LB-MEM-04

From Land Boards Wiki
Revision as of 12:55, 16 October 2024 by Blwikiadmin (talk | contribs) (→‎Features)
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)
Jump to navigation Jump to search

LB-MEM-04 REV1-FRONT-3D.png


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

LB-MEM-04-SRAM.PNG

SRAM Pinouts

SRAM PINOUTS-03.png

EPROM

LB-MEM-04-PROM.PNG

  • 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

LB-MEM-03 EPROM 27C256 512.PNG

Backplane Connector

LB-MEM-04-BKPL.PNG

Mechanicals

LB-MEM-04 REV1 MECH.PNG

Checkout

Rev 1

  • OK

Assembly Sheet

Rev 1

Retrieved from "http://land-boards.com/blwiki/index.php?title=LB-MEM-04&oldid=27358"