---
title: "Playing With Electricity"
type: "article"
slug: "playing-with-electricity-14"
url: "http://localhost/article/playing-with-electricity-14/"
markdown_url: "http://localhost/article/playing-with-electricity-14.md"
published_at: "2026-03-09T20:00:52+00:00"
modified_at: "2026-03-09T20:00:53+00:00"
featured_image:
  url: "http://localhost/wp-content/uploads/2022/04/20230809-041332.jpg"
excerpt: "When I was in Seattle at the Sinclair Fest, I discovered people had questions about the memory layout of the QL. In particular, the command RESPR was not understood. The QL memory map has two aspects, what the hardware allows 8 what 0205 expects. The hardware aspect is straightforward; the 68008 has 20 address lines…"
category:
  - name: "Quantum Levels"
    slug: "quantum-levels"
    taxonomy: "category"
    url: "http://localhost/category/periodicals/quantum-levels/"
post_tag:
  - name: "QL"
    slug: "ql"
    taxonomy: "post_tag"
    url: "http://localhost/tag/ql/"
model:
  - name: "Sinclair QL"
    slug: "sinclair-ql"
    taxonomy: "model"
    url: "http://localhost/model/sinclair-ql/"
indiv:
  - name: "Harvey Taylor"
    slug: "harvey-taylor"
    taxonomy: "indiv"
    url: "http://localhost/indiv/harvey-taylor/"
publication_r:
  id: 52231
  title: "Quantum Levels"
  type: "periodical"
  url: "http://localhost/periodical/quantum-levels/"
authors_r:
  - name: "Harvey Taylor"
    slug: "harvey-taylor"
    taxonomy: "indiv"
    url: "http://localhost/indiv/harvey-taylor/"
volume: "2"
issue: "5"
issues_articles:
  - id: 52232
    title: "Quantum Levels v2 n5"
    type: "issue"
    url: "http://localhost/issue/quantum-levels-v2-n5/"
pages: "19-20"
pubdate: "June 1989"
archive_link: false
---

# Playing With Electricity

When I was in Seattle at the Sinclair Fest, I discovered people had questions about the memory layout of the QL. In particular, the command RESPR was not understood.

The QL memory map has two aspects, what the hardware allows 8 what 0205 expects. The hardware aspect is straightforward; the 68008 has 20 address lines which define a space of 1 million locations. These are arranged as shown in Table 0.