--- In email@example.com
, Jeff Galinat <jgalinat@...> wrote:
> On 4/2/2013 6:54 PM, DanielB wrote:
> > Thanks for the input. Neither my front panel nor CPU board (except the
> > Z80 add-on) are socketed so no issue with tarnished pins, but I will
> > have to check that on the other boards.
> > I seem to have it running small programs ok now, but it looks like I
> > have a problem with the 8212 latch on the front panel that is used to
> > drive the LEDs that can be written to on IO port FF. All the input
> > signals look ok, even checked the timing with a logic analyzer, but I
> > still get no output to the LEDs. I am guessing that is no an easy chip
> > to get a replacement for.
> Hi Daniel,
> Actually the 8212 is fairly easy to get. It is $5 at Unicorn
> Electronics <http://www.unicornelectronics.com/IC/8000.html> It is $1.49
> at Anchor Electronics (not a labeled 8212 but an equivalent 74S412) .
> Anchor does not have a on line ordering system but the printed catalog
> is here <http://www.anchor-electronics.com/weblist.pdf> and the
> 8212/74S412 is listed under 8000/8200 series mid page on the left side
> on page 8.
> They are also available on eBay at 3 for $10 with $2 shipping
Thanks! Guess I didn't look very hard :)