Microprofessor I.
Microprofessor I (MPF 1) is a single-board computer that was launched on the market in 1981. The computer was manufactured by the Taiwanese company Multitech (now Acer ). It is probably one of the longest-selling computers that has not been changed since it went on sale. The MPF I was an easy to use training system for the Z80 - microprocessor from Zilog with a clock frequency of 1.79 MHz. The computer was equipped with a RAM of 2 KB (expandable up to 4 KB) and a ROM of 2 KB (expandable up to 8 KB). The successors to the computer were Microprofessor Ib (which also had a BASIC- ROM and, as an alternative to assembler, allowed programming in this high-level language), Microprofessor II and Microprofessor III .
- I / O port: PIO (Programmable Input / Output) port 8255 , a total of 24 parallel I / O lines
- I / O address: 00–03. PIO, a total of 16 parallel I / O lines
- I / O address: 80–83h Programmable CTC (timer unit), a total of four independent timing controls
- I / O address: 40–43h
- Display: six-digit, red seven-segment - LED display, 1.7 cm
- Keyboard: 36 keys consisting of 19 function keys, 16 hexadecimal keys and one freely programmable key.
- Loudspeaker: built-in, diameter 57 mm, approx. 200-10,000 Hz .
- Expansion area: 8.9 cm × 3.5 cm areas are provided on the circuit board for any expansion.
- Tape interface: connection options for any tape recorder , data rate 165 bit / s.
- System frequency: 3.58 MHz quartz , divider 1: 2, pulse duration approx. 0.56 µs .
- Supply voltage: 5–12 V, 500 mA.
To date, the computer is manufactured and sold by Flite Electronics International.
In Germany, the micro-professor was sold for a long time by the teaching material provider Christiani .
Expansion options
Numerous expansion boards and chips were available for the MPF-I:
- MPF-BASIC
- Voice output for English words and numbers
- EPROM program unit, writing instrument
- Output board for LED and stepper motor control
- VHS output board for the television
- The rare Swiss Elepra additional board for automation tasks
successor
- Microprofessor MPF-I Plus (1982) with QWERTY keyboard and 20-digit display
- Microkit 09 (1983) 6809 CPU
- MPF-I / 65 (1984) 6502 CPU
- MPF-I / 88 (1985) 8088 CPU
- Microprofessor II
- Microprofessor III
Web links
- Microprofessor I at old-computers.com
- Private fan page on the microprofessor MPR I ( Memento from January 3, 2009 in the Internet Archive )
- Flite Electronics - International seller of the Microprofessor Training System
- Manuals, schemes, ROM content for the microprofessor
- MPF-I USER'S MANUAL (PDF Scan)
- The microprofessor MPF-1B