Specification:

512 test pins.
Connector pins 8 64 way via standard IDC header.
Continuity less than 27K ohm
Keyboard 4 x 4 keyboard; 0 to 9, 4 cursor keys, clear & enter
Display 4 line 20 character alphanumeric LCD, backlit display
Processor Z180
Memory 1MByte RAM 59 cable memory store
RS232-1 Printer link
RS232-2 PC or Keyboard/display link
Power External 'Plug Top' power supply.
5 year Lithium (memory backup)
L 230mm W 120mm D 25-40mm (keyboard/display)
L 200mm W 430mm D 50mm.