[aprssig] Can you make this out?
dave at emv.co.uk
Tue Jan 17 03:17:22 CST 2006
You can put the image of a 27x256 in the top half of a '512 and in most
hardware it will run OK just like that.
If all else fails, make two images, in top and bottom half's of the '512
and it's 99.9% certain to run! No hardware changes needed on the host
board for that, unless you *need* to address more than 32k of ROM.
Even then, it's often no more than one knife cut and a bit of Kynar wire
to run for the extra address line, so long as A15 is actually available
for use of course!
> -----Original Message-----
> From: Ron Stordahl [mailto:ron.stordahl at digikey.com]
> Subject: Re: [aprssig] Can you make this out?
> Yes, he is running TheNetX1J4 firmware, which requires a
> 27C512. Since it is a 1270B, he has made some slight mods to
> allow it to run with a
> 27C512 rather than the usual 27C256. It would not be hard to
> get it back to shape to run UIDIGI with a 27C256 which you
> would have to burn.
> See http://groups.yahoo.com/group/uidigi/
> Ron, N5IN
> Fred Atkinson wrote:
> > I'm talking with a fellow who has a TNC he's willing
> to part with. He tells me that it is an MFJ-1270B. I asked
> him what version of firmware is in it. He emailed me the
> contents of the login screen. It is as follows:
> > TheNet X-1J4 VK2AMW-6
> > By DF2AU/DC4OX/G8KBB
> > Can you make any sense out of this and tell me if this
> firmware is suitable for our pending APRS digipeater?
> > Regards,
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