ialers. (Liam Proven) 3. Re: Modems and external
dialers. (Liam Proven) 4. Re: Modems and external dialers. (Peter Corlett)
5. Re: Modems and external dialers. (Peter Corlett) 6. Re: Modems and
external dialers. (Liam Proven) 7. Re: Modems and external dialers. (Liam
Proven)
move from
positive logic to negative logic.
Another use for the tristate is to make an OC output.
Dwight
From: Brian L. Stuart
Sent: Tuesday, June 11, 2019 10:44 AM
To: Paul Berger; General Discussion: On-Topic and Off-Topic Posts; dwight
Subject: Re: HP9816 PAL16L
On 6/11/19 11:40 AM, Paul Berger via cctalk wrote:
>
> Well in this case I have Mr Duell's schematic to go by to determine what
> is input an what is output. For the 16L8 tristate is an available
> output option that you would need to specify in PLD design and I believe
> can be selected individua
On 2019-06-11 3:17 p.m., Chuck Guzis via cctalk wrote:
On 6/11/19 10:54 AM, Tony Duell via cctalk wrote:
I have just remembered something that I guess you realised some time
back...
The 16L8 allows you to tri-state outputs under logic control (I think there's
one AND term for the output cont
On 6/11/19 10:54 AM, Tony Duell via cctalk wrote:
> I have just remembered something that I guess you realised some time
> back...
>
> The 16L8 allows you to tri-state outputs under logic control (I think there's
> one AND term for the output control of each output). I suspect this is used
> in t
On Tue, Jun 11, 2019 at 1:50 PM Paul Berger via cctalk
wrote:
> The process documented above is essentially the process I started last
> night, but in my case I used a GPIO in my HP 9000-332 to cycle through
> the inputs and record the output. It is very handy to have general
> purpose parallel
On Tue, 6/11/19, dwight via cctalk wrote:
> When I needed to create a PAL from a schematic, I first made
> a schematic of what the PAL was suppose to do, using the
> same basic model of logic that the PAL provided. Once I was
> done, I took the PAL map from the TI book and made red dots
> on each
f a PAL ( that I didn't have anyway ).
Dwight
From: cctalk on behalf of Paul Berger via
cctalk
Sent: Tuesday, June 11, 2019 5:54 AM
To: cctalk@classiccmp.org
Subject: Re: HP9816 PAL16L8
On 2019-06-11 1:19 a.m., Chuck Guzis via cctalk wrote:
> On 6/10/19 8:4
On 2019-06-11 1:19 a.m., Chuck Guzis via cctalk wrote:
On 6/10/19 8:44 PM, Tony Duell via cctalk wrote:
You can detect sequential logic in the PAL by :
For each combination of inputs :
Read the outputs
Toggle an input (change from 0 to 1 and back again or vice versa)
Compare
On 2019-06-11 6:17 a.m., Paul Birkel via cctalk wrote:
-Original Message-
From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Chuck Guzis
via cctalk
Sent: Tuesday, June 11, 2019 12:19 AM
To: Tony Duell via cctalk
Subject: Re: HP9816 PAL16L8
On 6/10/19 8:44 PM, Tony Duell
>-Original Message-
>From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Chuck Guzis
>via cctalk
>Sent: Tuesday, June 11, 2019 12:19 AM
>To: Tony Duell via cctalk
>Subject: Re: HP9816 PAL16L8
>
>On 6/10/19 8:44 PM, Tony Duell via cctalk wrote:
>
&
On 6/10/19 8:44 PM, Tony Duell via cctalk wrote:
>
> You can detect sequential logic in the PAL by :
>
> For each combination of inputs :
>Read the outputs
> Toggle an input (change from 0 to 1 and back again or vice versa)
> Compare the outputs to what they were before -- if they
On Tue, Jun 11, 2019 at 12:23 AM Paul Berger via cctalk
wrote:
>
>
> On 2019-06-08 7:14 a.m., Piero Andreini via cctalk wrote:
> > desperately looking for jedec file of PAL 16L8 position U69 part # 1820-2991
> We can hope that it is all combinational logic and I can run trough all
> combinations
On 2019-06-08 7:14 a.m., Piero Andreini via cctalk wrote:
desperately looking for jedec file of PAL 16L8 position U69 part # 1820-2991
I pulled the CPU board out of my HP9816 and was happy to see that the
component in question is in a socket however there is a problem. The
component in min
ng more complicated. One can
> often determine the logic by looking at a schematic and knowing what it needs
> to do.
> Dwight
> From: cctech on behalf of Piero Andreini via
> cctech
> Sent: Monday, June 10, 2019 7:58 AM
> To: cct...@classiccmp.org
> Subject: Re: HP981
> L series are combinatorial only. You (or someone who has a working one)
> should be able to figure out a logic map by either running through all
> the input permutation or putting it in a reader that will do the same
> (vs reading the fuse data).
>
> -Alan
>
> Good luck.
unfortunately I
: cct...@classiccmp.org
Subject: Re: HP9816 PAL16L8 (a...@alanlee.org)
> L series are combinatorial only. You (or someone who has a working one)
> should be able to figure out a logic map by either running through all
> the input permutation or putting it in a reader that will do the s
On Sat, Jun 8, 2019 at 6:18 PM Alan Hightower via cctech
wrote:
>
>
> L series are combinatorial only. You (or someone who has a working one)
Not so. The 16L8 has feedback connectoionsfrom the outputs to the logic
array. So while there are no registers (D types), you can make SR type
circuits in
L series are combinatorial only. You (or someone who has a working one)
should be able to figure out a logic map by either running through all
the input permutation or putting it in a reader that will do the same
(vs reading the fuse data).
-Alan
Good luck.
On 2019-06-08 11:05, Piero And
sm.
Dwight
From: cctech on behalf of Alan Hightower via
cctech
Sent: Saturday, June 8, 2019 10:18 AM
To: General Discussion: On-Topic Posts
Subject: Re: HP9816 PAL16L8
L series are combinatorial only. You (or someone who has a working one)
should be able to figure out a logic map by eith
desperately looking for jedec file of PAL 16L8 position U69 part # 1820-2991
desperately looking for jedec file of PAL16L8 position U69 part # 1820-2991 for
my HP9816
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