KIM-1 and Apple 1

[Hans Otten]

[Jeff M. Nay]

Beautiful !!!

 

From: ki...@googlegroups.com [mailto:ki...@googlegroups.com] On Behalf Of Hans Otten
Sent: Friday, August 12, 2022 10:37 AM
To: KIM-1
Subject: KIM-1 and Apple 1

 

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[Jeff M. Nay]

I am making progress with the Corsham 6530-002 replacement board. Although there is still some work left to do…

 

Looks like just the upper half of the seven segment displays is not working. When I type in an address 1111. I can see half of the 1’s going in.

Also looks like the is a problem with segment C on the lower right.  

 

 

 

With just 6530-002 replaced	Piggy backing all memory

[Jeff M. Nay]

I was looking at U17 myself, but when I looked at my parts bin, that was the one chip that I do not have… :o(

So, it looks like I will have to order a few, to have on hand. In the mean time I will just do some signal tracing.

 

This poor KIM-1 must have taken one heck of a shoot. I will probably end up testing U3 as well, while I wait.

If it is also bad, it will be impossible to get this KIM-1 fully functional, unless someone comes up with a better

Replacement for the 6530s or a replacement that can replace both of them at the same time.

 

I might try connecting TTY to see if I can run a mem test or do anything else for that matter.

 

 

From: h.o...@hansotten.com [mailto:h.o...@hansotten.com]
Sent: Saturday, August 13, 2022 3:25 AM
To: 'Jeff M. Nay'
Subject: RE: KIM-1 and Apple 1

 

Good progress! Bob makes fine products!

The KIM-1 is running its ROM again.

 

Have a good look at U17, 7406, it may be the problem of segments not lighting.

and run a memory test, I am not sure piggybacking faulty memory is enough.

 

From: Jeff M. Nay <nove...@gmail.com>
Sent: Friday, 12 August 2022 20:12
To: 'Hans Otten' <hansj...@gmail.com>; 'KIM-1' <ki...@googlegroups.com>
Subject: RE: KIM-1 and Apple 1

 

I am making progress with the Corsham 6530-002 replacement board. Although there is still some work left to do…

 

Looks like just the upper half of the seven segment displays is not working. When I type in an address 1111. I can see half of the 1’s going in.

Also looks like the is a problem with segment C on the lower right.  

 

 

 

With just 6530-002 replaced	Piggy backing all memory

 

 

From: ki...@googlegroups.com [mailto:ki...@googlegroups.com] On Behalf Of Hans Otten
Sent: Friday, August 12, 2022 10:37 AM
To: KIM-1
Subject: KIM-1 and Apple 1