Advice for Tek 4051 vector-drawing issue?

[Philip Belben]

Tony Duell wrote:
>> (Using a 405x with an 8050 is a PAIN.  You send all the commands to the 
>> drive to find the file and be ready to load it.  You then type OLD at 8 and 
>> what does the machine do?  Why, asserts IFC, of course.  But there are 
>> ways around this.  I wonder if I can find my notes...)
> 
> If this were my system,. I think I'd modify that 8050 to ignore IFC. I 
> don't have the service manual in front of me, but it's probably jsut a 
> matter of cutting the trace to the apporpriate pin of the IEEE-488 
> socket. 8050s are a lot more common that 405x's, adter all, so I'd modify 
> that end (not to mention the fact that there are times when I'd want to 
> be able to reset other devices from the 405x.
> 
> If you could find an 8250LP, the IEEE-488 connection in that goes through 
> an intenral cable which would be easy to reversably modify.

Tony, you may rest easy.  The workaround involves chaining the program 
rather than loading it from scratch.  This doesn't assert IFC.

As regards an 8250LP, I think I used the disk drive mounted in my 8296 
in situ, using the 8296 to check that it was working...

I want a MUPET.

Philip.