M20 Olivetti M20

Antonio Busi's M20 BC and ST

Antonio has an interesting collection of M20s and other Olivetti products. You can find them in his pages. Photos are reproduced here with his permission.

M20ST and M20BC Antonio's beautiful garden with an Olivetti M20ST on the left and an Olivetti M20BC on the right.

M20ST and M20BC Another view of the Olivetti M20ST on the left and an Olivetti M20BC on the right. On the bottom, the printer shown is a

M20BC The M20BC without the monitor.

Motherboard The big motherboard of the Olivetti M20. In this computer, are installed three memory expansions and the APB 8086 card.

Memory A closeup of the memory expansions which bring the total RAM memory of the Olivetti M20 up to 512kB.

APB 8086 The Olivetti Alternate Processor Board, which contained an 8086 processor, able to boot the MS-DOS. In this way the Olivetti M20 could be made compatible with the IBM PC.




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