JJ
Guest
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 Posted:
Wed Sep 14, 2005 4:15 pm Post subject:
Re: Making a small core memory module |
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Paul wrote:
| Quote: | Hi all,
If this isn't the right newsgroup, please point me to the correct one!
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Look for home brew, or the fpga or electronics or embedded groups, read
before you post to get a feel if interest matches, theres probably a
few you can go to, hook up with Skywalker or what ever too. Search
google groups for subject and see which groups match, <PIC hobby LCD
....>
| Quote: | I was looking at some vintage calculators on ebay and with some google
lookups I found www.vintagecalculators.com and the Casio AL-1000
http://www.vintagecalculators.com/html/casio_al-1000.html
Could I take a small ferrite core (those fragile 1/16 - 1/8" donuts that
are on pc boards nowadays) and use them with enamel magnet wire? What type
of current/voltage is required to shift the polarity of the say a 1/16"
cylindrical core? I'd like to use a PC parallel port right now to switch
some 3904's if possible.
I'd like to make 1 bit memory to start out with, probably ending with an
8bit core.
Just thinking it would be cool to make a PIC powered HD44180 based LCD
calculator with 32 bits of core memory :-)
Paul
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Um I don't think core memory would be cool at all, thats a whole other
project in itself. I almost bought a 4K.12 core stack once without the
electronics, glad I never wasted time on it too.
The Calculator project though would be more interesting with any ready
made newer FPGA board with onboard keypad, LCD, SRAM etc. Or even use a
ready made embedded cpu board with PIC if you will.
JJ |
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