Thanks to Josh Dersch I now have a good copy of the ROM for the Altos 8500
boards. I’ve put it up online here:
http://retrobattlestations.com/Altos/Altos-8000-8500.rom
I burned it and popped it in but my Altos still doesn’t come up. Nothing is
output on console 1. I’ll have to start walking
On Mon, Jun 15, 2015 at 1:52 PM, Chris Osborn fozzt...@fozztexx.com wrote:
Found a single 2716 EPROM on the Altos and pulled it out and read it in
with my MiniPro TL866CS and it comes back as entirely 00. Since that seemed
pretty odd I grabbed another 2716 out of an old Nintendo board and it
The NatSemi MM2716Q is definitely the ‘normal’ single rail EPROM. The TMS2716
is the TI version that is 3-rail. A quick test would be to measure pin 19 in
circuit. If this is 12v, then it’s expecting a TI part.
Does your reader have any other ‘brands’ of 2716 you could try? What about
On Jun 15, 2015, at 2:36 PM, Ian McLaughlin wrote:
Does your reader have any other ‘brands’ of 2716 you could try? What about
trying to read it as a 2732? Looking at the pinouts it looks like the only
difference is pin 21 which is Vpp (programming voltage) on a 2716 and A11 on
a 2732.
Found a single 2716 EPROM on the Altos and pulled it out and read it in with my
MiniPro TL866CS and it comes back as entirely 00. Since that seemed pretty odd
I grabbed another 2716 out of an old Nintendo board and it reads fine, so I'm
pretty sure the TL866CS can read 2716.
I have a feeling
All zeroes is really strange - a blank EPROM is all ones, so it’s not that it
got exposed to UV light.
Ian
On Jun 15, 2015, at 1:52 PM, Chris Osborn fozzt...@fozztexx.com wrote:
Found a single 2716 EPROM on the Altos and pulled it out and read it in with
my MiniPro TL866CS and it comes
On Jun 15, 2015, at 1:56 PM, Ian McLaughlin i...@platinum.net wrote:
All zeroes is really strange - a blank EPROM is all ones, so it’s not that it
got exposed to UV light.
It definitely does seem strange. I wonder if maybe it’s a TI style 2716? It’s a
National Semiconductor MM2716Q.
--
On Jun 15, 2015, at 2:01 PM, Josh Dersch dersc...@gmail.com wrote:
I have an ACS 8000-10 at home (which I believe is the same machine with a
smaller hard drive), let me see if I can read the EPROM out of it tonight…
It actually might be essentially the same machine. From what I can tell the
...@fozztexx.com wrote:
Last week while bored and browsing eBay looking at things that are ending
soon something I had never heard of caught my eye: an Altos ACS 8000-15A. I
looked at the pictures and googled the brand and model and it didn’t seem to
be a very common computer and there were no bids
On Sun, Jun 14, 2015 at 3:47 PM, Chris Osborn fozzt...@fozztexx.com wrote:
,,, Altos ACS 8000-15A... nothing spits out on the Console 1 RS232 port. From
what I understand the serial ports are wired DTE (which seems odd since you
use it with terminals) and so I’m using a null modem adapter
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