Josh/Don,
I was gathering parts for my build & I have some questions about
possible errors with the BOM for the 8080 CPU board.
1) I see that RP2 is now listed as a 47K network (was formerly a 4.7K
network) but I did not see that change documented anywhere. I realize
that the value of RP3 changed as documented in ECO#3 but I found nothing
about RP2.
2) IC E6 is now listed as a 74LS90 in the BOM but it is a 74LS390 in the
schematic, in the original parts list in the manual & on the board
silkscreen. The LS390 is a dual counter an is a 16 pin dip while the
LS90 is a single counter in a 14 pin dip.
3) I didn't see the recommended crystal X1 (18.432mhz) is not listed in
either the original parts list or the updated BOM. I was just going to
pick the one that Mouser has in stock.
Thanks for all you are both doing for this project. I am look forward
to this build as well as as the Mini-FP board.
Regards,
Jeff Galinat
On 8/2/2014 3:43 PM, Crusty OMO wrote:
Hi Don,
Sure. I wrote it into the Rev 2 Manual. I also updated your
Bill-of-materials with the right values for RP2, but I missed adding
it as an ECO there.
Cheers,
Josh
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