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128K with -A ROMs and OA-D34V-22 floppy

decle

Member
The prevailing wisdom seems to be that the Mac 128K with 64K -A ROMs (342-0220-A and 342-0221-A) cannot be used with the 400K OA-D34V-22 floppy drive. For example:



However, I don't believe this is correct as can be seen here (apologies for the strobing video, the camera on my phone does not like the Mac video refresh rate):


What I have found is that my D34V-22 seems to be very sensitive to electrical noise. It's not possible to run it successfully without the caddie, which makes sorting out issues more challenging. However, once it's wrapped in its aluminium blanket it seems to be willing to play ball with the -A ROMs in my 128K, and System 2.0 appears to boot reliably.
 
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ricogonzo

Member
I have a similar setup. My mac is a 512k with manufacturer date of 2nd week of July 84. My floppy is also a D34V-22 and is also sensitive to noise and only works with aluminum shield. The serial number on my drive is 943452 which is close to yours. AND, I also have Version A ROMs. I did notice in video that your IWM chip is Version A and mine is Version B. Do you know what month yours was manufactured? I have read so much about the incompatibility with Version A ROMs and this drive and yet mine works flawlessly everytime.
 
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