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From: "Kerr-Mudd, John" <admin@127.0.0.1>
Newsgroups: alt.lang.asm,comp.os.msdos.programmer
Subject: Re: undump tool (was: Re: Base85 for DOS
Date: Wed, 28 Aug 2024 09:22:02 +0100
Organization: Dis
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On Wed, 28 Aug 2024 08:53:42 +0100
"Kerr-Mudd, John" <admin@127.0.0.1> wrote:

> On Wed, 28 Aug 2024 09:17:20 +0700
> JJ <jj4public@outlook.com> wrote:
> 
> > On Tue, 27 Aug 2024 08:12:15 +0100, Kerr-Mudd, John wrote:
> > > Last chance: could it be that in your environment ds<>es? - here's the same
> > > code with a push pop at the start & a few more exits if run out of text..
> > 
> > No. It wouldn't be a DOS compatible system if DS!=ES at COM program startup.
> > So, same result in Windows XP. And I did tested it.

Well something was different - ah well, we got there.
> > 
> > > 1E07B43F B5FDBAC3 01CD2191 E3F989D7 89D65781 3D2D6474 06B03EF2 AEE354B0
> > > 0AF2AEE3 26B020F2 AEE3208A 05473C30 7226244F D43788C2 8A054724 4FD43788
> > > D4D51088 04464974 0FE2E05A 89F129D1 43B440CD 214BEBAA 3C2075ED 380574BF
> > > EBE74E6F 74206120 64626720 66696C65 0D0A245A BA6201B4 09CD21C3
> > 
> > This one works
> 
> Phew! 
> 
> 
> > but still require the `->` custom marker, which I don't want,
> > because it won't work for standard DEBUG dump from anyone.
> 
> 
> Oh dear. I felt sure I'd catered for that. 
> So I just tested, yup, it's OK here.
> 
> 
The prog tests the first 2 chars of the input for '-d',
if so it is deemed to be a DOS DEBUG file, if not a scan for '>' is
performed to "check" for a GRDB one. if neither it puts out an error
message. 
It is then assumed that the remaining lines of input are of
format:

[prelude][space] [set of hex pairs] [double space] [other stuff to eol]

where:
[prelude] is typically segaddr:offset but must have no embedded
spaces.
 
[set of hex pairs] is e.g. [01 02 03 04-AB CD ..] with either space or '-'
between the pairs (anything <'0' actually).

[other stuff to eol] *can* contain spaces, the prog just skips
until LF seen

{-q should get ignored}

Given that you have a H2B prog and 'debug' you can see for yourself the
simplicity of the code.

-- 
Bah, and indeed Humbug.