Commodore PLUS 4 Service Manual page 3

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