01699.pdf

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2500 SX/33 (250-1623)
Memory
Faxback Doc. # 1699
1MB SIMMS
25-5137 consists of two 1 MB x 9 SIMM chips at 60 nanoseconds.
4MB SIMMS
25-5136 consists of two 4 MB x 9 SIMM chips at 60 nanoseconds.
product can be obtained from Tandy National Parts.
┌─────────────────────────────────────────┐
│
Tandy 2500SX/33 - Expand from 2 MB:
│
├─────────────────────────────────────────┤
│
Add to Bank 1
│
├───────┬─────────────────────────────────┤
│
4MB
│
25-5137
│
├───────┼─────────────────────────────────┤
│
10MB
│
25-5136
│
├───────┴─────────────────────────────────┤
│
Beyond 10 MB use a Third Party Memory
│
│
Expansion adapter. See vendor
│
│
instructions for chip kits to use.
│
└─────────────────────────────────────────┘
This
Bank 0 on the main logic board has 2 MB of permanently installed memory.
Bank 1 consists of two empty SIMM sockets into which you can install two
60 ns 1MB or 4MB SIMMs.
The following table lists the possible memory configurations:
┌─────────────┬─────────────┬────────────┐
│
Total
│
Number of
│
Type of
│
│
Memory
│
SIMMs In
│
SIMMs in
│
│
│
Bank 1
│
Bank 1
│
├─────────────┼─────────────┼────────────┤
│
2 MB
│
0
│
---
│
default
│
4 MB
│
2
│
1MB
│
│
10 MB
│
2
│
4MB
│
└─────────────┴─────────────┴────────────┘
After installing the SIMMs, run the setup utility to complete the
installation. Faxback Document # 1674 will provide specific instructions
on using the SETUP46.COM utility.
Back of Computer
┌───────────────┬───┬─┬─┬─┬─┬───────┬──────────┬─┬────┬───┬─┬─┬─┬──────────┐
│
└───┘ └─┘ └─┘
└──────────┘ └────┘
└─┘ └─┘
│
│
┌─┐
SIMM
│
│
°
│ │<──
Riser Card
Sockets
───┐
│
│
°
│ │
(Bank 1)
│
│
│
°
│ │
┌─┬─┐ │
│
│ │
│ │ │ │
│ ┌───────┐
│ │
│ │ │ │
│ ├───────┤
│ │
│ │ │ │
│ └───────┘
│ │
┌─────────┐
│ │ │ │
│
├─┤
│
│
│ │ │ │
│
│ │
│
│
│ │ │ │
│
┌───┐
│ │
│
│
│ │ │ │
│
│
│
│ │
└─────────┘
└─┴─┘ │
│
└───┘
│ │ ┌──────────────┐ ┌───────────┐
│
│
└─┘ └──────────────┘ └───────────┘
│
└──────────────────────────────────────────────────────────────────────────┘
(rjs-06/28/93)

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