Difference between revisions of "LB-MEM-03"
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| Line 23: | Line 23: | ||
[[file:LB-MEM-03_EPROM_27C256_512.PNG]] | [[file:LB-MEM-03_EPROM_27C256_512.PNG]] | ||
| − | * J2 | + | * J2 (A15) |
| − | * J3 | + | ** Pin 3 on 32-pin part |
| − | * J4 | + | ** Pin 1 on 28-pin part |
| − | * J5 | + | * J3 (A19) |
| − | * J6 | + | ** Pin 1 on 32 pin part |
| + | ** Not used on 28-pin part | ||
| + | * J4 (A17) | ||
| + | ** Pin 30 on 32-pin part | ||
| + | ** Pin 28 on 28-pin part | ||
| + | * J5 (A18) | ||
| + | ** Pin 31 on 32-pin part | ||
| + | ** Not used on 28-pin part | ||
| + | * J6 (A14) | ||
| + | ** Pin 29 on 32-pin part | ||
| + | ** Pin 26 on 28-pin part | ||
==== All EPROMs ==== | ==== All EPROMs ==== | ||
Revision as of 16:11, 20 August 2024
- EPROM/EEPROM card
- 32-pin ZIF socket
- Up to 1MB
- Headers to jump for smaller parts
- Connects to Address/Data and Memory control lines
- 50x75mm card
Contents
Design
EPROM in ZIF socket
EPROM Size Jumpers
27C256/27C512 EPROMs
- J2 (A15)
- Pin 3 on 32-pin part
- Pin 1 on 28-pin part
- J3 (A19)
- Pin 1 on 32 pin part
- Not used on 28-pin part
- J4 (A17)
- Pin 30 on 32-pin part
- Pin 28 on 28-pin part
- J5 (A18)
- Pin 31 on 32-pin part
- Not used on 28-pin part
- J6 (A14)
- Pin 29 on 32-pin part
- Pin 26 on 28-pin part
All EPROMs
Backplane
Mechanicals
Checkout
Rev 1
- Holes were very tight for ZIF pins
Assembly Sheet
- Interactive BOM
