Olivetti M24

Machine type XP 1050
Serial (Unreadable)
Manufacturer Olivetti, made in Italy
Date February 1985

Physical description

Type Desktop
Dimensions (HxWxD) 160 x 380 x 415 mm
Drive bays 2 x 5.25" half-height, both accessible (a "sidecar" disk tray may be added internally, supporting one 5.25" half-height HDD)
Power supply 200-220VAC, 1A

Main board

Manufacturer Olivetti (51/84 on printed circuitry, 2/85 on sticker)
BIOS Olivetti
Processor AMD D 8086-2 (8 MHz, 16-bit), DIP (8443), 1 wait state
Coprocessor Socket for optional 8087 coprocessor
Memory 256 Kb 150ns DRAM DIPs (four banks, each 64 K x 9)
Max on system board 256 Kb (*)
Bus 16-bit, proprietary (IBM PC's 8-bit cards may be used)
Expansion slots 2 x 16-bit (proprietary), 1 x 8-bit ISA, all available (may be replaced w. a 3 + 4 slots type)
Interface FDD (supports two 360/720 Kb units)
Video Integrated video adapter (640 x 400 mono) (84-39 on card) (**)
Ports Serial for keyboard/mouse (propr. type), serial (UART 8250), parallel, video (proprietary)


Diskette drive 360 Kb, 5.25" half-height (Panasonic JU-455)
2nd Diskette drive 360 Kb, 5.25" half-height (Panasonic JU-455)


Acquisition Summer '01, paid a few dollars together w. and some other appliances (incl. M24 parts and systems)
Condition Good, working
Current status All hw working, some scratches on top cover
Spare parts Enough to build another M24


(*) All chips are soldered (the system would accept 640 Kb on motherboard).

(**) Connects motherboard to riser ("bus") card. Can be replaced w. EGC adapter. Video connector also supplies DC Power to monitor.


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This page was first published on the web on Nov. 11, 2001
Last revised May 24, 2004