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UC386 (PDOS) vlog https://forum.osdev.org/viewtopic.php?f=2&t=56824 |
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Author: | kerravon [ Mon Apr 17, 2023 3:02 pm ] |
Post subject: | UC386 (PDOS) vlog |
Yesterday I got two important things working on PDOS/386. 1. The infrastructure is good enough to do the BIOS call to retrieve memory above 64 MB, which uses 32-bit registers, something I didn't expect in the original design. 2. Serial port is now working on real hardware for receive as well as send. So I am now going to cut a new distribution and use a laptop with a serial port and I will use just the internal hard disk instead of effectively cheating with USB HDDs where in 1980s terms I would have had to take the HDD out of the machine and into someone else's in order to transfer data. And I am only going to allow public domain material onto the laptop (basically UC386). And I am going to start with a floppy disk image on a CDROM. As far as I know, everything is in place. I will be able to write code on my public domain machine, but if I want to write outside of the limits of SubC I will need to pay a price by transferring to the full PDOS/386 to get it compiled "remotely". I am videoing what I am up to near the end of http://pdos.org Interestingly I hit a 2 GB limit - so much for everything being 64-bit, when I tried to upload my nearly 4 GB video. So the second video needs to be reassembled (with copy /b or equivalent). BFN. Paul. |
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