39
DSA Relative Selector (DRS) 0xAC–0xAF Read/Write 4-101
Dynamic Block Move Selector (DBMS) 0xB4–0xB7 Read/Write 4-103
Entry Storage Address (ESA) 0xD0–0xD3 Read/Write 4-106
General Purpose (GPREG0) 0x07 Read/Write 4-35
General Purpose Pin Control Zero (GPCNTL0) 0x47 Read/Write 4-82
Instruction Address (IA) 0xD4–0xD7 Read/Write 4-107
Interrupt Status One (ISTAT1) 0x15 Read/Write 4-51
Interrupt Status Zero (ISTAT0) 0x14 Read/Write 4-48
Mailbox One (MBOX1) 0x17 Read/Write 4-52
Mailbox Zero (MBOX0) 0x16 Read/Write 4-52
Memory Access Control (MACNTL) 0x46 Read/Write 4-81
Memory Move Read Selector (MMRS) 0xA0–0xA3 Read/Write 4-100
Memory Move Write Selector (MMWS) 0xA4–0xA7 Read/Write 4-100
Phase Mismatch Jump Address 1 (PMJAD1) 0xC0–0xC3 Read/Write 4-104
Phase Mismatch Jump Address 2 (PMJAD2) 0xC4–0xC7 Read/Write 4-104
Table A.2 LSI53C875A SCSI Register Map (Cont.)
Register Name Address Read/Write Page