website/content/museum/kosmos-cp1-computer-praxis.md

title, categories, types, origins, years, cpus, params

title	categories	types	origins	years	cpus	params
KOSMOS CP1 / Computer Praxis	Computers	Home Computer	Germany	1980	8049	name image company company_name specs forum_thread oc_id source CP1 / Computer Praxis /media/museum/photos/kosmos_z80-training-kit_1.jpg /companies/kosmos KOSMOS label value NAME CP1 / Computer Praxis label value MANUFACTURER Kosmos label value TYPE Home Computer label value ORIGIN Germany label value YEAR ? 1980 label value BUILT IN LANGUAGE Machine code label value KEYBOARD Membrane keyboard, 57 keys label value CPU 8049 (8-bit) label value SPEED 6 Mhz label value CO-PROCESSOR 8155 (I/O) label value RAM 256 bytes label value ROM Unknown label value TEXT MODES Small LED display label value GRAPHIC MODES None label value COLORS None label value SOUND None label value POWER SUPPLY External PSU, 8-14v 488 494 url date https://web.archive.org/web/20221203195223/http://www.old-computers.com/museum/computer.asp?c=494 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.