Appendix A: MacCharlie Specifications

Processor:

Intel 8088, 16-bit architecture, 4.77 MHz clock frequency

Memory:

MacCharlie:	256 K bytes RAM 16 K bytes ROM
MacCharlie Plus:	640 K bytes RAM 16 K bytes ROM

Diskette Capacity:

360 K bytes per formatted, 5 1/4 inch diameter soft sector diskette

Screen:

Uses the Macintosh 9-inch diagonal, high resolution screen. The IBM PC compatible screen is represented by the MacCharlie window.

MacCharlie Window:

Can be sized by the operator. At full extension, contains 25 lines by 80 columns of text characters.

Interfaces:

Synchronous serial keyboard bus. Two RS422 serial ports, 230.4 K baud maximum. One RS232 serial port, 19.2 K baud maximum.

Input:

Set during final assembly to:

Line voltage: 90 to 135 volts AC, RMS
Frequency: 47-63 Hz
Power: 60 watts

Switchable for foreign usage to:

Line voltage:180 to 270 volts AC, RMS
Frequency: 47-63 Hz
Power: 60 watts

Keyboard:

10-key function keypad. 18-key numeric keypad. Also uses the Macintosh 58-key, 2-key rollover, software mapped keyboard.

Size:

	Height	Width	Depth
System Unit	351 mm 13.8 in	373 mm 14.7 in	275 mm 10.8 in
Keyboard	51 mm 2.0 in	503 mm 19.8 in	178 mm 7.0 in

Environment:

Temperature:	Operating: Storing:	10to40° C 50 to 104° F -40 to 50° C -40 to 122° F
Humidity:	All conditions:	5 % to 90 % relative humidity
Altitude:	0 to 4615 meters 0 to 15,000 feet

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