Exploring the possibilities and limitations of SCC68070 + SCC66470 tandem
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66470-registers.txtplain - 5.04 kB - 07/31/2019 at 08:16 |
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68070-registers.txtplain - 8.43 kB - 07/31/2019 at 08:16 |
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scc66470_ph.pdfAdobe Portable Document Format - 2.56 MB - 07/31/2019 at 08:11 |
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scc68070_ph.pdfAdobe Portable Document Format - 6.94 MB - 07/31/2019 at 08:10 |
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Hi,
thanks for posting those datasheets. Im trying to reverse engineer some software for a logic analyzer i got a while back (like, 15 years ago) and finally got the courage to tackle my project.
if your still plan on doing something with em. but need some inspirational schematics https://bama.edebris.com/manuals/philips/pm3585/ is where i finally found the schematics for my analyzer and it turned out it uses a "68070 microprocessor (D102)" and "At Power-On the 68070 is reset by the Video and System Controller SCC66470 (D105)."
Altho the buildin monitor is grayscale (uses a Hsync, Vsync and intensity signal) the vga port is somewhat it color :D so, not as fancy as the CDi players, definitely color.
I havent found the roms dumped yet, but if unsourcable, i plan on dumping mine. (as the main software seems to make calls outside itself, kernel/bios maybe? definitely there is software displaying messages and seeking the floppy disk drive)
CodeAsm (Nico)
Hi,
A really nice find. I did not know this particular Logic analyzer is powered by 68070+66470, but if one think a bit, 68070 was a Philips thing, so it's like obvious ;)
Definitely those schematics will be inspirational. Thx
Unfortunately, there is only limited documentation for the 68070 and 66470. This appears to be a fail (technical and/or marketing).
Hi,
I have 2 prototype boards with SCC66470 and maybe a sample of SCC68070 with unknow software in eproms.
Photo: http://marc.retronik.fr/motorola/68K/Photos/SCC68070_SCC66470.jpg
If you are interested in these boards, they are available for a swap.
Marc
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Hi,
I also have a PM3585 and would be interested in understanding if there is a possibility of having a disassembled version of the system software with indications of the memory mapping.
I'm having some trouble entering the date correctly. (probable millennium bug)
I would be grateful if you would keep me informed of any news.
Thank you