Difference between revisions of "LB-MEM-04"
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== Features == | == Features == | ||
| − | * | + | * 32KB/128KB/512KB SRAM |
| − | * | + | ** Jumper for 28, 32-pin SRAMs |
| + | * 16KB/32KB/64KB EPROM | ||
** Headers to select PROM bank | ** Headers to select PROM bank | ||
* Connects to Address/Data and Memory control lines | * Connects to Address/Data and Memory control lines | ||
| − | * | + | * 50x71mm card |
== Design == | == Design == | ||
Latest revision as of 12:55, 16 October 2024
Contents
Features
- 32KB/128KB/512KB SRAM
- Jumper for 28, 32-pin SRAMs
- 16KB/32KB/64KB EPROM
- Headers to select PROM bank
- Connects to Address/Data and Memory control lines
- 50x71mm card
Design
SRAM
SRAM Pinouts
EPROM
- LB-65CXX-01 card has 16 KB PROM from 0xC000-0xFFFF
- LB-6809-01 card has 16 KB PROM from 0xC000-0xFFFF
- LB-Z80-01 card has 8KB PROM from 0x0000-0x1FFF (upper 8KB is not used)
27C256/27C512 EPROMs
- Card has a 16KB size
- 27C256 (32KB) and 27C512 (64KB) Flash EPROMs are commonly available
- Jumpers allow firmware banks to be selected
- 2 banks in 27C256
- 4 banks in 27C512
Backplane Connector
Mechanicals
Checkout
Rev 1
- OK
