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On Tuesday, March 20, 2018 at 5:54:53 PM UTC-4, Gareth's Downstairs Computer wrote:
> I think recently that we discussed the DigiComp
> plastic binary adder (with stick-on paper 1 and 0!),
> but preceding that, I was involved with wiring up
> NOR gates with OC200 or OC201 transistors for the
> school's first "computer".
> 
> This was about 1966 when I was 15.

Hands-on, it was a Digi-Comp I, in 1971, but I think before that,
I bought a biorhythm printout at the mall generated by an IBM 1130. 
And I was with my parents one day at some affair in the late 60s, 
and saw what I think was an IBM 1620. I'm not sure, but my memory 
leads me to think the knob I saw on this machine looked like the 
MAR Display Selector on the 1620.

My first hands on one was a Wang 2200 in the early/mid 1970's.  My school would borrow one for a few weeks at a time.

Then built an Cosmac Elf based on the 1802.  One of these days, I'd love to see or get my hands on a Wang 2200 again.

On 2018-03-22, David Jones <djon...@gmail.com> wrote:

> My first hands on one was a Wang 2200 in the early/mid 1970's.
> My school would borrow one for a few weeks at a time.
>
> Then built an Cosmac Elf based on the 1802.  One of these days,
> I'd love to see or get my hands on a Wang 2200 again.

My uncle took me to his place of work, where I got to play with a
Univac 1004.  This was like an electronic version of the IBM 407,
still programmed by plugboard but with 961 6-bit bytes of real core.
Its card reader and printer ran at 400 cards/lines per minute.
This particular machine used 90-column cards, although an 80-column
model was available.  (The card reader could handle both, you just
needed a different punch.)  I still have the manuals.

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On 22/03/2018 14:34, David Jones wrote:
> My first hands on one was a Wang 2200 in the early/mid 1970's.  My school would borrow one for a few weeks at a time.
> 
> Then built an Cosmac Elf based on the 1802.  One of these days, I'd love to see or get my hands on a Wang 2200 again.
> 
> 

ISTR on the 1802 to have to go round the houses in order to
implement subroutine calls?

On 20/03/2018 21:54, Gareth's Downstairs Computer wrote:
> I think recently that we discussed the DigiComp
> plastic binary adder (with stick-on paper 1 and 0!),
> but preceding that, I was involved with wiring up
> NOR gates with OC200 or OC201 transistors for the
> school's first "computer".
> 
> This was about 1966 when I was 15.

Which school Gareth?

On 23/03/2018 21:11, David Wade wrote:
> On 20/03/2018 21:54, Gareth's Downstairs Computer wrote:
>> I think recently that we discussed the DigiComp
>> plastic binary adder (with stick-on paper 1 and 0!),
>> but preceding that, I was involved with wiring up
>> NOR gates with OC200 or OC201 transistors for the
>> school's first "computer".
>>
>> This was about 1966 when I was 15.
> 
> Which school Gareth?

Nailsea Grammar School, under the aegis of
maths teacher D.E.Lane.

On Fri, 23 Mar 2018 21:11:35 +0000, David Wade wrote:

> On 20/03/2018 21:54, Gareth's Downstairs Computer wrote:
>> I think recently that we discussed the DigiComp plastic binary adder
>> (with stick-on paper 1 and 0!),
>> but preceding that, I was involved with wiring up NOR gates with OC200
>> or OC201 transistors for the school's first "computer".
>> 
>> This was about 1966 when I was 15.
> 
> Which school Gareth?

Not sure, but I'm sure it was approved.

-- 
Using UNIX since v6 (1975)...

Use the BIG mirror service in the UK:
 http://www.mirrorservice.org

On 23/03/2018 22:02, Bob Eager wrote:
> On Fri, 23 Mar 2018 21:11:35 +0000, David Wade wrote:
> 
>> On 20/03/2018 21:54, Gareth's Downstairs Computer wrote:
>>> I think recently that we discussed the DigiComp plastic binary adder
>>> (with stick-on paper 1 and 0!),
>>> but preceding that, I was involved with wiring up NOR gates with OC200
>>> or OC201 transistors for the school's first "computer".
>>>
>>> This was about 1966 when I was 15.
>>
>> Which school Gareth?
> 
> Not sure, but I'm sure it was approved.
> 

Grow up, Sonny.

Bob Eager <news...@eager.cx> wrote:
> On Fri, 23 Mar 2018 21:11:35 +0000, David Wade wrote:
> 
>> On 20/03/2018 21:54, Gareth's Downstairs Computer wrote:
>>> I think recently that we discussed the DigiComp plastic binary adder
>>> (with stick-on paper 1 and 0!),
>>> but preceding that, I was involved with wiring up NOR gates with OC200
>>> or OC201 transistors for the school's first "computer".
>>> 
>>> This was about 1966 when I was 15.
>> 
>> Which school Gareth?
> 
> Not sure, but I'm sure it was approved.
> 

Secure unit, more like. 

-- 
STC / M0TEY / 
http://twitter.com/ukradioamateur

On 23/03/2018 21:33, Gareth's Downstairs Computer wrote:
> On 23/03/2018 21:11, David Wade wrote:
>> On 20/03/2018 21:54, Gareth's Downstairs Computer wrote:
>>> I think recently that we discussed the DigiComp
>>> plastic binary adder (with stick-on paper 1 and 0!),
>>> but preceding that, I was involved with wiring up
>>> NOR gates with OC200 or OC201 transistors for the
>>> school's first "computer".
>>>
>>> This was about 1966 when I was 15.
>>
>> Which school Gareth?
> 
> Nailsea Grammar School, under the aegis of
> maths teacher D.E.Lane.
> 
I used a similar beast at Darlington 6th form college. Used screw-in 
flash lamp bulbs to display memory content. Had to fill it full of "1" 
bits and tighten all the bulbs. Designed by Hector Parr

http://www.hectorparr.freeuk.com/index.htm

who was the Music teacher, and built by the pupils...

Dave

> 
> ISTR on the 1802 to have to go round the houses in order to
> implement subroutine calls?

Yes, they were funny little cpu's. There are yahoo and facebook groups on them.  In fact you can get get kits to build a simple computer based on one.

On 24/03/2018 21:20, David Jones wrote:
> 
>>
>> ISTR on the 1802 to have to go round the houses in order to
>> implement subroutine calls?
> 
> Yes, they were funny little cpu's. There are yahoo and facebook groups on them.  In fact you can get get kits to build a simple computer based on one.
> 
> 

Almost as bad as the SC/MP   :-(

On 3/24/2018 4:20 PM, David Jones wrote:
> 
>>
>> ISTR on the 1802 to have to go round the houses in order to
>> implement subroutine calls?
> 
> Yes, they were funny little cpu's. There are yahoo and facebook groups on them.  In fact you can get get kits to build a simple computer based on one.
> 
> 

So you *really* mean that the 1802's *are* funny little CPU's...  as the 
1802 is still being used!!!

-- 
numerist at aquaporin4 dot com

True, I should have said are.  Sometimes, my typing gets ahead of my thinking or the other way around.  I have an Elf 2000 and getting ready to build a Quest Super Elf reproduction.

On 3/25/2018 11:22 AM, David Jones wrote:
> True, I should have said are.  Sometimes, my typing gets ahead of my thinking or the other way around.  I have an Elf 2000 and getting ready to build a Quest Super Elf reproduction.
> 

It's true that the 1802 is an older processor, but it still has some 
life left in it yet!   :-)

-- 
numerist at aquaporin4 dot com