Archived from groups: rec.games.vectrex (
More info?)
Thanks,
I did draw it as it was, and those are the ones, at least on my only vectrex
board, that were in sockets. I really try to keep them as accurate as I can.
I even do my best to have all the resistor color codes correct, though I
will remove a heat sink sometimes to show the actual chip.
I have noticed on other systems, computers and games, that it can vary
between boards. I am cleaning up some atari 5200 boards and one has most of
the chips socketed, while the other only has the larger ones socketed and
both show the same revision number.
I wish it was law that all chips had to be in a socket :>)
I always try to add one whenever I have to switch one out...
Ron
"Eric Smith" <eric-no-spam-for-me@brouhaha.com> wrote in message
news:qhmzwke10i.fsf@ruckus.brouhaha.com...
> "netnews.insightbb.com" <ok@ok.com> writes:
>> I have completed my drawing of the Vectrex Logic Board.
>> Should be suitable for framing..
>
> Very nice! Thanks!
>
> A question for those of you that have looked at the a lot of Vectrex
> logic boards: do all Vectrexes have the same selection of chips
> socketed? The parts list in the service manual lists enough sockets
> for all 13 chips, but Ron's drawing only appears to show sockets for
> six of them (those with an asterisk in this list):
>
> * IC201: 8K*8 ROM
> IC202: 74LS00
> IC203: 74LS32
> IC204: 2114 RAM
> IC205: 2114 RAM
> IC206: MC68A09 CPU
> * IC207: 6522 VIA
> * IC208: GI AY-3-8912 sound
> * IC301: MC1408P8 DAC
> * IC302: 4052B or MC14052B mux
> * IC303: LF347/TL084/MC34004P quad opamp
> IC304: LF353/TL082/MC34002P dual opamp
> IC305: 4066B or MC14066B transmission gates
>
> In particular, I'm curious whether all units have the ROM socketed.
>
> From a manufacturing point of view, it would make sense to omit most or
> all of the sockets. The direct cost is obviously lower, but there is
> also the indirect benefit that soldered connections are more reliable
> than socketed connections, resulting in fewer returns.