Difference between revisions of "LB-MEM-02"

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==== 27C256/27C512 EPROMs ====
 
==== 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-03_EPROM_27C256_512.PNG]]
 
[[file:LB-MEM-03_EPROM_27C256_512.PNG]]

Revision as of 11:53, 21 August 2024

LB-MEM-02 REV1-FRONT-3D.png

  • 32KB SRAM
  • EPROM
    • Headers to jump for smaller cards
  • Connects to Address/Data and Memory control lines
  • 50x75mm card

Design

SRAM

LB-MEM-02-SRAM.PNG

EPROM

LB-MEM-02-PROM.PNG

Rev 1 Parts/Jumpers

LB-MEM-02 REV1 MECH Ann.png

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

LB-MEM-03 EPROM 27C256 512.PNG

Backplane Connector

LB-MEM-02-BKPL.PNG

Mechanicals

Checkout

Rev 1

  • OK

Assembly Sheet

Rev 1