Model 100 RAM: Difference between revisions
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==Past== | ==Past== | ||
There have been many 3rd party ram modules over the years. Here are just a few examples. | |||
Strangely, although these are NEC modules with an NEC sram chip, and they do work in the NEC PC-8201/8201A, | |||
[https://goo.gl/photos/gGVSWwGiv9NSwveR7 NEC 72404582]<br> | * 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?<br> | |||
<!--[https://goo.gl/photos/gGVSWwGiv9NSwveR7 NEC 72404582]<br> --> | |||
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http://ebay.com/itm/251666092812 (sold out now) | http://ebay.com/itm/251666092812 (sold out now) | ||
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http://www.electronicbeetle.eu/beetle/ICS/memory/RAM%20SRAM/SRAM%2008kx8%20Module%20D4364G-15L.pdf | http://www.electronicbeetle.eu/beetle/ICS/memory/RAM%20SRAM/SRAM%2008kx8%20Module%20D4364G-15L.pdf | ||
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[[File:SRAM 08kx8 Module D4364G-15L 2.jpg|thumb]] | |||
Components: | Components: | ||
:NEC D4364G-15L | :NEC D4364G-15L | ||
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* Purple Computing | * Purple Computing | ||
[[File:Purple Computing RAM Module.jpg|thumb]] | |||
==Other== | ==Other== | ||
Revision as of 13:37, 20 April 2021
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.