26 Dec
2010
26 Dec
'10
12:52 p.m.
Is there anyone out there that can BURN a 2708 EPROM for me.
My Data I/O System-19 W/UNIPAK is DAS Kaput. It will not burn me a good
prom. Not Sure why though. My Fault ????
I am trying to add some code to Dave Dunfields Monitor to find out why
the 2708 that Andrew burnt is malfunctioning on my N*.
I have tried to add several lines of code but the resulting Prom just
doesn't perform the way the Andrew Prom does.
I am using a SOL-20 System/Bus Probe that will Single Step the N* CPU so
I can then track the code and its execution.
I can see the results of the OUT 3 & 2 Instructions but not the IN 2.
I am going to add jumpers to the Probe to display "Data In" as well as
the existing "Data Out" and that might help.
I have at least 5 2708's and can mail one out then I can sent the Code
as an attachment.
ALSO is there anyone out there using Dave's Monitor Mapped at "0000"
that would be willing to test the 2708 that I have; that works somewhat;
that way I could determine if the Fault is in the N* or in the Code itself.
Since I can't burn a New Prom I am up the creek without a Paddle so to
speak.
TIA
Bob in Wisconsin
26 Dec
26 Dec
6:38 p.m.
From: trebor77 at execpc.com
Is there anyone out there that can BURN a 2708 EPROM for me.
My Data I/O System-19 W/UNIPAK is DAS Kaput. It will not burn me a good
prom. Not Sure why though. My Fault ????
I am trying to add some code to Dave Dunfields Monitor to find out why
the 2708 that Andrew burnt is malfunctioning on my N*.
I have tried to add several lines of code but the resulting Prom just
doesn't perform the way the Andrew Prom does.
I am using a SOL-20 System/Bus Probe that will Single Step the N* CPU so
I can then track the code and its execution.
I can see the results of the OUT 3 & 2 Instructions but not the IN 2.
I am going to add jumpers to the Probe to display "Data In" as well as
the existing "Data Out" and that might help.
I have at least 5 2708's and can mail one out then I can sent the Code
as an attachment.
ALSO is there anyone out there using Dave's Monitor Mapped at "0000"
that would be willing to test the 2708 that I have; that works somewhat;
that way I could determine if the Fault is in the N* or in the Code itself.
Since I can't burn a New Prom I am up the creek without a Paddle so to
speak.
TIA
Bob in Wisconsin
Hi Bob from W
I have both a 19 and one of those s100 ROM programmer boards ( forget
the name ). The problem is that it is all in storage right now and it might
take a month to get to it ( moved into a new house and have other
projects for a while ).
Dwight
29 Dec
29 Dec
3:51 p.m.
I still want to get the N* with Monitor working. I was able to get my
BYT-8 working with the N* CPU; My Bus Probe and an IMS SIO-2 card that
was originally in the N*. I had to replace the Address Jumper Plug with
a Dip Switch and the Monitor recognizes it. The Code executes exactly
the same as the N*. So if I can get a new Prom with my Changes burnt it
might help me to Diagnose the Problem, I was able to add the DATA IN
Buss lines to the Bus Probe so now I can see the results of the IN 3 and
IN 2 calls. I still want to add a OUT 2 after each IN 3 so my 232
Analyzer can display the Results for me to help confirm what I am
seeing. I get good results from Single Stepping but if I "RUN" the Bus
probe the Output to the Analyzer looks like it is getting Multiple
Results from each execution of OUT's & IN's. Got to find a way to put a
Slow Stepper circuit somewhere on one of my Cards. I've got a MOD to the
IMSAI F/P but I'll have to figure out how to implement it Separately.
TIA
Bob in WI
6:14 p.m.
Hi Bob
Until someone can get your 2708, you might just program
a more current EPROM and make a socket adapter.
I always have a number of 32/28/24 machine pin
sockets around in case I need to read some mask ROM
with funny selects.
I just wire up whatever is needed at the time.
Dwight
Date: Wed, 29 Dec 2010 09:51:11 -0600
From: trebor77 at execpc.com
To: cctalk at classiccmp.org
Subject: Re: Looking for EPROM 2708 help
I still want to get the N* with Monitor working. I was able to get my
BYT-8 working with the N* CPU; My Bus Probe and an IMS SIO-2 card that
was originally in the N*. I had to replace the Address Jumper Plug with
a Dip Switch and the Monitor recognizes it. The Code executes exactly
the same as the N*. So if I can get a new Prom with my Changes burnt it
might help me to Diagnose the Problem, I was able to add the DATA IN
Buss lines to the Bus Probe so now I can see the results of the IN 3 and
IN 2 calls. I still want to add a OUT 2 after each IN 3 so my 232
Analyzer can display the Results for me to help confirm what I am
seeing. I get good results from Single Stepping but if I "RUN" the Bus
probe the Output to the Analyzer looks like it is getting Multiple
Results from each execution of OUT's & IN's. Got to find a way to put a
Slow Stepper circuit somewhere on one of my Cards. I've got a MOD to the
IMSAI F/P but I'll have to figure out how to implement it Separately.
TIA
Bob in WI
30 Dec
30 Dec
6:03 p.m.
New subject: Looking for a 26 PIN Female to a 25 PIN DB25 Ribbon Cable
I am Looking for a 26 PIN Female to a 25 PIN DB25 Ribbon Cable. I am
going to try to test a HSIO 4 Port Serial Card
Meant for a N* Horizon. I checked Jameco but they don't have any of the
26 Pin Female Ribbon Connectors thats fits over the Dual Row of PINs on
the HSIO card
TIA
Bob in Wisconsin
7:16 p.m.
New subject: Looking for a 26 PIN Female to a 25 PIN DB25 Ribbon Cable
On 30 Dec 2010 at 12:03, Robert J. Stevens wrote:
I am Looking for a 26 PIN Female to a 25 PIN DB25
Ribbon Cable. I am
going to try to test a HSIO 4 Port Serial Card Meant for a N* Horizon.
I checked Jameco but they don't have any of the 26 Pin Female Ribbon
Connectors thats fits over the Dual Row of PINs on the HSIO card TIA
Bob in Wisconsin
Jameco P/N 525413
(see catalog page
http://www.jameco.com/Jameco/catalogs/c103/P79.pdf )
Is this what you need?
--Chuck
5112
days inactive
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