Peritek VCD-V, User Manual

Page: 43 / 183

Peritek
2-12 Installing Your Peritek Graphics Board
2.4 Option Selection
It is best to first test out a board with the factory default configuration
whenever possible. This minimizes the chance of introducing a problem
into a known good board when you are not very familiar with the product.
Sometimes, however, something must be changed. That is what this
section is for. Before changing addresses, please read the commentary on
VMEbus addressing which is in Section 6.2 of this manual.
The VCD-V, VCT-V, and VCU-V share virtually all jumper
configurations. Only the jumper
locations differ. Therefore, this section
covers the changes to all three products. The VCT-V and VCU-V actually
use the identical PC board. They differ only with plug in parts such as
FPGA, color map, cursor, and memory configuration.
The following instructions tell how to modify the VCD-V FAB REV 2
(and on) and the VCU-V and VCT-V FAB REV 4 (and on) to a non-
standard configuration. Refer to Figure 2-3 Jumper Option Locations for
VCD and VCT/VCU (previous two pages) for jumper locations. For wire-
wrap changes, only KYNAR or TEFLON, not enamel or plastic coated,
insulated wire should be used.
2.4.1 CSR Addresses
The address range for the CSR block is jumper selectable to certain
addresses in A16 space. As configured at the factory, bits 4, 5, 14, 15 are
used in the address selection, bits 0-3 are used in the register selection, and
bits 6-13 are hardwired low. If required, bits 6-13 can be some other
pattern - contact Peritek if you need this.
Remember that the base addresses for the Line Buffer, Extended Address
Block, and Interrupt Vector are all software programmable. Furthermore,
if you select the Alternate group 12-15, you will conflict with the standard
Line Buffer address (FFFF0000-FFFF03FF) used by Peritek software for
the Line Buffer. Section 5.2 has complete information about programming
these registers. Refer also to Chapter 6 and note the comments concerning
use of the Motorola MVME167 and MVME187.