On the topic, years back when I used a Mac constantly I considered some kind of hack that would patch the main GDevice to be 1/2/4-bit, then in a vertical retrace task remap it to the video card's 8-bit buffer every frame behind the OS's back. Since you usually run those old games at 640x480 or...
I had an Extended Keyboard II like this and I found some green corrosion in the switch itself. I tried cleaning the switch but ended up switching it with a good one from a junk keyboard of the same model.
ADB does use a separate line for the power key, so if that line isn't connected well the keyboard could still work normally and have no problems, and even the power key properly bring up the "Shutdown?" dialog once the machine is booted. Does the power key work reliably once the machine is booted?
Gauge Pro 1.1 is the one I had saved and used most often to monitor my Sonnet card. I only have Sheepshaver (emulator) running at the moment so I can't fire it up to see whether it had a way to disable speculative execution as I remember.
I use a Sonnet 400MHz G3 card in my 8500 and there is some mention of an option to disable speculative I/O because some things conflict (the Sonnet has an NVRAM patch to work around ROM incompatibility). I seem to remember either their CPU control app or one of the other card's allowing...
There's a thread for the PM8500 video hack (and a TwinTurbo 128 hack as well). At the end I posted updated links to the drivers. Both have apps for entering custom resolutions.
I've started using my iBook G3 800 MHz 12.1" to run Mac OS 9.2.2 on and was frustrated that it didn't support 1920x1080 on an external VGA monitor. I've installed the screen spanning hack to allow non-mirrored external displays, but it still didn't have the resolution I wanted, so I hacked the...
I can't commit to putting lots of time into this. I can look into an extension or whatever for possible tables, but doing ROM hacking in't something I have time for.
Hmmm, even if there is no extension with the driver, it still could be possible to patch the driver in memory. So the process might be an extension that finds it in memory, patches it, then changes the resolution to a patched one. The apps posted here do that so you can test without restarting...
No, unfortunately I don't have much hardware tools beyond a digital multimeter and anything custom I make on a breadboard.
Using a ROM might be too difficult. Regardless, the idea is to find the resolution values together, which is likely a table. If there are other values inbetween, those...
Maybe. It depends on whether the resolutions are hard-coded into its driver ROM, or are in an extension that can be modified. For the built-in driver for the PM8500, I had to figure out which values affected the video parameters. Here you might just need to find what sets the dot clock so you...
I've made progress on this. I found that the Delta power supplies used in the PM 8500 do in fact have a fan speed controller. The fan's + is connected to +12V, but its ground doesn't go to ground. I also found the thermistor nearby (lower resistance = higher temperature). I connected two wires...
My PM 8500 has been driving me nuts for many years now. Occasionally when the room temperature/CPU load is just right, the fan will start to whistle at around 532 Hz (slightly above a C5 note).
Often it occurs when I'm holding the mouse button selecting something, and then goes away when I...