Memotech Limited MTX 500, Service Manual

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4
NODE/RING SYSTEM
Communications software and interfacing enabling
construction of MTX Ring Systems. The system is
interrupt driven and runs in conjunction with the
twin RS232 Communications Board.
Compatibility of the memory boards and Communications
Board is given below.
Compatibility table of internal expansion boards
RAM BOARDS
32k 64k 128k 256k Comms Board
32k * * * *
64k * * * * *
128k * * * * *
256k * * * * *
Comms * * * *
Board
ROM Expansions
Via the cartridge port or disc drive bus these provide:
MTX PASCAL
NODE SYSTEM software
Business, Education and Games software
Suitable Printers
Centronics-type parallel printers
RS232 serial printers (requires Communications
Board)
Power Supply Unit
Input: 220/240 VAC 50/60 Hz. or 110/115 VAC 50/60
Hz.
Output: 22.5 VAC, 1A tapped at 18V and 9V.
Dimensions in millimetres: Width 92 Depth 110
Height 70 Weight: 1.0 kilogram
The PSU is double insulated and has a side mounted
rocker switch which is internally illuminated when
the unit is on. The mains transformer is located
between two groups of four anti-vibration noise
absorbing rubber mount. Extensive strain relief
MTX Service Manual