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.  This
        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.     │
└─────────────────────────────────────────┘


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/tmc-06/03/95)