ACC-72EX User Manual
Hardware
17
HARDWARE
E3: UBUS Address
E-point jumper E3 on the ACC-72EX controls the base address and range on the UBUS. Since each
ACC-72EX uses full-13 bit addressing, it consumes all the memory addressable through each chip select.
As a result, two is the maximum number of ACC-72EX boards that can be used in a Turbo UMAC rack.
E3
Turbo PMAC
Power PMAC
1-2 Y/X:$6C000 - $6FFFF
ACC-72EX[0] ($E00000)
2-3 Y/X:$74000 - $7FFFF
ACC-72EX[1] ($F00000)
The default location on Turbo PMAC is Y/X:$6C000 - $6FFFF ($E00000 on Power PMAC).
Note:
Do not set the ACC-72EX to the DPR address range $6C000-$6FFFF if the
UMAC is equipped with an Acc-54E. Acc-54E is set to this range as default.
CS16- Identification
One of the features of the UBUS is that memory locations, selected by CS16 (Chip Select 16/Active
Low), were reserved for board identification information.
Vendor ID
(8 bits)
Options Present
(10 bits)
Revision Number (4 bits)
Product ID
(14 bits)
This information (36 bits) is accessible directly with I-Variables added in Turbo PMAC Firmware 1.936
or later. A summary of the PMAC Gateway ID information is in the table below.
I39 controls the values reported.
I39= I4942…I4952 reports the following
0
36 bits (Vendor ID, Options present, Rev Number, Product ID)
1
8 bits (Vendor ID)
2
10 bits (Options Present) Reported by PMAC in HEX ($)
3
4 bits (Revision Number)
4
14 bits (Product ID)
5
19 bits (Card Base Address)
Identification Information
The vendor ID, part number, and revision numbers are programmed into the ACC-72EX base board. The
Option Number is set by jumpers on the board. The settings below are given for reference only. There is
no need to change these from the factory settings.
