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The Logitech with probably work. Tried with a Kensington Mouse and it didn't work. Turns out @tashtari found why, Kensington pointing devices are composite (long story short: they show up as two different devices on the bus) I need to implement a workaround for that, if possible. To double...

A 6200 is a 630 board with a PPC upgrade soldered in x100 series had 44khz/16 bit, as well as most others PPCs, so you are mostly right

Awesome, good job !

Not for me, but it may be interesting of other people show up. I wouldn't bother to open it if not needed as the plastic may break Thanks. Nice article! Unfortunately the chip on the patch panel doesn't seem to exist on ISA cards

It will not work, it's only for 128k/512k/Plus lisa for now. The ADB connector is for plugin an ADB mouse Yes they are. PM me if interested. The firmware is even upgraded from time to time to improve the bluetooth side. I try to keep a stash around. Not 100% sure if every ADB trackball is...

Always impressive, nice job ! Shooting ideas - I've had capacitance issue with some level shifters. They get noisy on all the bus, not sure you have some in there - weak pulldown on /STERM ? (like 10-47k ?). How low is the voltage going ? Maybe some EMI issue ? The IIsi developer notes states...

They are kinda rare, mostly used in classrooms back then. Wouldn't be too hard to reproduce tho if someone can draw the schematics

Doesn't it need a 74 series something chip as well to fix the chip select ?

Good old cat /dev/sda | netcat ?

Add like 10-100nF caps from TxD+ to GND (serial) and TxD- to GND (serial). Don't see why that wouldn't work, unless the PIC power consumption is > 1 mA

@joshc nice, good job ! It will fit nicely with your translucent SE/30 :)

@jmac they are not used much. The controller blink them after initialization and that's about it. IIRC, the one under Power is actually "Num lock" and the other one is "Scroll lock". Like on a real Mac, these LEDs are not very useful. You can make them blink with something like ADB Express...

@Phipli that was for me. Thanks again :) I ended up building a prototype with the schematics from MacGarden. It didn't work, but may be an error on my part (not working = not visible by software) Then someone provided me a real (working) one, and the schematics don't match, different ICs, PIN...

Nice, good job !

Yes, as most of the SCSI upgrades. Some board asked for Plus ROMs, others had patched 64k ROMs in other way or another. The Beck-Tech MacMEGABYTES used a second set of ROMs to patch the 64k ROMs

The 64k ROM assumes that the max RAM possible is 512. Since video and sound buffers are at the top of memory, this can't work The 68k ROM make the CPU writes at the top of 512kB of RAM, and your logic board video/sound circuit reads at the top of 1024kB of RAM

Missing keys, broken case mostly. Can you see your keyboard with ADBParser ? The three LEDs flashing the first time is a good sign. It means the controller is alive. The LED trick I've seen it fail with working keyboards, don't know why. I will go with either your matrix is fully dead, or it's...

That's the one !

I will switch to a few others projects for now, but maybe someone can take it from here !