---
title: "ZX81/TS1000 8K ROM Upgrade"
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published_at: "2026-03-15T00:58:41+00:00"
modified_at: "2026-03-15T00:58:41+00:00"
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excerpt: "Glenn Read reviews Thomas J. Bent's 8K ROM upgrade for the ZX81 operating system, covering improvements in initialization speed, automatic FAST mode for command entry, faster scrolling, improved tape error recovery, large-array support, and character set corrections. Known bugs in LPRINT and DIVIDE are fixed. (Same article reprinted from May 1987 issue.)"
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    title: "Timex Sinclair Users Group Mile High Chapter Sep 1987"
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pages: "6"
pubdate: "Sep 1987"
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---

# ZX81/TS1000 8K ROM Upgrade

Glenn Read reviews Thomas J. Bent’s 8K ROM upgrade for the ZX81 operating system, covering improvements in initialization speed, automatic FAST mode for command entry, faster scrolling, improved tape error recovery, large-array support, and character set corrections. Known bugs in LPRINT and DIVIDE are fixed. (Same article reprinted from May 1987 issue.)