HP-IB Medusa chip

[Rik Bos]

> -----Oorspronkelijk bericht-----
> Van: cctalk-bounces at classiccmp.org 
> [mailto:cctalk-bounces at classiccmp.org] Namens Tony Duell
> Verzonden: vrijdag 22 januari 2010 21:33
> Aan: cctalk at classiccmp.org
> Onderwerp: Re: HP-IB Medusa chip
> 
> > 
> > I'm trying to repair a HP260/30 which fails self-test at 
> step 9 (HP-IB 
> > Programmed I/O test). It seems that the HP-IB interface 
> card is the cause.
> > There's a 1TL1-0001 HP-IB controller IC and I'd like to know if it 
> > could be replaced with a 1TL1-0006. The other ICs are all 
> standard TTL 
> > (apart
> 
> >From what I rememnber, they are very similar devices... Somethign is
> telling me that the -0001 needs a 'strange' supply voltage or 
> bias signal, or something like that, the -0006 doesn't. 
> Wether the pin on the latter chip is a no-connect I don't know.
> 
> The HP98265 high=speed HPIB card for DIO machines uses one 
> version of the Medusa, if you can track down the manual for 
> that it might give you some help. I should be able to dig out 
> a pinout for it if that's any help.
> 
> -tony

I'm not sure but I think the first versions of the medusa were SOS chips,
(Silicon on Saphire).
I know the 1000 L versions and the 500 series used SOS chips, I'm not sure
for the HP 260's.

-Rik