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---
title: SEMI-TECH (STM) Pied Piper
categories:
- Computers
types:
- Professional Computer
origins:
- U.S.A.
years:
- '1983'
cpus:
- Zilog Z80A
params:
name: Pied Piper
image: /media/museum/photos/semitech_piedpiper_system_s2.jpg
company: /companies/semi-tech-stm
company_name: SEMI-TECH (STM)
specs:
- label: NAME
value: Pied Piper
- label: MANUFACTURER
value: Semi-Tech (STM)
- label: TYPE
value: Professional Computer
- label: ORIGIN
value: U.S.A.
- label: YEAR
value: May 1983
- label: BUILT IN LANGUAGE
value: None
- label: KEYBOARD
value: Typewriter keyboard, QWERTY, 62 keys
- label: CPU
value: Zilog Z80A
- label: SPEED
value: 4 MHZ
- label: RAM
value: 64 kb
- label: VRAM
value: 2 KB
- label: ROM
value: 8 KB
- label: TEXT MODES
value: 40 or 80 columns x 24 lines
- label: GRAPHIC MODES
value: None
- label: COLORS
value: '16'
- label: SOUND
value: None
- label: SIZE / WEIGHT
value: 51 (W) x 27 (D) x 10 (H) cm / 6.25 Kg.
- label: I/O PORTS
value: serial / parallel port , RF Modulator
- label: BUILT IN MEDIA
value: 5.25'' disk-drive (720kb)
- label: OS
value: CP/M 2.2
- label: POWER SUPPLY
value: Built in power supply unit
- label: PERIPHERALS
value: External 5.25 floppy drive, internal RAM card and modem card, Hard disk interface
- label: PRICE
value: $1299 (1983)
tabs:
- photos
- adverts
forum_thread: 203
photos:
- title: LARGE VIEW
subtitle: ''
text: ''
image: /media/museum/photos/semitech_piedpiper_system_s1.jpg
- title: LEFT SIDE
subtitle: ''
text: ''
image: /media/museum/photos/semitech_piedpiper_leftside_s1.jpg
- title: RIGHT SIDE
subtitle: ''
text: ''
image: /media/museum/photos/semitech_piedpiper_rightside_s1.jpg
- title: SECOND FDD
subtitle: ''
text: With external 5.25" FDD unit
image: /media/museum/photos/semitech_piedpiper_dualdrive_s1.jpg
- title: BACK SIDE
subtitle: ''
text: |-
**(1)** External fllopy drive unit connector\
**(2)** Z80 bus connector\
**(3)** Reset switch\
**(4)** Serial port DIN socket\
**(5)** Parallel printer connector\
**(6)** Optional Modem card location\
**(7)** Power switch and socket
image: /media/museum/photos/semitech_piedpiper_backside_s1.jpg
- title: 'INSIDE #1'
subtitle: ''
text: |-
**(1)** Switching power supply unit\
**(2)** Video chip (unknown reference)\
**(3)** Nec 8279 Keyboard/Display interface chip\
**(4)** Keyboard connector\
**(5)** Z80 processor, here a SGS version\
**(6)** 2 KB Video RAM - 4 x 2114 chips\
**(7)** Internal expansion connectors for modem and RAM cards\
**(8)** 64 KB main RAM - 8 x 4164 chips\
**(9)** FDD controller chip and connector
image: /media/museum/photos/semitech_piedpiper_inside_s1.jpg
- title: 'INSIDE #2'
subtitle: ''
text: RAM, ROM and FD controller chips.
image: /media/museum/photos/semitech_piedpiper_inside_s2.jpg
- title: 'INSIDE #3'
subtitle: ''
text: Complete system with Mitsubishi 5.25" floppy disk drive installed.
image: /media/museum/photos/semitech_piedpiper_inside_s3.jpg
- title: MANUALS
subtitle: ''
text: User and 'Perfect' suite manuals
image: /media/museum/photos/semitech_piedpiper_manuals_s1.jpg
- title: ORIGINAL MODEL
subtitle: ''
text: To be franck, the Pied Piper model we own isn't as clean as the above pictures. We had to 'slightly' retouch them...
image: /media/museum/photos/semitech_piedpiper_realsystem_s1.jpg
- title: CLONE
subtitle: ''
text: In 1985, a company called STM took up the design of the Pied Piper to make a PC compatible system. The detachable keyboard covered a LCD display. The system also featured a built-in printer. It had a very short life.
image: /media/museum/photos/semitech_piedpiper_clone_s1.jpg
- title: SEMI-TECH BUILDING
subtitle: ''
text: |-
Semi-Tech building (Markham Ontario Canada).\
The whole 3 story building and land were belonged to Semi Tech until the company went bankrupt.
**Steve Otsuka** who worked for Semi Tech during 1982-1987 says:\
We were cash rich (over $100M), and bought a mainframe computer from Control Data which occupied one floor, mini-computer from DEC VAX series, expensive paintings, old China collectibles. Inside Semi Tech there were people with creative brains including myself (sorry to say this but I was a key engineer) and some of the most advanced projects in North America that time which you would be surprised.
Thanks to **Steve Otsuka** for information and picture.
image: /media/museum/photos/semitech_building_s1.jpg
adverts:
- title: 'SEMI-TECH BROCHURE #1'
subtitle: ''
text: ''
image: /media/museum/pubs/semitech_piedpiper_brochure_s1.jpg
- title: 'SEMI-TECH BROCHURE #2'
subtitle: ''
text: ''
image: /media/museum/pubs/semitech_piedpiper_brochure_s2.jpg
- title: US ADVERT (MAY 1983)
subtitle: ''
text: No info in this advert about the display that could be used (TV, composite, colour, B/W?)
image: /media/museum/pubs/smt_piedpiper_pub_1982%5B2%5D.jpg
- title: NEW ZEALAND REVIEW
subtitle: ''
text: |-
Review from a New Zealand magazine. Notice the prices in Australian$ at the bottom right of the page.
Thanks to **Murray Moffatt** from New Zealand
image: /media/museum/pubs/semitech_piedpiper_pub_s2.jpg
- title: UK ADVERT, OCT. 1983
subtitle: ''
text: ''
image: /media/museum/pubs/semitech_piedpiper_pub_s1.jpg
oc_id: 193
source:
url: https://web.archive.org/web/20230608213119/http://www.old-computers.com/museum/computer.asp?c=193
date: '2023-06-08'
---
Not much is known about this small computer, designed in Canada and presented at the 1983 NCC show (Anaheim, California), in May. It was marketed then as a portable computer! Quite strange as when you have look at the picture, it looks more like a desktop computer, no built-in screen... In fact it had a handle on the back and a plastic cover for the keyboard. One could carry it like a briefcase. You still needed a monitor (TV) at the other location, however...
Anyway, the Pied Piper apparently didn't last long. All we know is that it was intended to be marketed in the US, at $1300. It was based upon a Z80 CPU, had a 5''1/4 disk-drive built-in (720 KB) and used CP/M. It was sold with a complete "Perfect Software" package.\
The modem card was optional, manufacturered in Hong Kong at Semi Tech Hong Kong Ltd.
According to **Terry Danyleyko** who worked for Semi Tech, 1000 pieces were sold to China. A Chinese CP/M was even written specially for the Pied Piper.
---
**Tim Gieseler** reports :\
I sold ONE pied-piper at my short-lived computer store around 1983-4. There was nothing portable about it, but it was a smallish CP/M machine distinguished by it's use of a standard video monitor (none was supplied) and an unusually large single floppy drive compared to the Eagle/Kaypro/TRS-80s of the day. It was able to read/write many of the numerous floppy formats, as well.
The "Perfect" software, same as supplied by Kaypro, was universally horrible, buggy, barely functional - but heavily promoted by the manufacture and bundled by many computer makers.