Groups > it.comp.retrocomputing > #53460

Re: Olivetti M6 420 Suprema

From	mdkcom <info@mdkcom.net>
Newsgroups	it.comp.retrocomputing
Subject	Re: Olivetti M6 420 Suprema
Date	2021-04-05 23:53 +0200
Organization	Aioe.org NNTP Server
Message-ID	<s4g0si$1kuo$1@gioia.aioe.org> (permalink)
References	(5 earlier) <s47osn$1o57$1@gioia.aioe.org> <s4b0hh$lvd$1@gioia.aioe.org> <s4c2t7$1sk6$1@gioia.aioe.org> <s4d0vb$uqu$1@gioia.aioe.org> <s4fu4d$fna$1@gioia.aioe.org>

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Il 05/04/21 23:06, EngiNerd ha scritto:
> Nelle prossime settimane farò qualche altro test per cercare di superare 
> i problemi incontrati, ma realisticamente credo che l'unica macchina 
> pubblicabile sia il PCS 286 Headland.

Uhmm, probabilmente sarai già al corrente di queste informazioni, 
condivido comunque qui alcune considerazioni che uscirono in un passato 
scambio di mail:

VGA BIOS are 24 kB at 0xE0000 and system BIOS are 64 kB of course at 
0xF0000, I think both are concatenated with 40 kB of zero bytes between 
VGA and system BIOS, that gives a 128kB file with correct checksum.
I guess those 40kB may be available for DOS when using BIOS shadowing 
but are probably filled with zeros on ROM chips.
PCS286 and PCS286-S have all 128kB used in a such way, but VGA BIOS 
isn't 100% IBM compatible at BIOS level, it's missing "IBM" at offset 
0x30 and it isn't even formatted as a BIOS extension ROM, on both 286 
systems VGA BIOS and system BIOS code is mixed along those 128kB and 
nothing is free for use under DOS over 0xE0000

Saluti e a presto,
MuRdOcK

Thread

Olivetti M6 420 Suprema mdkcom <info@mdkcom.net> - 2021-03-07 17:01 +0100
  Re: Olivetti M6 420 Suprema EngiNerd <webmaster_dot_crrc@yahoo.it> - 2021-03-08 13:53 +0100
    Re: Olivetti M6 420 Suprema mdkcom <info@mdkcom.net> - 2021-03-08 16:18 +0100
      Re: Olivetti M6 420 Suprema EngiNerd <webmaster_dot_crrc@yahoo.it> - 2021-03-09 21:18 +0100
        Re: Olivetti M6 420 Suprema mdkcom <info@mdkcom.net> - 2021-03-17 15:18 +0100
          Re: Olivetti M6 420 Suprema EngiNerd <webmaster_dot_crrc@yahoo.it> - 2021-03-18 21:18 +0100
          Re: Olivetti M6 420 Suprema EngiNerd <webmaster_dot_crrc@yahoo.it> - 2021-04-02 20:47 +0200
            Re: Olivetti M6 420 Suprema mdkcom <info@mdkcom.net> - 2021-04-02 21:53 +0200
            Re: Olivetti M6 420 Suprema mdkcom <info@mdkcom.net> - 2021-04-04 02:16 +0200
              Re: Olivetti M6 420 Suprema EngiNerd <webmaster_dot_crrc@yahoo.it> - 2021-04-04 12:03 +0200
                Re: Olivetti M6 420 Suprema mdkcom <info@mdkcom.net> - 2021-04-04 15:21 +0200
                Re: Olivetti M6 420 Suprema EngiNerd <webmaster_dot_crrc@yahoo.it> - 2021-04-05 22:41 +0200
                Re: Olivetti M6 420 Suprema mdkcom <info@mdkcom.net> - 2021-04-06 00:08 +0200
                Re: Olivetti M6 420 Suprema EngiNerd <webmaster_dot_crrc@yahoo.it> - 2021-04-11 15:04 +0200
                Re: Olivetti M6 420 Suprema mdkcom <info@mdkcom.net> - 2021-04-11 17:42 +0200
                Re: Olivetti M6 420 Suprema mdkcom <info@mdkcom.net> - 2021-04-22 23:40 +0200
                Re: Olivetti M6 420 Suprema EngiNerd <webmaster_dot_crrc@yahoo.it> - 2021-04-25 10:39 +0200
                Re: Olivetti M6 420 Suprema mdkcom <info@mdkcom.net> - 2021-04-25 18:35 +0200
                Re: Olivetti M6 420 Suprema mdkcom <info@mdkcom.net> - 2021-04-04 20:36 +0200
                Re: Olivetti M6 420 Suprema EngiNerd <webmaster_dot_crrc@yahoo.it> - 2021-04-05 23:06 +0200
                Re: Olivetti M6 420 Suprema mdkcom <info@mdkcom.net> - 2021-04-05 23:53 +0200
                Re: Olivetti M6 420 Suprema EngiNerd <webmaster_dot_crrc@yahoo.it> - 2021-04-11 15:02 +0200
    Re: Olivetti M6 420 Suprema mdkcom <info@mdkcom.net> - 2021-03-12 16:54 +0100

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