Easiest to obtain Mac Plus CPU upgrade

[Chopsticks]

Did you try the System Folder from the floppy copied onto the bluescsi? Guessing you did.

Accelerators change the timings of ROM routines, usually it is subsystems like floppy, sound and serial that play up. I haven't seen SCSI problems before, but I don't have a BlueSCSI. The accelerators' ROMs or drivers patch the system to correct the timing issues (but seem to struggle with sound!).

How were you powering the BlueSCSI? Have you done the termination power diode mod, or are you using external power? The SCSI on the Plus is wonky enough that some accelerators provide better, less broken, SCSI implementations.

What versions of the drivers do you have? Have you got GemStart 3.*? I saw the Extreme Systems logo briefly in your video. Generally GemStart 2 is for System 6, and 3 is for 7 and 7.0.1. 7.1 wasn't officially supported. I think the Extreme Systems version supports 7.1.

even on the SE/30 I have trouble with the bluescsi unless its externally powered. this behaviour does change slightly symptomwise depending on the firmware used. obviously overclocked fw wll draw more power on the bluescsi, however I think he mentioned in the video he tried stock fw.
also im not sure what version of bluescsi ActionRetro used and I haven't followed development of that project in a long time, however it should be noted that those pins on the STM bluepill certainly aren't rated for the sink current the scsi bus puts on each pin. they really should have some kind of bus transceivers....
that could be part of the issue though like you pointed out its not common for the scsi bus to get affected. like you id more see a floppy, sound or even a serial port issue... perhaps testing a few different scsi devices such as a mechanical drive, ZIP drive, scsi2sd etc could norrow down the scsi issues he had in that video

 

[68kPlus]

Confirmed to work in the SE... I'll have to dig out the Plus to test it in there as well.

View attachment 48293

Will you ever mass-manufacture these? I hate to ask like so many others do, but this is some seriously impressive work and it would be so cool to own one of these.

 

[Bolle]

Doh... of course it's not going to work that way. Works in the Plus just as expected now

 

[JC8080]

I have a Performer clone I built (thanks @Bolle) that works fine in my SE, and I recently installed it in my Plus. The machine works fine booting from my BlueSCSI v1.1 without the accelerator drivers installed, when I install the drivers (I have tried GemStart 2.2 and 3.0) the machine freezes as soon as I try to do anything (copy a file, open the control panel, etc.) Based on this experience along with the info in this thread, it sounds like maybe BlueSCSI is just not compatible with an accelerated plus. Does anyone have any idea if any of the other SCSI emulator solutions will work with an accelerated Plus? Floppy Emu also does not play nice with accelerators, so at the moment I don't have a way to use this machine accelerated. Unfortunately the floppy drive in this machine does not work, it probably needs at least a cleaning, and I have not had a chance to try that yet. I suspect it would work fine booting from a floppy with the drivers, but I cannot confirm at the moment. Does anyone know if the BlueSCSI v2 has the same compatibility issues?

The Plus has the diode mod and the BlueSCSI is powered off the SCSI bus. The BlueSCSI has the correct Plus .ini file in the root folder. I am running System 6.0.8. The analog board is freshly recapped, and with the accelerator installed and BlueSCSI hooked up I am seeing 5.2v and 12.7v, so I don't think there is an issue with low power.

Any help would be much appreciated!