The CBM 500 had a 40-column, 300 x 200 pixels display. Contrary to the 600 and 700 it also had two ports for joystick, light pen and paddles.
The CBM 600 was the same as the 500 but had a 80-column display and 256 Kb RAM.
MicroSoft Basic was in ROM. Both models had an option for a second processor (8088 or Z80) to function alongside the standard 6509, the 6509 was then used for I/O, display and keyboard management. They worked under Commodore DOS or CP/M and MSDOS when the computers used the other processors.
The 500 / 600 series was mainly sold in Europe, but a few models are known to have been sold in the United States.
The model pictured here is a 610.
CBM 500 / 600 Series
BUILT IN LANGUAGE
Full stroke 94 key with numeric keypad and function keys
MOS 6509 (Zilog Z80 & Intel 8088 optional)
1 MHz (500), 2 MHz (600)
128 KB (up to 896 KB, varying according to the model)
40 x 25 (500), 80 x 25 (600-700)
300 x 200 (500), 512 x 512 (600-700)
16 (500), Monochrome (600-700)
3 voices, 9 octaves (700)
SIZE / WEIGHT
46 (W) x 59.5 (D) x 46 (H) cm
IEEE-488, Serial RS-232
BUILT IN MEDIA
Change according to the model
ROM Based (CP/M or MS DOS optional)
Built-in power supply unit
2 x 170 KB or 500 KB or 1 MB 5'' floppy disc unit, 8088 or Z80 card