Iesca
Well-known member
Hello!
I've recently acquired a Macintosh II that was upgraded with a Dove MaraThon 030 and fitted with (what I believe is) a Macintosh Display Card 4•8 (empty VRAM slots, Apple Part #: 630-0400), all in a IIfx case. It had two full banks of RAM, but I have no idea what values they are, so I've ordered some (80ns) 256k sticks to put in bank A just for testing purposes. I've also ordered a standard 16MHz 68020 processor, again, just for testing purposes. It does not appear to have had the 68551 PMMU upgrade; I don't know about the FDHD upgrade as yet.
I've replaced the batteries with new Saft 1/2 AAs (battery holder STL courtesy of Bruce Rayne!) and was able to power it on, but other than the fan in the PSU and a small blip from the hard drive (probably a self-test), I do not get any chime or video, though the LED is lit. Additionally, the PSU seems to be a little intermittent (but it stays on once it gets going). If I insert a System Disk when powering on, there is no floppy disk activity.
I plan on replacing the capacitors in the PSU, but it does seem to work for the most part for now. My understanding with regards to the 4•8 card is that it does not work with a VGA monitor, which is what I have currently, using a DB15-to-VGA adapter (dipswitch-less, but it works fine with other machines like my LCIII). But even then, I would have at least expected a chime, although the Mac II Service Source does have a page describing my symptoms ("Symptom Charts/Video" page 7, PDF page 20) as potentially being a monitor issue. And, as can be seen in the photo, there are no electrolytic caps to worry about (apart from some axials, which rarely have issues).
I do not have an Apple CRT monitor, sadly. It would seem that the Apple High Resolution RGB 13" Monitor would be compatible, though I know it is possible for the 4•8 to output higher resolutions to (non-multisync) monitors.
If anyone has any pointers on where to go from here, I'd be in your debt.
And if anyone in the Los Angeles area would like to trade a compatible (and working) Apple CRT for an Apple Cinema Display 22" ADC with DVI adapter, please let me know! Especially if you're near Glendale or Pasadena (I'm in northeast LA).
(Photo of logic board with MaraThon 030 removed.)
I've recently acquired a Macintosh II that was upgraded with a Dove MaraThon 030 and fitted with (what I believe is) a Macintosh Display Card 4•8 (empty VRAM slots, Apple Part #: 630-0400), all in a IIfx case. It had two full banks of RAM, but I have no idea what values they are, so I've ordered some (80ns) 256k sticks to put in bank A just for testing purposes. I've also ordered a standard 16MHz 68020 processor, again, just for testing purposes. It does not appear to have had the 68551 PMMU upgrade; I don't know about the FDHD upgrade as yet.
I've replaced the batteries with new Saft 1/2 AAs (battery holder STL courtesy of Bruce Rayne!) and was able to power it on, but other than the fan in the PSU and a small blip from the hard drive (probably a self-test), I do not get any chime or video, though the LED is lit. Additionally, the PSU seems to be a little intermittent (but it stays on once it gets going). If I insert a System Disk when powering on, there is no floppy disk activity.
I plan on replacing the capacitors in the PSU, but it does seem to work for the most part for now. My understanding with regards to the 4•8 card is that it does not work with a VGA monitor, which is what I have currently, using a DB15-to-VGA adapter (dipswitch-less, but it works fine with other machines like my LCIII). But even then, I would have at least expected a chime, although the Mac II Service Source does have a page describing my symptoms ("Symptom Charts/Video" page 7, PDF page 20) as potentially being a monitor issue. And, as can be seen in the photo, there are no electrolytic caps to worry about (apart from some axials, which rarely have issues).
I do not have an Apple CRT monitor, sadly. It would seem that the Apple High Resolution RGB 13" Monitor would be compatible, though I know it is possible for the 4•8 to output higher resolutions to (non-multisync) monitors.
If anyone has any pointers on where to go from here, I'd be in your debt.
And if anyone in the Los Angeles area would like to trade a compatible (and working) Apple CRT for an Apple Cinema Display 22" ADC with DVI adapter, please let me know! Especially if you're near Glendale or Pasadena (I'm in northeast LA).
(Photo of logic board with MaraThon 030 removed.)
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