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That's exactly why I prefer to work on such things using FPGAs. Trying to squeeze x parallel and in sync working processes onto n cores is not trivial and not straight forward. Those FPGAs sure have their own limitations, and developing for them isn't trivial. But especially these massively...

Stretching means that the beam runs faster over the stretched area. And that in turn means that less electrons hit the stretched area. The reduced brightness in that area may just be caused by the stretching.

Memory access on the early Macs only runs at 2MHz, with the CPU using every second memory cycle and the unused one of the video cycle during blanking. Audio and floppy PWM also get one per display line during blanking. But the chipset must also have used some for memory refresh. I don't know...

Yes, it's the NanoMac. It runs at exactly the correct speed. One thing I am still missing is the exact memory cycles available to the CPU during the video slot. But that should only result in a minor error. And yes,.I can just create the necessary 1mhz clock. If the rest of the scc is...

Thanks. That was hopefully the missing info. I still wonder why I did not scope any outgoing data at all since my FPGA IMHO should just have used the standard clock source instead. But adding the extra 1mhz clock should be quite simple.

I would like to play MIDI from my (FPGA) MacPlus. I was expecting that Cubase can simply send and receive MIDI through the SCC/modem serial port as the SCC is definitely able to send and receive at 31250 bit/s. But Cubase only offers me 500k/1M and 2Mbit. This suggests that there's more hardware...

Latest feature: Wi-Fi redirected to the Mac's modem serial port. See https://68kmla.org/bb/index.php?threads/new-mac-bbs-captains-quarters-ii.37877/page-5#post-567604 Next will be the option to route serial to the physical MIDI that some of our boards have. That should allow Cubase to...

The latest release includes SCSI support and is e.g. able to use the MacPack. The result actually becomes pretty entertaining, as this now boots directly into OS 7.5 and basically allows you to just run any of the classic games that were released for the Mac Plus. I was e.g. very surprised to...

Major parts of the iwm already exist inside the PlusToo core. And like on the Amiga, major parts of the encoding/decoding are done in software. I actually don't expect it to be too much work to add the missing parts to an extent that a physical floppy disk can be read. It might even be possible...

Replacing a switching regulator with a linear regulator is usually not a good idea. You need to know what current and what voltage drop to expect. And from that you get the expected power dissipation on the linear regulator which in turn tells you if that's feasible at all. What's the input...

Small update: The NanoMac v1.0 now properly supports floppy disk writing. As a result, it's actually pretty usable as a Mac Plus with up to 4MB RAM and two floppy drives. There are plenty of options for the hardware. This e.g. is a board with separate Pi Pico and a built-in USB hub. The MIDI...

Very cute. But where does it mention injection molding?

That filament is great. Add one of those 4inch mini crts from Ali and build a mini plus with a real CRT ...

Some of these screen overlays were meant to protect the users skin. The CRTs front would slightly charge up by the electron beam and dust touching the screen would pick up the same charge and then be pushed away. Some people claimed that this slight but permanent stream of dust particles would...

Thanks a lot. That's a bunch of helpful information. The finder gave me the option to install a mini finder. I'll try that and remove the full blown finder. And I should play with resedit it seems ... Thanks again. We'll see if the NanoMac will find it's users just like the Atari ST and Amiga...

What I just found is Retro68k. It builds, and I can compile the "Hello World" demo, which in turn fits (very tightly) onto a minimal system30 800k disk image. I can then set the Hello World as Startup and tadaaa ... the disk boots directly into this hello world. With a little luck, I might be...

After ten years, I have started to spend some time again on the PlusToo FPGA Mac Plus. This is now based on the Tang Nano 20k family and allows for a quite small and also somewhat cheap setup. This time I am trying to do this as close to the original as possible. And e.g. Speedometer already...

Speaking of CRTs: Are there small, cheap CRT replacements for the classic macs? Has anyone e.g. ever tried to see if these 4 inch CRT's can be made to accept the 22kHz signal of classic Macs? Wouldn't it be great to combine that with such a tiny FPGA replica?

The arrival of cheap FPGAs from the far east has sparked my interest in those retro FPGA implementations again. After having done an Atari ST and an Amiga, I have decided to give the Mac Plus / PlusToo some attention. This time I'll try to focus on accuracy. The memory timing is already back...

MD5 sum is 8a41e0754ffd1bb00d8183875c55164c, so this is a "MacPlus v3 ROM".