14 Mar
1997
14 Mar
'97
5:25 a.m.
At 10:49 AM 3/14/97 -0500, Sean wrote:
I try to use the machines I have, and my big project
right now is to
implement my own OS for them. Most of my machines (with the exception of
three) are in good working condition. One needs a replacement harddrive
What's a harddrive??
I use my atari just about every day. Thanks to some of the emulators, I
still use a program that I wrote about 13 years ago. It's a program to list
out the important things I have to do each day. It's a really old
scheduler, but it's easy to use, and works like a charm.
If anyone knows or has an eprom burner or information about burning
cartridges on the atari, I would appreciate hearing from them. My dad has a
RomMax 4G Universal Eprom Programmer at work, and we cant seem to read the
eproms from any cartridge. I would like to figure this out, maybe there is
a proprietary scheme, but we can't seem to figure it out. I would also like
to acquire my own eprom burner, so anyone with a cheap no frills one for
sale, please let me know. Of course, it would help if it could read these
atari roms.
Thanks in advance.
Isaac Davis
idavis(a)comland.com
indavis(a)juno.com
14 Mar
14 Mar
7:54 p.m.
At 10:25 AM 3/14/97 -0600, you wrote:
If anyone knows or has an eprom burner or information
about burning
cartridges on the atari, I would appreciate hearing from them. My dad has a
RomMax 4G Universal Eprom Programmer at work, and we cant seem to read the
eproms from any cartridge. I would like to figure this out, maybe there is
a proprietary scheme, but we can't seem to figure it out.
Hmmm... have not looked at Atari ROMs since the days when I used to service
them, but they might have used a trick I first noticed on the Apple // ROMs.
One of the chip select lines is inverted from the norm, so if you put it in
a standard programmer it would always appear blank. As our programmers at
the time were not real bright, I built a test socket that we plugged into
the programmer and then plugged the ROM into the test socket.
The test socket had a 7406 ('04?, it's late) hex inverter and a set of
jumpers on it that allowed us to selectively invert any/all of the chip
select lines. Problem solved! And curiously enough, the inverted line
tended to be the program voltage line on the matching EPROM so if we needed
to install one in an Apple // as a replacement we just needed to remember
to fold that pin under.
Might be worth a look.
-jim
---
jimw(a)agora.rdrop.com
The Computer Garage - http://www.rdrop.com/~jimw
Computer Garage Fax - (503) 646-0174
15 Mar
15 Mar
2:37 a.m.
New subject: Atari carts
On Fri, 14 Mar 1997, Jim Willing wrote:
I know that this is done for the Atari 2600 carts, so I imagine it would
be done for the computer carts as well.
- Ron
If anyone knows
or has an eprom burner or information about burning
cartridges on the atari, I would appreciate hearing from them. My dad has a
One of the chip select lines is inverted from the norm, so if you put it in
a standard programmer it would always appear blank. As our programmers at
the time were not real bright, I built a test socket that we plugged into
the programmer and then plugged the ROM into the test socket.
9991
days inactive
9992
days old
2 comments
3 participants
participants (3)
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idavis＠comland.com -
jimw＠agora.rdrop.com -
rkneusel＠post.its.mcw.edu