Difference between revisions of "LB-MEM-04"
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Blwikiadmin (talk | contribs) (Created page with "file:LB-MEM-04_REV1-FRONT-3D.png == Features == * 32/128KB/512KB SRAM * 16/32/64KB EPROM ** Headers to select PROM bank * Connects to Address/Data and Memory control lin...") |
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* [[LB-6809-01]] 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) | * [[LB-Z80-01]] card has 8KB PROM from 0x0000-0x1FFF (upper 8KB is not used) | ||
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==== 27C256/27C512 EPROMs ==== | ==== 27C256/27C512 EPROMs ==== | ||
Revision as of 01:21, 25 August 2024
Contents
Features
- 32/128KB/512KB SRAM
- 16/32/64KB EPROM
- Headers to select PROM bank
- Connects to Address/Data and Memory control lines
- 50x75mm card
Design
SRAM
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
File:LB-MEM-04 EPROM 27C256 512.PNG
Backplane Connector
Mechanicals
Checkout
Rev 1
- OK
