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website/content/museum/quay-corporation-500-series.md
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Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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Markdown

---
title: QUAY Corporation 500 Series
categories:
- Computers
types:
- Professional Computer
origins:
- U.S.A.
years:
- '1980'
cpus:
- Z-80A
params:
name: 500 Series
company: /companies/quay-corporation
company_name: QUAY Corporation
specs:
- label: NAME
value: 500 Series
- label: MANUFACTURER
value: QUAY Corporation
- label: TYPE
value: Professional Computer
- label: ORIGIN
value: U.S.A.
- label: YEAR
value: '1980'
- label: END OF PRODUCTION
value: '1989'
- label: BUILT IN LANGUAGE
value: None
- label: KEYBOARD
value: Depends on the terminal used
- label: CPU
value: Z-80A
- label: SPEED
value: 4 Mhz.
- label: RAM
value: 32 KB expandable up to 64 KB
- label: TEXT MODES
value: Video terminal
- label: SIZE / WEIGHT
value: 16" x 18" x 6"
- label: I/O PORTS
value: Disc Drive Expansion connector, 3 x Serial Ports, Parallel printer connector
- label: BUILT IN MEDIA
value: Dual 200 KB or 400 KB floppy drives
- label: OS
value: CP/M
- label: POWER SUPPLY
value: Built-in P.S.U.
- label: PERIPHERALS
value: RS232C & TTY serial port compatible product
- label: PRICE
value: |-
Model 500 : $2500\
Model 520 : $4600 list (but usually sold to OEM's for 30%-40% - $3200 less)
tabs:
- photos
- adverts
photos:
- title: MODEL 520
subtitle: ''
text: Thanks to Phillip Good for this picture
image: null
- title: LEFT SIDE
subtitle: ''
text: Thanks to Phillip Good for this picture
image: null
- title: REAR
subtitle: ''
text: |-
From left to right:
\- big fan\
\- disc drive expanson connector\
\- 3 x serial ports\
\- parallel line printer connector
Thanks to Phillip Good for this picture
image: null
- title: INSIDE MODEL 520
subtitle: ''
text: Thanks to Phillip Good for this picture
image: null
- title: MODEL 500
subtitle: ''
text: ''
image: null
adverts:
- title: U.S. ADVERT (1980)
subtitle: ''
text: |-
Advert said:
The facts speak for themselves. The QUAY 500 SERIES offers more for the money than North Star Horizon computers...
...The bottom line is simple. There is a new star in the computer field. The 500 SERIES by Quay. It outshines all of the competition.
A little pretentious tone!
image: null
oc_id: 577
source:
url: https://web.archive.org/web/20230323152424/http://www.old-computers.com/museum/computer.asp?c=577
date: '2023-03-23'
---
The QUAY 500 was a clone of the [North Star Horizon](/museum/northstar-horizon/) offering some technical improvements compared to its competitor: a standalone single-board instead of a backplane and several S-100 boards, Direct Memory Access for better disk access performance, on-board expansion capabilities for additional parallel and serial port and higher disk capacity.
The 500 model was sold with two 200 KB double density 5"1/4 floppy drives, the 520 model with two quad density 400 KB drives.
In spite of these technical advantages and a price 20% lower than North Star's similar models, the Quay 500 series do not seem to have been marketed for long.
**Phillip Good** comments:\
The Quay computer was not sold to consumers but to OEM's who would package it around some kind of accounting package and sell it to professionals--accountants, dentists, physicians, and so forth for use in their offices. Its wooden case was intended and succeeded in making it look professional in contrast to the rinky tink plastic and metal contraptions which are standard today.