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---
title: KOSMOS CP1 / Computer Praxis
categories:
- Computers
types:
- Home Computer
origins:
- Germany
years:
- '1980'
cpus:
- '8049'
params:
name: CP1 / Computer Praxis
image: /media/museum/photos/kosmos_z80-training-kit_1.jpg
company: /companies/kosmos
company_name: KOSMOS
specs:
- label: NAME
value: CP1 / Computer Praxis
- label: MANUFACTURER
value: Kosmos
- label: TYPE
value: Home Computer
- label: ORIGIN
value: Germany
- label: YEAR
value: ? 1980
- label: BUILT IN LANGUAGE
value: Machine code
- label: KEYBOARD
value: Membrane keyboard, 57 keys
- label: CPU
value: 8049 (8-bit)
- label: SPEED
value: 6 Mhz
- label: CO-PROCESSOR
value: 8155 (I/O)
- label: RAM
value: 256 bytes
- label: ROM
value: Unknown
- label: TEXT MODES
value: Small LED display
- label: GRAPHIC MODES
value: None
- label: COLORS
value: None
- label: SOUND
value: None
- label: POWER SUPPLY
value: External PSU, 8-14v
forum_thread: 488
oc_id: 494
source:
url: https://web.archive.org/web/20221203195223/http://www.old-computers.com/museum/computer.asp?c=494
date: '2022-12-03'
---
Little is known about this german training kit...
The Computer is programmed with simple numbers for adding, running loops and so on, but it's not possible to program the cpu directly.
**Chriz** tells us :\
I own a kosmos cp1 and it's still functioning. It has a very good manual which is kind of a machine language course for the cp1-inctructions. The cpu was a 8049 (8bit) with 2048 byte rom and 128 byte ram integrated (6 Mhz) and the memory+io chip a 8155 with 256 byte ram and 22 bit io. The 256 byte of 8155 ram give you 128 storage cells for the cp1-instructions (like 04.056 which means load absolute 56 into accumulator).\
You could control electronics and fishertechnik with this little computer, even model trains. There was an io-interface (8 relays, 8 inputs), a cassette interface for loading and saving programs, an extension interface (another 8155 gives you +128 storage cells and 16 ios) and another io-interface with 8 leds and transistor drivers.