Olivetti M24

Machine type XP 1050
Serial 0217668
Manufacturer Olivetti, made in Italy
Date March 1986

Physical description

Type Desktop
Dimensions (HxWxD) 160 x 380 x 415 mm
Drive bays 2 x 5.25" half-height, both accessible (see below for the external disk enclosure)
Power supply 200-220VAC, 1A

Main board

Manufacturer Olivetti (sticker 3/86)
BIOS Olivetti Resident Diagnostics Rev. 1.36 (June 19, 1985)
Processor Fujitsu MBL 8086-2 (8 Mhz, 16-bit), DIP (8548), 1 wait state
Coprocessor Socket for optional 8087 coprocessor
Memory 640 Kb 150ns DRAM DIPs (four banks, two 64 K x 9, two 256 K x 9) (chips 8604)
Max on system board 640 Kb
Bus 16-bit, proprietary (ISA 8-bit cards compatible)
Expansion slots 3 x 16-bit (proprietary), 4 x 8-bit ISA, all available
Interface FDD (supports two 360/720 Kb units)
Video Integrated display adapter (640 x 400 mono) (sticker 3/86) (*)
Ports Serial for keyboard/mouse (propr. type), serial (UART 8250), parallel, video (proprietary)


Controller WD 1002A (ISA 8-bit), supports two HDD (dated 8813) see below for the external disk enclosure ADDITION
Tape Controller QIC-02 (ISA 8-bit) see below for the external disk enclosure ADDITION


Diskette drive 360 Kb, 5.25" half-height (Panasonic JU455)
2nd Diskette drive 360 Kb, 5.25" half-height (Panasonic JU455)

External Disk Enclosure ADDITION

Model/Type: Asem Megabox
Made in Italy
Internal 90W Power Supply
Features two
5.25" half-height drive bays, both accessible, containing the following units:

Hard Disk drive Nec D 5146H (20 Mb), 5.25" half-height (date 1988-06)
Tape drive Teac DX983C


Acquisition March 2002, gift
Condition Very good, working
Installed O.S. Olivetti P.C. DOS 3.30 (Italian)
Current status All hw working (tape drive has not been tested)
Spare parts Enough to build another M24, nothing for the ext. enclosure


(*) 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 May 18, 2002
Last revised May 24, 2004