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TRS-80 Model 100/102/200 Option ROM reader

bkw777·aDIPters

TRS-80 Model 100/102/200 Option ROM reader PCB layout, top view — open source board by bkw777
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About the TRS-80 Model 100/102/200 Option ROM reader PCB

TRS-80 Model 100/102/200 Option ROM reader is an open source PCB design by bkw777, published on GitHub under the CC-BY-SA-4.0 license. It is a 2-layer board measuring 49.5 × 19.1 mm, with 6 components from 6 distinct parts.

By type, the board carries 4 jumpers and 2 connectors.

It belongs with the retro computing designs in this gallery.

From the project

PCBs to plug various newer SMT parts into vintage DIP sockets. Generaly to use a newer PLCC, SOIC, or TSOP EEPROM or Flash part to replace a DIP mask ROM or UV EPROM in a vintage computer.

Most of the PCBs have holes that are intentionally too small to use standard pin headers for the DIP legs. Here is how to do the legs: https://gist.github.com/bkw777/52d85d89eeff8445cc667685d05ea94d It's less convenient than generic pin headers but the point is for the legs to be as thin as the DIP legs they are emulating so as not to damage sockets, and to have the replacement "chip" be low profile without the big isulator & shoulder block taking up space so the replacement chip fits in more places.

TRS-80 Model 100/102/200 Option ROM reader, from the project README
From the project README

TRS-80 Model 100/102/200 Option ROM reader bill of materials (BOM)

6 components, 6 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
27C256 pinout to programmer
J1
1
Model 100/102/200 Option ROM Socket
J2
1
GND
JP1
1
VPP
JP2
1
VCC
JP3
1
~{CE}
JP4

TRS-80 Model 100/102/200 Option ROM reader design files

The KiCad project lives in the bkw777/aDIPters repository on GitHub; these links point at the commit this page was built from.

TRS-80 Model 100/102/200 Option ROM reader: common questions

How big is the TRS-80 Model 100/102/200 Option ROM reader PCB?

The TRS-80 Model 100/102/200 Option ROM reader measures 49.5 × 19.1 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the TRS-80 Model 100/102/200 Option ROM reader?

6 components, from 6 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the TRS-80 Model 100/102/200 Option ROM reader design files?

From the bkw777/aDIPters repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.

Can I use the TRS-80 Model 100/102/200 Option ROM reader design in my own project?

Yes, under the terms of its CC-BY-SA-4.0 license, which bkw777 chose for the repository.

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