---
title: "PC8300 ZX81/TS1000 Clone Hardware Examination"
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published_at: "2026-03-15T00:19:19+00:00"
modified_at: "2026-03-15T00:19:19+00:00"
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excerpt: "Detailed physical and electrical examination of the PC8300 TS1000 clone from American Design Components. Covers case dimensions, keyboard (42 keys), chip complement (Z80 CPU, c4005 ULA, AMI 8444 ROM, TMM 2216 RAM), external bus compatibility with ZX81/TS1000, and the author's repair experience after accidental reverse-polarity power damage. Notes machine code programs cause a looping problem."
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volume: "5"
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pages: "3"
pubdate: "April 1987"
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---

# PC8300 ZX81/TS1000 Clone Hardware Examination

Detailed physical and electrical examination of the PC8300 TS1000 clone from American Design Components. Covers case dimensions, keyboard (42 keys), chip complement (Z80 CPU, c4005 ULA, AMI 8444 ROM, TMM 2216 RAM), external bus compatibility with ZX81/TS1000, and the author’s repair experience after accidental reverse-polarity power damage. Notes machine code programs cause a looping problem.