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Yep, this is really what I'm hoping will be the most-performant route forward, but it will require use of an old Linux 2.6 kernel, which does contain MPC8xxx support. Current versions of Linux kernels do not support MoL at this time.

@tcole This is very much not a dumb question :) The default behavior of Classic Mac OS is to eject all optical drives at power-off. It seems it's not cycling to the second ISO, so it would be helpful if you could send us your zululog.txt, as well as a directory listing/screenshot of the ISO...

Power to the p Power to the optical sensor is being delivered, regardless of what is happening at the protocol level, so this isn't terribly surprising/unexpected.

@ScooberDiver You'll need to examine the contents of your zululog.txt file, which will likely shed light on what's going on there.

@ScooberDiver The Macintosh Toolbox ROM has a hard-coded assumption/requirement that every bootable SCSI device must have an Apple Partition Map. Since HFS floppies do not contain a partition map, and instead contain only the raw HFS filesystem information itself, you cannot use an unmodified...

Yes, the 2GB to 4GB era is when SDHC became standardized, but there was a period of years where not all cards were compliant. The SDHC card specification was released sixteen years ago, back in 2006. Both ZuluSCSI RP2040 and ZuluSCSI V1.1 use SDIO for communication with SD cards. All SCSI2SD...

Hi, this is not entirely correct. We definitely have 4GB SD cards that work fine with the ZuluSCSI RP2040. Most 4GB SD cards don't work with ZuluSCSI V1.1 either. The reason for this limitation is the silicon in the SDIO controller itself, which does not support SD cards that do not adhere to a...

Unless you've installed the diode that Apple chose to omit from the Mac Plus logic board, it must be powered externally via USB.

They're simply not available at any affordable price. Sure, if you want to pay twenty times what the CY8C5267 was historically worth, you can get them, but why?

We've received, programmed, and tested our first batch of our new 2.5" version of ZuluSCSI V1.1, suitable for internal use in any SCSI-equipped PowerBook machine, and they're available for purchase today via the above link. This version of the V1.1 board has user-configurable termination via...

Not hard, impossible. Building SCSI2SD V3/4/5 is impossible. CY8C5267's and ALL other parts in the family are unobtanium, thanks to the global component shortages.

Yes, you can do this via Basilisk on Windows as well. There are plenty of videos and tutorials online, if you Google it, but someone here may be able to provide a recommended link/guide.

It doesn't, it can't tell the difference. That's the whole point/goal. There won't be a "SCSI 1 icon" per se, the Macintosh will simply see a volume, and, assuming it's formatted and partitioned correctly, Finder will show the name of the volume on the desktop. Yes, but you have to know what...

It's not that it doesn't provide "enough" power. This is not an accurate representation of the situation. The Mac Plus simply does not provide any SCSI termination power, unless you add a diode to the location on the Mac Plus logic board where Apple chose to omit it, presumably out of an...

Ah ok, understood. Yep, that's the whole point of this endeavour....connectivity to the outside world without the need for external bridges.

The RP2040-based Pi Picos are not "Raspberry Pi" SBCs; They're $4 Cortex M0+ based microcontrollers. It's the Raspberry Pi's first microcontroller design. Pico = RP2040, which is a ~$1 microcontroller.

Ten megabits of through is likely not achievable, given the limitations of the serial hardware on the Mac side. I believe the faster serial is good for TWO megabits per second, if externally clocked. This was a "geoport" feature, so these speeds would likely be limited to Macs that shipped with...

These "universal" serial-only CommSlot PCBs just showed up today, and so far, we've only confirmed that they physically fit in both CommSlot I and CommSlot II sockets, which is a relief. It has footprints for an ESP8266-based Adafruit ESP-12F ($6.95), Raspberry Pi Pico or Pico W stamp...

Thanks, that's the assumption I was operating under, but it's nice to have it confirmed.

Good to know, thanks, @David Cook . Can you share any information on voltage levels/logic types for the serial pins? TTL? CMOS?