Model 466-1 Adapter
2 Adapter Functions
Memory Mapping also controls access to dual-port memory (Dual Port RAM).
Dual Port RAM is an optional card installed on the VMEbus adapter card. It
provides a memory buffer; saves the cost of additional memory cards; and
requires no additional VMEbus card slots.
SBS's Dual Port RAM is a printed circuit card that plugs into the VMEbus
adapter card as a daughter card. The following memory sizes are currently
available: 128K and 8M bytes.
Optional Dual Port RAM provides shared memory space that is accessible
from either system. Dual Port RAM access uses only the bandwidth of the
accessing bus. Consequently, data can be exchanged with minimal impact on
the performance of the other system's bus. Both systems can access Dual Port
RAM simultaneously; the adapter arbitrates accesses.
Model 466-1 adapter does not link the timing of the two buses (so that activity
on one bus slows down the other). Instead, the adapter permits each bus to
operate
independently
. The buses are linked only when a memory or I/O
reference is made to an address on one system that translates to a reference on
the other.
The Model 466-1 adapter consists of two cards: a SBus card and a 6U size
VMEbus card. The two cards are connected by a round EMI-shielded copper-
conductor cable purchased separately from SBS.
Cable is available in standard 8-foot or 25-foot lengths and custom lengths.
Fiber-Optic Interface Modules are also available from SBS.
Software drivers are available on the CD-ROM included with the adapter.
The software provides a SBus device driver and example programs that
demonstrate use of the Model 466-1 adapter.
Содержание 466-1
Страница 1: ...Model 466 1 Adapter Hardware Manual Connects a SBus Computer to a VMEbus System...
Страница 2: ...Model 466 1 Adapter ii...
Страница 24: ...Model 466 1 Adapter 14 Adapter Functions...
Страница 52: ...Model 466 1 Adapter 42 VMEbus Adapter Card Configuration...
Страница 70: ...Model 466 1 Adapter 60 CSR Accessed From The SBus...
Страница 88: ...Model 466 1 Adapter 78 Common Problems And Solutions...
Страница 106: ...Model 466 1 Adapter 96 Jumper Configuration Worksheets...
Страница 107: ...Model 466 1 Adapter Jumper Configuration Worksheets 97 D 1 SBus Adapter Card Worksheet J1...
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