desoldering problems and technique (and amiga 2000 mod)

[geoffrey oltmans]

Good point... you would think they would have opted to make the ISA slots a completely separate board from the mainboard to save some coin... and then sell that with the bridgeboard instead of including it with the motherboard. Those extra ISA slots take up a tremendous amount of real estate.





________________________________
From: Ethan Dicks <ethan.dicks at gmail.com>
To: General Discussion: On-Topic and Off-Topic Posts <cctalk at classiccmp.org>
Sent: Mon, January 4, 2010 10:23:15 AM
Subject: Re: desoldering problems and technique (and amiga 2000 mod)

On Mon, Jan 4, 2010 at 6:59 AM, Steven Hirsch <snhirsch at gmail.com> wrote:
> On Sun, 3 Jan 2010, Gene Buckle wrote:
>
>>> Now it's time to solder the isa connectors to the 2000 motherboard.
>>> It's the scary part for me.  :-)
>>>
>> Does anyone know why the connectors were left off the board in the first
>> place?  It seems kind of silly since they went to the effort to route the
>> signals and have the holes drilled.
>
> To save $0.50 per slot, I'd imagine.

That and probably because some 8-bit cards slopped into what later
became the spot for the 16-bit extension.  That's why most ISA boards
still had 1-2 8-bit slots until very late in the game.

But C= was notoriously cheap, so I'm sure they jumped at the chance to
save a few pennies (and back when the A2000 was being designed, people
*did* still use 8-bit serial cards and such).

-ethan