---
title: "CAI Stringy Floppy Modification for A&J Interface / ESFOA SIG Announcement"
type: "article"
slug: "cai-stringy-floppy-modification-for-aj-interface-esfoa-sig-announcement"
url: "http://localhost/article/cai-stringy-floppy-modification-for-aj-interface-esfoa-sig-announcement/"
markdown_url: "http://localhost/article/cai-stringy-floppy-modification-for-aj-interface-esfoa-sig-announcement.md"
published_at: "2026-03-13T23:55:14+00:00"
modified_at: "2026-03-13T23:55:14+00:00"
featured_image:
  url: "http://localhost/wp-content/uploads/2022/04/20230809-041332.jpg"
excerpt: "Instructions for modifying a CAI Stringy Floppy drive to work with the A&J (4K ROM) interface: one trace must be cut from connector CN pin 7, and a jumper added from CN pin 7 to IC7 pin 26 to supply 5V power from the A&J drive unit. If one A&J drive already powers the interface,…"
category:
  - name: "Timelinez"
    slug: "timelinez"
    taxonomy: "category"
    url: "http://localhost/category/periodicals/timelinez/"
post_tag:
  - name: "Hardware project"
    slug: "hardware-project"
    taxonomy: "post_tag"
    url: "http://localhost/tag/hardware-project/"
  - name: "TS 1000"
    slug: "ts1000"
    taxonomy: "post_tag"
    url: "http://localhost/tag/ts1000/"
model:
  - name: "Timex/Sinclair 1000"
    slug: "ts-1000"
    taxonomy: "model"
    url: "http://localhost/model/ts-1000/"
indiv:
  - name: "Bill Miller"
    slug: "bill-miller"
    taxonomy: "indiv"
    url: "http://localhost/indiv/bill-miller/"
publication_r:
  id: 21571
  title: "Timelinez"
  type: "periodical"
  url: "http://localhost/periodical/timelinez/"
authors_r:
  - name: "Bill Miller"
    slug: "bill-miller"
    taxonomy: "indiv"
    url: "http://localhost/indiv/bill-miller/"
volume: "2"
issue: "6"
issues_articles:
  - id: 38803
    title: "Timelinez v2 n6"
    type: "issue"
    url: "http://localhost/issue/timelinez-v2-n6/"
pages: "7"
pubdate: "June 1984"
archive_link: false
---

Instructions for modifying a CAI Stringy Floppy drive to work with the A&J (4K ROM) interface: one trace must be cut from connector CN pin 7, and a jumper added from CN pin 7 to IC7 pin 26 to supply 5V power from the A&J drive unit. If one A&J drive already powers the interface, the CAI drive can serve as a second drive by changing the drive selection jumper. Accompanied by an announcement for an ESFOA (Exatron Stringy Floppy Owners Association) Sinclair SIG for owners of CAL-Z or Exatron Stringy Floppies on TS1000/1500.