01443.pdf

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4000
(250-5000)
Memory
Faxback Doc. # 1443
256K SIMMS
√25-5135
consists of two 256K X 9 SIMM chips at 80 nanoseconds.
√25-5031
consists of four 256K x 9 SIMM chips at 100 nanoseconds. The
individual chips can be ordered from Tandy National Parts under
cat# 25-5000, part# MX-0384.
1MB SIMMS
25-5137 consists of two 1 MB x 9 SIMM chips at 60 nanoseconds.
√25-5134
consists of two 1 MB x 9 SIMM chips at 80 nanoseconds.
√25-5033
consists of two 1 MB x 9 SIMM chips at 100 nanoseconds.
Memory Boards
√25-5029
is a 16-bit access memory expansion board for the 4000. This
product can be ordered from Tandy National Parts under cat# 5000,
part #AX2505029..
Third Party - Memory expansion can also be accomplished by using third
party 16-bit memory expansion board.
√
= Discontinued Radio Shack product
┌────────────────────────────────────────────────────────────────────┐
│4000
- Expand from 1 MB to:
│
├────────────────────────────┬───────────────┬───────────────────────┤
│
Main Logic Board
│
Memory Adapter│ Add to Adapter
│
├──────┬─────────────────────┼───────────────┼───────────────────────┤
│
2MB
│
(4) MX-0384
│
N/A
│
N/A
│
├──────┼─────────────────────┼───────────────┼───────────────────────┤
│
4MB
│
(4) MX-0384
│
AX2505029
│
(8) MX-0384
│
┼──────┼─────────────────────┼───────────────┼───────────────────────┤
│
4MB
│
(2) 25-5137
│
N/A
│
N/A
│
│
│
(replace 256K chips)│
│
│
├──────┼─────────────────────┼───────────────┼───────────────────────┤
│
8MB
│
(4) 25-5137
│
N/A
│
N/A
│
│
│
(replace 256K chips)│
│
│
├──────┼─────────────────────┼───────────────┼───────────────────────┤
│
10MB
│
(4) MX-0384
│
AX2505029
│
(4) 25-5137
│
├──────┼─────────────────────┼───────────────┼───────────────────────┤
│
16MB
│
(4) 25-5137
│
AX2505029
│
(4) 25-5137
│
└──────┴─────────────────────┴───────────────┴───────────────────────┘
There are no jumpers or switches to change, just run SETUP to configure
for new memory configuration.
Faxback document # 1444 will provide specific details on running the
SETUP utility.

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