NAME  

CBM 256-80

MANUFACTURER  

Commodore

TYPE  

Professional Computer

ORIGIN  

U.S.A.

YEAR  

1983

BUILT IN LANGUAGE 

Commodore Basic 4.0

KEYBOARD  

Full size 102 key QWERTY keyboard with separated numeric keypad

CPU  

MOS 6509 (some models came with optional 8088 or Z-80)

SPEED  

2 MHz

COPROCESSOR  

SID (sound) & VIC-II (video)

RAM  

256 KB (expandable to 704 KB)

VRAM  

16 KB

ROM  

24 KB

TEXT MODES 

80 x 25

GRAPHIC MODES 

None

COLORS  

Monochrome

SOUND  

3 voices, synthesizer, digital sound capable

I/O PORTS 

IEE-488, CBM Dataset port, RS232, CBM-II/PET-II expansion port, RCA Audio

BUILT IN MEDIA 

C128D: 1571 disk-drive

OS  

Rom based CP-M or MS-DOS

POWER SUPPLY 

Built-in switching power supply

PERIPHERALS  

2 x 170 KB or 500 KB or 1 MB 5'' floppy disc unit, 8088 or Z80 card

SIZE / WEIGHT

46 (W) x 59.5 (D) x 46 (H) cm

PRICE  

$2995

 

CBM-256

Commodore CBM-256

 The CBM 256-80 truly represents the top of the CBM-II line. The stylishly curved plastic case with detachable keyboard and built in monitor are a contrast to the rest of the CBM-II models, giving it the "High Profile" distinction. The CBM 256-80 HP is the big brother to the CBM 128-80 HP and was known as the CBM 720 in Europe. Like the other CBM-II models, the 256-80 has a full-sized QWERTY keyboard, 80-column display, Commodore BASIC 4.0, RS232-C and IEEE-488 ports,


and the ability to attach an optional 8088 or Z-80 coprocessor board. The CBM 256-80 HP has an ample 256K of banked memory, and the particular model in this collection was also lucky enough to include the 8088 coprocessor board for running MS-DOS programs. MS-DOS compatibly was considered an important feature at the time, as IBM was just beginning to envelope the business computing world. The CBM-II High profile machines, which include the CBM 128-80, 256-80, 710, and 720, could all be purchased with built-in disk drives. These drives are said to be 8050 compatible mechanisms.


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