How to lose most of an an entire collection in one shot

[Rik Bos]

> -----Oorspronkelijk bericht-----
> Van: cctalk-bounces at classiccmp.org 
> [mailto:cctalk-bounces at classiccmp.org] Namens Tony Duell
> Verzonden: maandag 22 juni 2009 20:07
> Aan: cctalk at classiccmp.org
> Onderwerp: Re: How to lose most of an an entire collection in one shot
> 
> > > I'd much rather have an HP9000/200....
> > > 
> > > -tony
> > > 
> > Me too, and for the speed a HP 9000/300 ;-)
> 
> I am sure yuo realise why I prefer the series 200 to the 
> series 300... 
> Perhaps I am being unkind -- the only 9000/300 machine I'ev 
> been inside is the model 340, and it seemed to be stuffed 
> with unrecognisable PGA-packaged ICs. At least the series 
> 200s are mostly standard parts with the odd PAL, ROM and 
> microcontroller thrown in.

The processor and memory boards of the 350/360 are build from TTL and
PAL's(lots of them)
I just fixed a 16Mb memoryboard for my 360 by reverse eng. the memory
decoding and buffering circuits.
The interface board contains 1 big pga i/o chip (propriarity hp) but the
rest is TTL and some LSI-chips.
The hi-res video boards are build from pga's and ram, but you use also older
video boards
Or plant a 68030 acceleratorboard in a HP 9816, you wouldn't beleivbe your
eyes how fast the thing gets then ;-)

The 345/375 and 382 types are more 'modern'and build in SMD with a lot of
special function chips.
But the 345 has a 68040 emulator board wit a 68030 implemented.

So please don't throw them all away because of a few pga's ;-)



> > I like the view of a HP 125 ET-head but it is not a very 
> handy machine.
> 
> It is an interesting styling and odd to work on -- release a 
> quarter-turn fastener, slide the casing slightly forwards on 
> the stand, then lift it up on a stay. You can then release 
> some Nylatch clips and lower the processor board to work on that,

I worked on mine it had a bad video/terminal ram chip, thanks to the
diagnostic LED's it was easy to find.
With not very handy I was refering to the use of the machine, and it is big
takes a lot of space.


> The HP120, BTW (and the oriignal HP150, which has much the 
> same physical
> layout) is odd... You can remvoe the top casing with 2 
> quarter-turn fasteners, but that jsut  gets you to the PSU 
> and monitor PCBs. To get to the logic boards, you have to 
> unclip the battery pack, then remove the jackposts on all the 
> connectors, and then remove 5 screws and the rear panel of 
> the card cage. 

> 
> -tony
> 
Rik