PLUS 4 PRODUCT SPECIFICATION
MEMORY
64K RAM. 60K RAMUser accessible for BASIC programs.
ROM
32K ROM Standard (includes operating system andBASIC interpreter) with 32K additional ROM con-
taining the built-in productivity software.
MICROPROCESSOR
7501 Microprocessor -- .89 or 1.76 MHz clock.
DISPLAY
40 Columns x25 linesof text.
COLORS
128 Colors (16 colors; 8luminance levels).
CHARACTERS
Upper &lower case letters, numerals and symbols. Reverse andflashing charachters. All PET graphic
characters.
DISPLAY MODES
Text characters. High resolution graphics. Split screen text/high resolution graphics. Multicolor graphics.
RESOLUTION
320 x200 Pixels
SOUND
2Tone generators or 1Tone and 1 white noise generator.
VOLUME
8Volume levels
KEYBOARD
Full size typewriter style design
KEYS
67 Keys total. 4Cursor control keys. 4Programmed (reprogrammable) function keys (upto 8 user
defined functions possible). Color control keys. HELP key. Upper and lower case character set. Graphics
character set.
INPUTS/OUTPUTS
PLUS/4 MODEM (User) port. Serial port. ROM cartridge and parallel disk drive port. 2Joystick ports.
C1531 Cassette drive interface port. RF Output-channel 33 or 4. Video output-composite/
chrominance/luminance. Audio input/output. Power supply input.
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