Model 200 RAM: Difference between revisions
Jump to navigation
Jump to search
No edit summary |
|||
| (10 intermediate revisions by the same user not shown) | |||
| Line 1: | Line 1: | ||
The model 200 comes with 24k built in, and supports up to | 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.<br> | |||
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. | |||
[[File:TANDY_26-3866_top.jpg|200px|link={{filepath:TANDY_26-3866_top.jpg}}]] | |||
[[File:TANDY_26-3866_bottom.jpg|200px|link={{filepath:TANDY_26-3866_bottom.jpg}}]] | |||
[[File:TANDY_26-3866.svg|frameless|link={{filepath:TANDY_26-3866.svg}}]] | |||
=Modern Replacements= | |||
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> | |||
<!-- -- all dead links now -- | |||
This module, designed by Steven Adolph, adds both possible optional 24K banks, for a total of 3 banks when installed. | This module, designed by Steven Adolph, adds both possible optional 24K banks, for a total of 3 banks when installed. | ||
| Line 37: | Line 56: | ||
[https://photos.app.goo.gl/g1G4bo6FbjJSgcqU2 More Pics] | [https://photos.app.goo.gl/g1G4bo6FbjJSgcqU2 More Pics] | ||
More info | --> | ||
=More info= | |||
https://archive.org/details/Model_200_Portable_Computer_Service_Manual_19xx_Tandy/page/n75/mode/2up | |||
http://bitchin100.com/wiki/index.php?title=Tandy_200_RAM | http://bitchin100.com/wiki/index.php?title=Tandy_200_RAM | ||
Latest revision as of 19:38, 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.
Modern Replacements
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