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jiffy dos
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Jim Brain JiffyDOS License
*************************************
From: Jim Brain
Sent: 12 November 2009 04:25
Subject: JiffyDOS Forensics
Please feel free to repost on other
forums, I'm trying to catch as many
people as possible:
As many of you are probably aware, I
acquired a license to sell JiffyDOS
earlier this year and am now ramping
up sales.
To that end, I am trying to
reconstruct the exact product
offerings that CMD offered. This
means verifying images, and
determining what original ROM images
CMD supplied with each overlay.
Thus, if anyone can use a DOS ROM
reading utility (or EPROM reader) and
can send me a copy of the both halves
of the JDOS ROM, I'm still struggling
with the following systems.
1571: I have three versions here, but
cannot determine which is correct.
The MD5s are:
41c6cc528e9515ffd0ed9b180f8467c0,
6b4d46b28b7414d5a82cea4972894600, and
d649fa6b0108c20ce213f5496d5980a5.
What is the version number on the ROM
sticker?)
1571D: I have a 1571D JiffyDOS ROM
here, but it looks to be a 1571DCR
(the cost reduced version). Notes
indicate a non-CR 1571D used a normal
1571 JD ROM overlay, but I'd like to
verify that.
MSD SD1/SD2: I am trying to
determine the version of MSD code in
the lower half of the U5 JiffyDOS for
SD2. The MD5 is
1a2efac3b96decf83fba27bc17c5a8a7. I
checked against my SD2-2.3 version
here, but they are different. Also,
is the SD1 JiffyDOS the same as SD2
version?
Indus GT: I do not have an original
JDOS for this, so I need a dump to
compare.
1541C: Again, I do not own an
original JDOS for this machine.
I understand there is a Swedish
version of JiffyDOS for the C128 and
C128D (and possibly for the C64)
[Update: I have been sent copies of
the Swedish JiffyDOS ROMs, but I'd
still be interested in what version
of KERNAL was included as the
"original" KERNAL for these units.]
German/Finnish JiffyDOS variants?
Any help folks can provide would be
much appreciated. In fact, if you
have an original JDOS, no matter the
type and can dump it for me (both the
original and the JD portions), that'd
be great. Anything you can tell me
about the setup - sticker legend
(version number, etc.), machine
variant (128, 128D, 128DCR, etc.),
video standard (PAL/NTSC), and
whether it had a switch on the ROM -
is good information to share.
To clarify, I know there are bootleg
archives available, but I can't
consider them authoritative. In
addition, the archives would not tell
me what CMD placed in the non-JD half
of the EPROM on units with switches.
I would prefer to check against
genuine copies of the overlays if at
all possible.
Jim!
Home: http://www.jbrain.com
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