Product Overview GEM80-400
Page xxvi ALSPA GEM80-400 SERIES CONTROLLERS TECHNICAL MANUAL Issue 3 04/99
8268-410x STARNET Module single width
8284-400x IMAGEM Graphics Display Module. single width
8272-4004 256K RAM Module (without arbiter) single width
8279-400x GEMLAN-D Module double width
Each slot will accept any of the modules listed above
The RAM cards are used to provide either Off-line storage memory, or additional
IMAGEM format storage RAM.
By placing the Central Highway Modules in the appropriate slots, most system
configurations can be catered for. This feature gives the user the ability to
enhance a system without the need to modify or add backplanes.
Should a need arise for a system that cannot be catered for using the factory
pre-set configuration, systems may be rapidly tailored to an individual user's
requirement.
The GEM80-400 Enhanced Controller also has five central highway slots which
can utilise and of the above modules. In addition, if Fast I/O capability is required
a Fast I/O Driver module 8300-4003 may be fitted. In this case the slot position is
fixed and the 8300-4003 must be fitted to the slot on the immediate right of the
GEM
80-400 Processor Module.
5.2. IMAGEM CRT Monitor Frequency Selection
The 8284-400x IMAGEM Graphics Display Module has been improved and now
produces the higher frequency video signals that are used by readily available
high quality video monitors. However, the 8284 may be configured to use the
same monitors as the 8219 IMAGEM Module by placing a jumper or wire-link
between the pair of wire wrap posts associated with the slot or slots containing
the 8284-400xs. These wire wrap posts are accessible once the power supply
module has been removed.
5.3. Fast I/O capability
The Fast I/O Modules are accessed in the normal way via C- and D-tables.
Status linking is not provided.
5.3.1. Fast I/O with GEM80/400S Controllers
Fast I/O modules may be used within the GEM80-400S system by fitting a 8300-
4003 Fast I/O Driver Module in the controller subrack, and adding the Fast I/O
modules together with their appropriate connectors in the four Fast I/O slots
available.
Where the Fast I/O Modules require a -15V supply then this must be provided by
means of a separate power supply. See Chapter 6 for details.
To Next Page
Loading...