100% agree with that Lee. I was browsing Mouser's web page looking at static RAM chips*, and I noticed that the Cypress CY7C199 32kx8 was in stock (CY7C199D SOJ28 only). The data sheet (last revision

#ide #Homebrew #Pico-Elf-V2

wrcooke@... wrote: Arrgh! I don't think I'll live that long. Besides, there are a lot of other things I'd like to get done. Like trying to keep up with the frantic pace of posts on the cosmace

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When you have a few (hundred) spare hours, it would be good if you could scan those and put them up on bitsavers and/or archive.org :-) Will

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ian may via groups.io wrote: I'm the same way. I probably have 100 feet of bookshelf space, and kept a full set of databooks from the 1970's and 80's. I'm glad I did. There is more data in the old pap

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Hi Tony, I was lucky enough to know someone who was about to send a bunch of old data books to paper recycling. Not many made it there though :) Cheers, Ian.

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Hi Wayne, there is also a 3 page Motorola MC146818 application note here : http://bitsavers.org/components/motorola/_appNotes/AN-0856_Low_Power_Considerations_MC146818.pdf Cheers, Ian.

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Hi Chuck I'm afraid I skipped right over CF cards so I've got nothing to judge the performance of this little microSD/IDE adapter against. (The last time I used IDE it was with actual hard drives.) No

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Wayne, I like the idea of going with SD rather than CF. Now I have a CF system running RCA's MicroDOS and its been great, but CF cards are expensive and not as available as SD. I'm planning an Elf/OS

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Thank you for this link Ian. So nice to see all these data books we used to have. Doing a google is ok when your just trying to find a chip or 2, but having what we all used to be on our shelves is al

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Hi Gaston That's great news; if you can use the MISO/D12 pin for either /RESET or /OUTP4 that'd be much less disruptive than either the RX or TX pins. And you had the one OR gate spare too; that worke

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Hi Ian Thanks for those links; I actually didn't know about the A chip. Reading thru its datasheet produced a couple of "ah, so that's why that doesn't work with mine; they fixed it in the A version".

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Hi Wayne, Thank you for sharing that. On the SPI version, the SPI MISO pin D12 is actually unused since the GLCD is write only. So D12 can be used as an input pin, even though hardware SPI reserves it

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Hi Wayne, you may already know this, but for the potential benefit of other readers, the Dallas clock chips are based on an MC146818A which is a different piece of silicon to an MC146818. As well as b

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"Lee Hart" <leeahart@...> wrote: Lee, Hmm. There's room for a 6850 right now, but not for a baud rate generator. And I don't have one in my parts drawers and I'd have to rewrite the UART cod

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Gaston, Here's a modified copy of your sketch and a diff file. This is for an I2C connected display rather than an SPI one, so it had a spare pin available for /OUTP4. To do this with an SPI display,

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Wayne Hortensius wrote: Do you have room for a 6850 UART? It's in a 24-pin package. There is even a TI 16-pin UART chip, though I can't think of the part# right now. That's a really clever idea! :-) L

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Wayne, Very cool! Thanks for posting the picture. I am really interested in the mod you made to add the virtual TIL311 to the Teensy Pixie Video display. That's a brilliant idea. Can you share the cod

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Bernie; My first computer project was a wire wrapped 8080A with a whole 1K of RAM. And that was far longer ago than I care to admit or remember! But as far as the 1802 is concerned, I'm coming on the

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Wayne: That is truly an awesome breadboard layout. This is obviously not your first computer project. Make sure you keep pictures of your setup for the next generation to marvel at ...

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Hi Bernie And squashing a bug at midnight on a Sunday... ahhhhh! Was your feedback helpful? It was absolutely essential, thank you so much. You gave me exactly what I needed. "Check this." "Try changi

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