Model 200 RAM: Difference between revisions
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[[File:TANDY_26-3866.svg|frameless|link={{filepath:TANDY_26-3866.svg}}]] | [[File:TANDY_26-3866.svg|frameless|link={{filepath:TANDY_26-3866.svg}}]] | ||
=DIY Modern | =DIY Modern Replacments= | ||
https://github.com/bkw777/TANDY_200_RAM | https://github.com/bkw777/TANDY_200_RAM | ||
<gallery> | |||
File:TANDY_200_RAM.jpg | |||
File:TANDY_200_Dual_RAM.jpg | |||
File:TANDY_200_Dual_RAM_tsop_14mm.jpg | |||
</gallery> | |||
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Revision as of 18:46, 18 September 2022
The model 200 comes with 24k built in, and supports up to 2 more banks of 24k in the form of ceramic dip modules that plug into the Option RAM #1 & #2 sockets.
TANDY 26-3866
The original 24K module was Catalog Number 26-3866.
This is a ceramic DIP carrier with 3 8k sram chips and a 40H138 to decode A13 & A14 into 3 different /CS for the individual SRAM chips.
DIY Modern Replacments
https://github.com/bkw777/TANDY_200_RAM
More info
https://archive.org/details/Model_200_Portable_Computer_Service_Manual_19xx_Tandy/page/n75/mode/2up