---
title: "ZX81/TS1000 8K ROM Upgrade"
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published_at: "2026-03-15T01:03:01+00:00"
modified_at: "2026-03-15T01:03:01+00:00"
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excerpt: "Glenn Read reviews Thomas J. Bent's 8K ROM upgrade for the ZX81 operating system, which comes with a new 8K ROM chip and thorough documentation. New features include faster power-up initialization, automatic FAST mode for command-line entries, faster scrolling and CLS, improved tape error recovery, support for larger arrays, and tidied character set glyphs. Known…"
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---

# ZX81/TS1000 8K ROM Upgrade

Glenn Read reviews Thomas J. Bent’s 8K ROM upgrade for the ZX81 operating system, which comes with a new 8K ROM chip and thorough documentation. New features include faster power-up initialization, automatic FAST mode for command-line entries, faster scrolling and CLS, improved tape error recovery, support for larger arrays, and tidied character set glyphs. Known bugs (LPRINT, DIVIDE) are also fixed.