Recent content by SuperSVGA

If it's the entire LCD it seems like it could be the VCOM voltage or something. One thing you could check is taking a look at the voltage both when the display looks fine and when it is "normal" and then after it goes all black. There should be the "VC BAR" and "GND BAR" that you can measure...

Unused inputs should be connected to VCC or GND to keep them from floating at undefined values, outputs can be left floating.

Most of the card's signals would be connected directly to the PDS slot, except for write protect and card detect. The rest of the functionality (i.e. functions not on the card itself) would need additional logic to present the registers to the system, including: Adapter is present Separate...

Based on the images and the patent drawings, it doesn't seem like those readers had any extra logic, unless it was hiding on top of the PDS connector. For something compatible with the ROMs that were shipped, there would have to be extra registers (logic that handles the state of both readers...

It wouldn't be that hard to make them work (most of the effort would just be putting the physical part together). The trickier part is if you want to make them just like the original ones, since it's not clear if Apple ever even truly figured out what that would look like. Since we already have...

I'm thinking that adaptor was probably pre ROM freeze, as the design probably changed. There's supposed to be registers for eject, write protect, read only, and card inserted that's not possible when just connecting the cards directly. Aside from those, all the other signals needed for the cards...

The specs on that design seemed shockingly low (512KB of RAM?) so my theory was that it was possibly this prototype design shown in a 1995 issue of MacWorld: It does make sense looking at what signals are available on the connector. My guess is it cuts off before A19/A20/A21, possibly...

You could probably get by with leaving some out, but it depends on how much current you are drawing. Ideally each +5V should have a GND for current return, and then the signal lines can usually share grounds. It would probably still work with just one ground as long as there's not too much...

I believe in 6.0.8 you go to the Apple menu in the top left, Control Panel, and then the volume control I think is in both the General section and the Sound section, so you can adjust it from either location.

Do you mean in addition to the volume control in the control panel, or is that one not working?

It's basically a floppy emulator using a ST or Artery microcontroller. There isn't much else to them hardware wise. Commonly used for replacing floppy drives in pretty much anything that uses an IBM/Shugart interface or variations.

I'm not entirely sure about compatibility with all standard PC drives, I haven't done much testing there. I've heard others have tried standard PC drives, some worked and some didn't. I don't really have enough variety of 3.5" drives around to test it. Floppy emulators work with 1.44MB MFM disk...

You still need the Outbound floppy controller board, since that's where the floppy controller chips live. But it works with both the internal and external floppy boards.

They're only for providing the original LCD panel the signals it needs, the external output leaves those signals out and expects whatever device is on the other end to get by with the bare minimum of just the byte clock and frame clock, which technically the other two clocks could be derived...

I think I'm just going to throw together an adapter to use an optical mouse for the VCF display. Probably more reliable than the ball mouse at least.