---
title: "Build a Spectrum ROM Switching Circuit for Your TS2068"
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markdown_url: "http://localhost/article/build-a-spectrum-rom-switching-circuit-for-your-ts2068.md"
published_at: "2026-01-19T20:40:21+00:00"
modified_at: "2026-01-19T20:40:37+00:00"
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  url: "http://localhost/wp-content/uploads/2022/04/20230809-041332.jpg"
excerpt: "I recently purchased some Spectrum ROMs from Zebra Systems with the hope that I might be able to make my own Spectrum rom switching circuit without paying the high price of those circuits that are commercially available. When I examined the TS-2068's ROM circuitry, I realized that this was an easier task than I had…"
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model:
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  - name: "Gary Lessenberry"
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  title: "CATS Newsletter"
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  - name: "Gary Lessenberry"
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volume: "6"
issue: "9-10"
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    title: "CATS v6 n9/10"
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pubdate: "February/March 1989"
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---

# Build a Spectrum ROM Switching Circuit for Your TS2068

I recently purchased some Spectrum ROMs from [Zebra Systems](http://localhost/company/zebra-systems/) with the hope that I might be able to make my own Spectrum rom switching circuit without paying the high price of those circuits that are commercially available. When I examined the TS-2068’s ROM circuitry, I realized that this was an easier task than I had originally assumed! All that I needed was: a Spectrum ROM, an SPDT toggle switch (Radio Shack #275-6725), two feet of insulated wire and two 1ØK ohm resistors (Radio Shack #271-133)