dougg3's latest activity
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Ddougg3 replied to the thread LC520 Overclock.Happy to help, it's a fun little puzzle. Here's a little mini deep dive further into it. I thought about it some more, and I think I...
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Ddougg3 replied to the thread LC520 Overclock.My assessment is that R80 only matters if you are using a ROM SIMM. It shouldn't matter for any kind of overclocking or conversion from...
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Ddougg3 replied to the thread LC520 Overclock.Yep, this is definitely the same circuit as the CC. I just beeped it out as best as I could on my 820-0368-A board from a caddy-loading...
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Ddougg3 replied to the thread LC520 Overclock.That pin (pin 2) on the ROM SIMM socket is VPP, which is 12V power for allowing EEPROM chips of the era to be reprogrammed in-system...
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Ddougg3 replied to the thread Testers Needed: Modified ROM for LC475/Q605.I'm glad you got something working, @JDW! I know I said I wouldn't derail the thread, but just wanted to add one more thing after your...
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Ddougg3 replied to the thread Testers Needed: Modified ROM for LC475/Q605.Uh oh! Unfortunately I don't have an actual machine running High Sierra to test against, but I can confirm that in my High Sierra VM it...