Re: Software for MS-DOS 1.25

From: Michał Pleban <*lists_at_michau.name*> Date: Mon, 09 Oct 2017 07:06:49 +0200 Message-ID: <59DB03E9.4010005@michau.name> · lists_at_michau.name

André Fachat wrote:

> You would of course have to manage memory around the mirror in main
> memory. But there is no physical bus conflict as proposed in the
> previous post.

Theoretically, it could work. The video memory at $Bxxxx would wrap into
main memory at $3xxxx. So if we told MS-DOS that it has 192 kB of RAM,
not 256, it would not touch this memory. Some applications that
calculate memory size themselves could be problematic but otherwise
sounds reasonable.

Regards,
Michau.

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