Make your own free website on Tripod.com

Olivetti M386/25


Machine type XP 2670
Serial 0019969
Manufacturer Olivetti, made in Italy
Preloaded software MS-DOS 4.01 and Windows 3.0 or OS/2 1.2
Date February 1991

Physical description

Type Desktop (rev. of front panel 2/91)
Dimensions (HxWxD) 155 x 420 x 405 mm
Drive bays 4 x 3.5" (two may be converted into one 5.25" half-height), all accessible
Power supply 200-220VAC, 1A (dated 02/91)

Main board

Manufacturer Olivetti
BIOS Olivetti, vers. 1.08, Nov. 19, 1990
Chipset Olivetti
Processor Intel 80386DX-25 MHz (32-bit) PGA
Coprocessor Intel 80387DX-25 MHz, PGA ADDITION, socket for optional Weitek coprocessor (*)
External cache 32 Kb 25ns
Cache Controller Intel 82385-25
Memory 2 Mb, 80ns on board, plus 8 sockets for 80ns, 30-pin SIMMs (to be installed in groups of four)
Max memory 18 Mb (2 Mb on board + 16 x 1 Mb SIMMs, incl. memory card) (**)
Bus ISA 16-bit
Expansion slots 5 x 16-bit ISA (all available), slot for additional memory card (32-bit proprietary)
Interface FDD (2 units), IDE HDD (2 units)
Video Integrated Chips & Technologies VGA-plus adapter
Ports PS/2 keyboard, PS/2 mouse, serial (UART 16550A), parallel, VGA

Cards

Installed RAM 8 x 1 Mb SIMMs, four 80ns (9140), four 70ns (9302) (total mem. 10 Mb)
Controller Farp Host6P.02 IDE adapter (mid-92) ADDITION (***)

Storage

Diskette drive 1.44 Mb, 3.5" slim-size (Sony MFD-17W, 9009)
2nd Diskette drive 1.2 Mb, 5.25" half-size (Panasonic JU-475) ADDITION
Hard disk Conner CP30126 (120 Mb), IDE/ATA, 3.5" half-height (9151) REPLACEMENT (****)

Trivia

Acquisition Mar. 2001, paid a couple $
Condition Very good, working
Installed sw None
Repairs/modifications Added second diskette drive (replacing non-functioning tape streamer) and 4 x 1 Mb memory SIMMs (it had 6 Mb only)
Current status All hw working
Current O.S. Olivetti MS-DOS 5.00, MS Windows 3.0 (Italian)
Spare parts Parts and accessories from other Olivetti PCs (P750, P800)

Notes

(*) Two sockets for optional coprocessors are featured, allowing either an 80387 or a Weitek 3167 to be installed.

(**) An additional memory card, supporting 8 more 30-pin SIMMs, can be added. Despite many efforts, I was never able to use more than 15 Mb on this machine. If 16 Mb (16 x 1 Mb SIMMs) are installed, the last four SIMMs will not be"viewed" (BIOS reports 14 Mb instead of 18). Instead, a 12 x 1 Mb + 4 x 256 Kb combination (tot. 15 Mb) can be correctly configured.

(***) This additional controller is required to use the installed 120 Mb HDD unit as integrated IDE interface only supports twenty specific HD types, and no "user" type can be configured.

(****) Original HDD was either a 40 Mb, a 200 Mb or, most likely, a 100 Mb unit (the latter was the most common).


Peripherals: KEYBOARDS, MONITORS, MICES


Back to Systems Listing
Back to PCs Main Page
Back to Home page

This page was first published on the web on Nov. 11, 2001
Last revised May 25, 2004
051