01503.pdf

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4000 LX
(250-5100)
Memory
Faxback Doc. # 1503
256K SIMMS
√25-5135
consists of two 256K X 9 SIMM chips at 80 nanoseconds.
√25-5131
consists of eight 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# 25-5100, part# MX-1582.
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 Zero K Memory Expansion Adapter. These can be ordered
from Tandy National Parts under catalog #25-5100, part# AXX2505029.
Third Party - Memory expansion can also be accomplished by using third
party 16-bit memory board.
√
= Discontinued Radio Shack product
┌─────────────────────────────────────────────────────────────────────┐
│4000
LX - Expand from 2 MB to:
│
├─────────────────────────────┬──────────┬────────────────────────────┤
│
Main Logic Board
│
Adapter
│
Add to Adapter
│
├──────┬──────────────────────┼──────────┼────────────────────────────┤
│
4MB
│
N/A
│
AX2505029│ (8) MX-1582
│
├──────┼──────────────────────┼──────────┼────────────────────────────┤
│
4MB
│
(2) 25-5137
│
N/A
│
N/A
│
│
│
(replace 256K chips)
│
│
│
├──────┼──────────────────────┼──────────┼────────────────────────────┤
│
8MB
│
(4) 25-5137
│
N/A
│
N/A
│
│
│
(replace 256K chips)
│
│
│
├──────┼──────────────────────┼──────────┼────────────────────────────┤
│
10MB
│
N/A
│
AX2505029│ (4) 25-5137
│
├──────┼──────────────────────┼──────────┼────────────────────────────┤
│
16MB
│
(4) 25-5137
│
AX2505029│ (4) 25-5137
│
│
│
(replace 256K chips)
│
│
│
└──────┴──────────────────────┴──────────┴────────────────────────────┘
There are no jumpers or switches to change, just run SETUPLX to configure
for new memory configuration.

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