Model 100 RAM

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Revision as of 13:37, 20 April 2021 by Bkw (talk | contribs) (→‎Past)
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Buy

Francesco Messineo
GGLABS M10MEM

Build

https://github.com/bkw777/Model_T_RAM
Stardust SMT
Stardust DIP
Francesco Messineo
GGLABS M10MEM

Past

There have been many 3rd party ram modules over the years. Here are just a few examples.

  • NEC

Strangely, although these are NEC modules with an NEC sram chip, and they do work in the NEC PC-8201/8201A, most (all?) PC-8201 came with the same ceramic modules as the TRS-80 Model 100. Which begs the question what they were made for if not to go into PC-8201 / PC-8201A?

Components:

NEC D4364G-15L
TIHC148 (aka 74HC148)
  • Purple Computing

Other

There are also ram expansion accessories that connect to the system bus and either add extra banks of 32k to the internal ram, or replace the internal ram. These aren't normal ram modules that plug into the normal ram sockets. They plug in to the system bus cnnector and provide the entire 32K address space at once from there, as if all ram sockets were filled.

QUAD
PGDesigns
PCSG
REXCPM