Re: Software serial and overclocked 1802's #microboards #system1

Lee Hart

ajparent1/kb1gmx wrote:
Already been there. Jameco has been a long time supplier I've used
going back to the 70s.
Same for me. I borrowed one of their 1970's ads from an old Byte magazine to use in my Z80MC manual ( page 13). You can see they had just about all the same parts needed for vintage computing today (and their prices).

Jameco has always sold surplus; manufacturer over-runs, stuff they bought at an auction when a company went out of business, etc. But I have to say... they are now getting into el-crappo Chinese junk parts. Jameco is now selling some of the same fake remarked ICs that you can get on ebay. I bought a batch of 32k RAMs from them that were obviously re-marked, and all bad. Caveat emptor.

Looking at the various board there is a lot of repeated circuitry
(mostly for bus) so I'm
looking at if I do this how to cut the total parts
One feature of CMOS is its negligible input current. You often don't need bus drivers; that can save a lot of chips. You just get more capacitive loading, so the ultimate maximum speed isn't as high.


ICEs have the same problem as lightbulbs. Why innovate and make
better ones when the current ones burn out often enough to keep
you in business? -- Hunter Cressall
Lee Hart, 814 8th Ave N, Sartell MN 56377,

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