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Getting it working. http://anycpu.org/forum/viewtopic.php?f=23&t=1079 |
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Author: | oldben [ Mon Mar 11, 2024 6:25 am ] |
Post subject: | Re: Getting it working. |
Found some defective parts with the alu. Fixed that now waiting for new parts that I forgot to order or ran out of LSXXX. |
Author: | oldben [ Thu Mar 14, 2024 2:14 am ] | ||
Post subject: | Re: Getting it working. | ||
Added a quick and dirty INTEL 82C54 timer. I have gone as far as I want with this proto type setup hardware wise. 3 uarts, and two CF cards and timer chip. Ordered more LSXXX parts, and a different CF adaptor. I wanted to add a real time clock interrupt, but I needed to wait a month for parts. Memory wise, it will be full to the gills, 64 K ram user space and 64K ram O/S space. Algol ready with recusive procedures and limited bolean logic. I need a good name for this 24 bit beast still.
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Author: | oldben [ Mon Mar 18, 2024 2:51 am ] |
Post subject: | Re: Getting it working. |
Going backwards in time. Found a few defective bus drivers, thus I am at the "print the welcome message" and crash after that. Needed a longer reset to get the Front Panel working. Tomorrow working on busing problems. |
Author: | oldben [ Sun Mar 24, 2024 2:59 pm ] | ||
Post subject: | Re: Getting it working. | ||
I got more ringing in the clock lines than I expected. Since this requires a complete rebuild to clean up, I am down sizeing to 20 bits, and rebulding a new computer.
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Author: | DockLazy [ Mon Mar 25, 2024 10:47 pm ] |
Post subject: | Re: Getting it working. |
You could try bodging in some termination resistors as a temporary fix. |
Author: | oldben [ Tue Mar 26, 2024 6:52 am ] |
Post subject: | Re: Getting it working. |
Tried that, still not working. |
Author: | oldben [ Wed Mar 27, 2024 6:54 am ] |
Post subject: | Re: Getting it working. |
May have big design problems, the newer version of chips that I use, have v low max .6 volts for input. The old chips that have layout problems have V low of .8 volts for input. |
Author: | oldben [ Thu Apr 04, 2024 7:19 am ] |
Post subject: | Re: Getting it working. |
Got in some parts, so now I can try adding some rc flitering on the clock lines. Still waiting for some schotty diodes, how ever. |
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