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Re: Olivetti M20 emulation status? [Re: rfka01] #100131 06/10/15 09:11 PM
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NCR DMV- DEC Rainbow- Siemens PCD- ITT 3030-Oly People- Acorn A5000- Olivetti M20
Re: Olivetti M20 emulation status? [Re: rfka01] #100146 06/11/15 09:16 PM
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All of the PCOS dumps, except the M24 one which is the only teledisk image, have an empty first track (probably because it is FM and thus not readable in the large majority of PC's). The M24 image is the only one that works properly in PCOS 3+ so we'll likely either have to get the first sector from each original disk or try to copy the first sector from the M24 image to the others. FWIW, here's the contents (the other sectors are empty):


Last edited by crazyc; 06/11/15 09:19 PM.
Re: Olivetti M20 emulation status? [Re: rfka01] #100147 06/11/15 09:48 PM
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rfka01 Offline OP
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Here's what the M20 experts say: :)))

http://www.z80ne.com/m20/index.php?argument=sections/transfer/imagereadwrite/imagereadwrite.inc

I'll be away over the weekend, but I might try out my kryoflux next week - I'll format a disk on the M20 and then dump it via the kf ... given enough time smile

Until then your strategy of doctoring the existing images might just work smile


NCR DMV- DEC Rainbow- Siemens PCD- ITT 3030-Oly People- Acorn A5000- Olivetti M20
Re: Olivetti M20 emulation status? [Re: rfka01] #100148 06/11/15 10:50 PM
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It does work, just tried it. Doesn't help with the newer bios boot problem though.

Re: Olivetti M20 emulation status? [Re: rfka01] #100154 06/12/15 08:26 PM
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rfka01 Offline OP
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Maybe the newer BIOS revisions expect a different mainboard - according to this discussion there appear to be at least two different ones



https://groups.google.com/forum/#!msg/it.comp.retrocomputing/qK7igS02kYg/PCqkWmkb5CUJ



It links to this site which has pictures of the different mainboards

http://compvter.blogspot.de/2012/02/meglio-quattro-m20-che-un-m24.html

Last edited by rfka01; 06/12/15 08:27 PM.

NCR DMV- DEC Rainbow- Siemens PCD- ITT 3030-Oly People- Acorn A5000- Olivetti M20
Re: Olivetti M20 emulation status? [Re: rfka01] #100384 07/01/15 09:58 PM
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Another non-PC MSDOS machine down. That was fairly simple, it's a lot easier when you don't have to worry about possible CPU bugs. The screen can be cleared when it's in DOS, the vram probably has multiple pages but the docs aren't clear about it.

Re: Olivetti M20 emulation status? [Re: rfka01] #100385 07/01/15 10:11 PM
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Nice!

Re: Olivetti M20 emulation status? [Re: rfka01] #100392 07/02/15 05:42 PM
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rfka01 Offline OP
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Neat! And thanks a lot once again, adding the APB and elegantly fixing the newer BIOSs booting in one swell foop!


NCR DMV- DEC Rainbow- Siemens PCD- ITT 3030-Oly People- Acorn A5000- Olivetti M20
Re: Olivetti M20 emulation status? [Re: rfka01] #100421 07/05/15 05:10 PM
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Oliword and multiplan work now. Experience the pain of secretaries in 1982.

Re: Olivetti M20 emulation status? [Re: rfka01] #101838 10/01/15 02:42 PM
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Is the com: port supported?

I'd like to connect to the other end of the serial connection with something like "telnet localhost port".

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