Re: [Freedos-user] Installing for 8086 CPU on SD Card.

[Liam P. <lp...@gm...>]

On Wed, 7 Aug 2024 at 05:30, Trevor Campbell via Freedos-user
<fre...@li...> wrote:
>
> I am trying to resurrect an old Amstrad PC-1512, which is an 8086
> machine with 640K mem.

Brave man!

FWIW, possibly the optimal DOS for that machine would be DR-DOS 3.41.

It's as small as MS-DOS 3.3. All later DOSes (MS or IBM PC DOS 4, 5,
6, FreeDOS, etc.) take more base memory and rely on tricks with
high/upper memory on 2386 and 386 chips to sideline most of it.

DR-DOS 3.4 does >32MB disks and has command editing and things, but
it's tiny and is the smallest but richest DOS for an 8088/8086 PC.

Only the upgraded PC-1512 (and the later PC-1640)  had 640kB of
course. Stock models had 512kB, thus the number in the model name.
Which makes this even more important.

There's a tenuous historical justification: the PC-1512 shipped with
DR DOS-Plus in the box, which is an ancestor of DR-DOS.

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