Hi
Are you still looking to purchase STC executel, I have just found my old one in
the cupboard under my bed and could sell.
Please email me if interested
Regards
Peter
Sent from my iPhone
On 21/12/2016 19:37, "Brent Hilpert" wrote:
> On 2016-Dec-17, at 10:34 AM, Adrian Graham wrote:
>> One problem I have is that I've already found a few chips with dead outputs
>> so I've no idea if these will be any different. The pinouts I have match the
>> LS92 since pins
On 2016-Dec-21, at 11:44 AM, Tony Duell wrote:
> On Wed, Dec 21, 2016 at 7:37 PM, Brent Hilpert wrote:
>
>> The counters may be the beginning of a video timing divider chain or a clock
>> divider for the LUCY chip.
>> (e.g. a diagram in the document you mentioned shows a
On Wed, Dec 21, 2016 at 7:37 PM, Brent Hilpert wrote:
> The counters may be the beginning of a video timing divider chain or a clock
> divider for the LUCY chip.
> (e.g. a diagram in the document you mentioned shows a div-6 between a 6MHz
> crystal osc and the LUCY chip.
>
On 2016-Dec-16, at 5:43 AM, Adrian Graham wrote:
> viewdata side of things is powered by a Plessey MR9735-002 teletext
> processor supported by a pair of 2112 RAM chips and an SAA5070 "LUCY".
>
> http://txlib.mb21.co.uk/main.php?g2_view=core.DownloadItem_itemId=2034
On 2016-Dec-17, at 10:34 AM,
On 17/12/2016 18:49, "Tony Duell" wrote:
>>> What value resistor?
>>
>> It's a 5-band red-red-black-black-violet so either 220R or 70k? Based on
>> what Pete said about the Z80 I'm going for 220R without pulling it out of
>> circuit.
>>
>
> Yes. I would agree with that.
On Sat, Dec 17, 2016 at 6:34 PM, Adrian Graham
wrote:
> On 17/12/2016 14:28, "Tony Duell" wrote:
>
>> On Sat, Dec 17, 2016 at 2:02 PM, Adrian Graham
>> wrote:
>>>
>>
>>>
>>> Thanks all, the pinouts are matching
10:34:01 AM
To: General Discussion: On-Topic and Off-Topic Posts
Subject: Re: Mystery 8085-related IC identification needed please
On 17/12/2016 14:28, "Tony Duell" <ard.p850...@gmail.com> wrote:
> On Sat, Dec 17, 2016 at 2:02 PM, Adrian Graham
> <wit...@binarydinosaur
On 17/12/2016 14:28, "Tony Duell" wrote:
> On Sat, Dec 17, 2016 at 2:02 PM, Adrian Graham
> wrote:
>>
>
>>
>> Thanks all, the pinouts are matching the LS9x counters so I just need to
>> trace more lines to hopefully narrow it down. Pins 6
On 17/12/2016 14:28, Tony Duell wrote:
On Sat, Dec 17, 2016 at 2:02 PM, Adrian Graham
wrote:
Thanks all, the pinouts are matching the LS9x counters so I just need to
trace more lines to hopefully narrow it down. Pins 6 and 7 are definitely
inputs so you're right
On Sat, Dec 17, 2016 at 2:02 PM, Adrian Graham
wrote:
>
>
> Thanks all, the pinouts are matching the LS9x counters so I just need to
> trace more lines to hopefully narrow it down. Pins 6 and 7 are definitely
> inputs so you're right Tony, the reset must come from
On 16/12/2016 18:25, "Tony Duell" wrote:
> On Fri, Dec 16, 2016 at 6:19 PM, Peter Coghlan
> wrote:
>>>
>>> They aren't 'standard' 14-pin DIPs in that they don't follow the
>>> GND-on-pin-7-Vcc-on-pin-14 layout. Pins 6 and 7 on both are wired
On 12/16/2016 08:43 AM, Adrian Graham wrote:
> Hi folks,
>
> I have an 8085-based viewdata telephone system on the bench that's proving
> to be a labour of love in trying to get it running with zero documentation -
> there are only 6 known examples that I've come across and all but 2 of them
> are
On Fri, Dec 16, 2016 at 6:19 PM, Peter Coghlan wrote:
>>
>> They aren't 'standard' 14-pin DIPs in that they don't follow the
>> GND-on-pin-7-Vcc-on-pin-14 layout. Pins 6 and 7 on both are wired together
>> (not to GND) and form the RESET signal for the 8085 via the 7414
>
> They aren't 'standard' 14-pin DIPs in that they don't follow the
> GND-on-pin-7-Vcc-on-pin-14 layout. Pins 6 and 7 on both are wired together
> (not to GND) and form the RESET signal for the 8085 via the 7414 at 10A,
> source for this signal is unknown currently. Pin 5 on both appears to be
From: Adrian Graham: Friday, December 16, 2016 5:43 AM
They aren't 'standard' 14-pin DIPs in that they don't follow the
GND-on-pin-7-Vcc-on-pin-14 layout. Pins 6 and 7 on both are wired together
(not to GND) and form the RESET signal for the 8085 via the 7414 at 10A,
source for this signal is
Hi folks,
I have an 8085-based viewdata telephone system on the bench that's proving
to be a labour of love in trying to get it running with zero documentation -
there are only 6 known examples that I've come across and all but 2 of them
are in museums, none known to work. If any of you fancy
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