FlexROM 102: Difference between revisions

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FlexROM main rom for Tandy Model 102
=EEPROM adapter for Tandy Model 102 system rom=
With REX main rom support.
 
Use this version also for late-model 100's that don't have the non-standard main rom pinout. (If you have a Model 100, and the main rm is NOT a LH535618, then use this instead of FlexROM_100)
 
Use this version also for NEC PC-8201/PC8201A


<gallery>
<gallery>
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FlexROM_102-02.png
FlexROM_102-02.png
FlexROM_102-01.png
FlexROM_102-01.png
FlexROM_102-08.jpg
FlexROM_102-09.jpg
FlexROM_102-10.jpg
FlexROM_102-11.jpg
FlexROM_102-12.jpg
FlexROM_102-13.jpg
FlexROM_102-14.jpg
FlexROM_102-15.jpg
FlexROM_102-16.jpg
</gallery>
== Updated Version ==
Now programmable without SOIC28 test clip.
<gallery>
FlexROM_102_1.jpg
FlexROM_102_2.jpg
</gallery>
</gallery>


[https://oshpark.com/shared_projects/AHFgHU9r PCB from OSHPark]
PCB: https://oshpark.com/shared_projects/UWjAMPF8
 
BOM: https://www.digikey.com/short/zv51fz
 
You will also need a dip-28 0.6" socket to install on the mainboard https://www.digikey.com/short/zdb570
 
KiCAD schematic and pcb sources: https://github.com/bkw777/aDIPters
 
Directions all the same as [[FlexROM_100]], except in addition you have to desolder the system rom from the mainboard and install a DIP28-0.6" socket in it's place.


Parts and directions (except for the PCB) all the same as [[FlexROM_100]]
I HIGHLY suggest using ChipQuick or FastChip desoldring alloy to desolder the original rom chip to avoid damaging the mainboard. https://www.amazon.com/dp/B015RV4NBS

Latest revision as of 03:25, 4 December 2020

EEPROM adapter for Tandy Model 102 system rom

With REX main rom support.

Use this version also for late-model 100's that don't have the non-standard main rom pinout. (If you have a Model 100, and the main rm is NOT a LH535618, then use this instead of FlexROM_100)

Use this version also for NEC PC-8201/PC8201A

Updated Version

Now programmable without SOIC28 test clip.

PCB: https://oshpark.com/shared_projects/UWjAMPF8

BOM: https://www.digikey.com/short/zv51fz

You will also need a dip-28 0.6" socket to install on the mainboard https://www.digikey.com/short/zdb570

KiCAD schematic and pcb sources: https://github.com/bkw777/aDIPters

Directions all the same as FlexROM_100, except in addition you have to desolder the system rom from the mainboard and install a DIP28-0.6" socket in it's place.

I HIGHLY suggest using ChipQuick or FastChip desoldring alloy to desolder the original rom chip to avoid damaging the mainboard. https://www.amazon.com/dp/B015RV4NBS