SBS Technologies 466-1, Руководство по оборудованию

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Model 466-1 Adapter
CSR Accessed From The SBus 45
Chapter 6: CSR Accessed From The SBus
6.0 Introduction
Chapter 6 describes SBus adapter card address mapping, and Control and
Status Registers (CSR). The registers are accessed through SBus node I/O slot
space.
The first 8 bytes of the SBus adapter card I/O space are for a SBus processor
to control and check status of the local adapter card in the SPARCstation --
the
adapter Local Node Registers
. The following 8 bytes of the adapter I/O
space are for a SBus processor to talk to the remote (VMEbus) adapter card
registers -- the
adapter Remote Node Registers
. All other bytes are
reserved. See the SBus adapter Address Map in section 3.3.
Chassis A: SBus
Local Node Registers
Remote Node Registers
I/O Cable Interface
x
Chassis B: VMEbus
Local Node Registers
Remote Node Registers
I/O Cable Interface
x
>
<
>
The following table shows the destination of adapter I/O accesses:
SBus
I/O ADDR RANGE
(hex)
DESTINATION
020 0000 - 020 0007 Local Node I/O - SBus
020 0008 - 020 000F Remote Node I/O - VMEbus