Recent content by Nixontheknight

I'm ok with the risks as long as it gets my MDD working

The logic board is a 1.25GHz board so it's going to be 167, and the 1GHz card is 133MHz bus

Will you be selling this or will you provide the files to make the PCB?

I'm gonna try changing the bus speed on the 1GHz card

The PSU is known good, I have not done a PRAM reset but I believe the bus clocks are different from the card to the motherboard, and that's probably what's tripping it up

I turned it on with a 1GHz CPU card and the light just flashes and fades away, then it's silent, then the fans ramp all the way up

A few months ago, I was trying to overclock my MDD (rev A from 2002) from 1.25GHz to 1.5GHz, so I could get DiscordPPC to run properly, but I accidentally overvolted the CPU card and killed the logic board. Can this logic board be saved or should I just buy a working one?

the 040 LCs don't need more oomph. Byte Knight (the sysop of CQII) put an LC 475 logic board inside an LC III, and it has worked with the LC III's power supply

AFAIK, the power supplies from all pizza box LC machines are interchangeable. I have an LC III that has a power supply that has the same model number as the power supply of an LC II

yeah, it would be nice to make Microdrives for all the Macs that have extra pads for a ROM or an extra ROM slot

As i was looking at my LC III today, I found out there’s some unused pads for a ROM of an unknown capacity, then I remembered the rominator ii and Macintosh classic which both had bootable systems in rom that were accessed by pressing or holding keys on startup. Would that be possible to make on...

as I said, try seeing if the traces that go to those chips are interrupted somewhere, like they're cut, corroded, etc.

The modem port is probably geoport. And as for the memory, I’d tone out the connections for the RAM using a multimeter in continuity mode/diode check

it's common for ribbon cables in laptops to break, so I would say replace the ribbon cable going from the logic board to the display

I have a 1.25GHz MDD dual CPU card from a rev a MDD from 2002 that I blew up due to over voltage. Does anyone have any spare 7455s or 7457s I can use to put on the card? Thanks in advance