Personal Communicator (PC85) (Premium Series)


1.1. Technical spec - standard.

REL : 1985

CPU : Z80 3.375MHz clock rate
RAM : 32k CMOS static RAM.
ROM :  
Main Board Revisions:
Core Board Revisions:
VDU : 
VIDEO : Monochrome standard 1 volt peak to peak
	composite video with negative sync.
COLOUR : R.G.B. intensity with positive 
	 or negative sync.
KEYBOARD :  
CASSETTE : Built-in to load and dump programs 
	   at 300 and 1200 baud.
SERIAL : RS232. Can be used to connect modems, 
	 printers and to network with other computers.
PARALLEL : 8 bit I/O fully programmable with 
	   strobe pulse for centronic printers. Connection 
	   for Star Network.
SOUND : Internal speaker with volume control 
	for BELL under CP/M.
REAL TIME CLOCK : Using the Motorola RTC 146818. 
	          Battery backed with a nicad battery.
DISK CONTROLLER : TMS2793NL Texas Instruments.
POWER SUPPLY : 10 to 12 volts at 1.5 amps. 
	       Standby current approx 700mA to 800mA. 
	       Peak current during a single 
		disk access 1200mA.
POWER SUPPLY UNITS : For monochrome use, use the 
	             Microbee M15 monitor with the internal 
	             power supply. For Colour use, use the 
		     Microbee plug pack number 111-012 
		     (10V, 1.5 amps).
OPERATING TEMPERATURE : 5-45 degrees C.
OPERATING HUMIDITY : 20%-80% relative humidity.

1.2. Technical spec - options.