---
title: "Delta Device"
id: 37056
type: "product"
slug: "delta-device"
url: "http://localhost/product/delta-device/"
markdown_url: "http://localhost/product/delta-device.md"
published_at: "2021-07-15T23:32:06+00:00"
modified_at: "2026-03-22T13:12:58+00:00"
author: "David Anderson"
featured_image:
  url: "http://localhost/wp-content/uploads/2022/04/20230809-041332.jpg"
excerpt: "Non-volatile memory designed by Wilf Rigter. 32K RAM with Rigter Operating System (ROS). File-handling system in less than 600 bytes. Includes: DIRECTORY: displays all programs stored in memory by name and length in bytes. 44 entries per directory. SAVE: transfers BASIC programs, variables, and machine code to storage. Works in conjunction with the NAME/RENAME features.…"
category:
  - name: "RAM"
    slug: "ram"
    taxonomy: "category"
    url: "http://localhost/category/hardware/ram/"
post_tag:
  - name: "TS 1000"
    slug: "ts1000"
    taxonomy: "post_tag"
    url: "http://localhost/tag/ts1000/"
  - name: "Weymil Corporation"
    slug: "weymil-corporation"
    taxonomy: "post_tag"
    url: "http://localhost/tag/weymil-corporation/"
model:
  - name: "Timex/Sinclair 1000"
    slug: "ts-1000"
    taxonomy: "model"
    url: "http://localhost/model/ts-1000/"
indiv:
  - name: "Wilf Rigter"
    slug: "wilf-rigter"
    taxonomy: "indiv"
    url: "http://localhost/indiv/wilf-rigter/"
genre:
  - name: "Hardware"
    slug: "hardware"
    taxonomy: "genre"
    url: "http://localhost/type/hardware/"
  - name: "RAM"
    slug: "ram"
    taxonomy: "genre"
    url: "http://localhost/type/ram/"
company:
  id: 11440
  title: "Weymil Corporation"
  type: "company"
  url: "http://localhost/company/weymil-corporation/"
price: 75
date: 1985
rarity: "Uncommon"
adverts:
  - publication:
      - id: 26784
        title: "Time Designs Magazine v3 n6"
        type: "issue"
        url: "http://localhost/issue/time-designs-magazine-v3-n6/"
    advert_page: "43"
companies_products:
  - id: 11440
    title: "Weymil Corporation"
    type: "company"
    url: "http://localhost/company/weymil-corporation/"
---

# Delta Device

Non-volatile memory designed by Wilf Rigter. 32K RAM with Rigter Operating System (ROS). File-handling system in less than 600 bytes. Includes:

- DIRECTORY: displays all programs stored in memory by name and length in bytes. 44 entries per directory.
- SAVE: transfers BASIC programs, variables, and machine code to storage. Works in conjunction with the NAME/RENAME features.
- LOAD: transfers programs to normal RUN areas.
- MERGE: join two BASIC programs or variable files.
- EXIT: quit ROS to an auto-run program or the command line.
- ERASE: deletes programs from system memory and automatically moves other programs to fill the space left behind.

Built-in write protect switch to avoid accidental erasure of data. 32K is divided in four 8K blocks which are individually controlled via DIP switch for mapping to various memory map locations.

Manual includes instructions for adding more directories and “hot keys.”