Difference between revisions of "LB-MEM-03"
Jump to navigation
Jump to search
Blwikiadmin (talk | contribs) |
Blwikiadmin (talk | contribs) |
||
| Line 69: | Line 69: | ||
== Checkout == | == Checkout == | ||
| + | |||
| + | === Rev 2 === | ||
| + | |||
| + | * Rev 2 PCB holes are good size | ||
=== Rev 1 === | === Rev 1 === | ||
| − | |||
* Holes were very tight for ZIF pins | * Holes were very tight for ZIF pins | ||
Revision as of 19:45, 5 September 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
- J2 (A15/Vcc)
- Pin 3 on 32-pin part
- Pin 1 on 28-pin part
- J3 (A19/Vcc)
- Pin 1 on 32 pin part
- Not used on 28-pin part
- J4 (A17/Vcc)
- Pin 30 on 32-pin part
- Pin 28 on 28-pin part
- J5 (A18/Vcc)
- Pin 31 on 32-pin part
- Not used on 28-pin part
- J6 (A14/Vcc)
- Pin 29 on 32-pin part
- Pin 27 on 28-pin part
27C256/27C512 EPROMs
- 28 pin parts
- 27C256 jumpers (32B)
- A15: J2:1-2 (Vcc)
- A19: J3 - Not installed
- A17: J4:1-2 (Vcc)
- A18 J5 - Not installed
- A14: J6:2-3 (A14)
- 27C512 jumpers (64KB)
- A15: J2:2-3 (A15)
- A19: J3 - Not installed
- A17: J4::1-2 (Vcc)
- A18: J5 - Not installed
- A14 J6:2-3 (A14)
All EPROMs
Backplane
Mechanicals
Checkout
Rev 2
- Rev 2 PCB holes are good size
Rev 1
- Holes were very tight for ZIF pins
Assembly Sheet
- Interactive BOM
