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Getting it working.
http://anycpu.org/forum/viewtopic.php?f=23&t=1079		 Page 5 of 5
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.

Attachments:
mio.2.jpg
mio.2.jpg [ 37.76 KiB | Viewed 3408 times ]
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.

Attachments:
File comment: 5 bit slices and 2 connectors so far
nalu.jpg
nalu.jpg [ 49.18 KiB | Viewed 3377 times ]
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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