!! Preliminary !!
CPU: 80C88 (4.77 MHz)
ROM: 16K bytes
RAM: User RAM: 256K bytes, 512K bytes depending on con-
Video RAM: 16K bytes
CLOCK: Battery-backed clock/calender
Minifloppy Two 3.5"disk drives.
disk drive: Diskettes used:
double sided, double density, 135 t.p.i.
No. of heads: 2
No. of cylinders (tracks): 80
Data transfer rate: 250K bits/sec.
Power supply to 5 V DC (from Power Unit)
Central Unit: 5 V DC (from battery)
System power max. 20 W
Display: 1:2.4 aspect ratio
Liquid crystal display (LCD)
25 lines of 80 characters
25 lines of 40 characters (by selection)
640 x 200 pixels
320 x 200 pixels
Keyboard: 78 keys, including:
10 Function keys
Numeric keypad (integrated into alphanumeric area)
LEDs indicating numeric keypad and upper case mode
Battery: Ni-Cd-Battery set, 5 V
500 charge/recharge cycles
6 hours operation with 10 % use of the disk drives
8 hours recharging time
Interfaces: Parallel (Centronics)
Serial (RS 232C)
Interface for the optional 5.25"disk drive
Ambient Temperature range: from 5 to 35º C (41 to 95º F).
Relative Humidity: from 20 to 80 per cent, non condensing.
Altitude (max.): operating 3000 m. (10,000 feet),
non-operating 10,000 m. (33,000 feet)
Dimensions/ 385 x 276 x 72 mm.
Weight: (15.15 x 10.8 x 2.83 inches)
5,700 Kg (12.5 Ibs).
AC Adapter: Input: AC (voltage, frequency according to the label on the
Output: 5 V DC for battery charging,
5 V DC to system
AC supply current variations tolerated:
Voltage +/-10 per cent
Frequency +/-1 per cent
32/E Installation and Operations Guide
|Both the DC and Charge connector
are barrel type. Pin is plus, barrel is minus. DC is 5 Volt, Charge is
some current limited 12 Volt source.
The 5 Volt power supply is internally converted to +/- 12 Volt, probably for the RS232C port only. The conversion takes place at the shielded conversion board at the top left, connected to the yellow and orange wires.
|A topview of the back of the
M15. Top left and right are floppy drives. The seven white-wire
connector is CN10, the power connector. The white wires come from the
shielded conversion board.
The power connectior is CN10. The pinout is:
1. + 5 Volt
|The power supply warns for wrong
connection. IMHO with the wrong connection sequence, the computer won't
start up at all. I don't know about batttery charging, as I haven't got
|The keyboard uses a 6-pole RJ-11
phone connector. Wire color from left to right; black (GND), yellow,
green (sig), red (sig), black, blue (+5V). Data and clock are on green
and red. Make sure you test this with a PC (XT) keyboard as AT keyboards
are not compatible.
Back to index
Last update: 2003-11-27