Hi AndyDiags,
I worked several years on my US version Model 1 without a functional interrupt. The only thing I was missing, was the CLOCK function. Especially the floppy access worked fine without having the interrupt capability.
From my US version ROM V1.3 I know that the NEWDOS80 V2.0, I am using, is accessing fixed addresses. As I only created WAV files from US versions of the operating systems, you might run into an incompatibility of the disk OS and the ROM content. Do you have a Japanese OS version that you can use for testing?
Regarding Bootstrap
The program is checking the content received via the cassette port. It is verifying each sector written to disk and it is verifying itself after finishing the creation of the floppy. It is very unlikely that an error might be missed on the path.
I worked several years on my US version Model 1 without a functional interrupt. The only thing I was missing, was the CLOCK function. Especially the floppy access worked fine without having the interrupt capability.
From my US version ROM V1.3 I know that the NEWDOS80 V2.0, I am using, is accessing fixed addresses. As I only created WAV files from US versions of the operating systems, you might run into an incompatibility of the disk OS and the ROM content. Do you have a Japanese OS version that you can use for testing?
Regarding Bootstrap
The program is checking the content received via the cassette port. It is verifying each sector written to disk and it is verifying itself after finishing the creation of the floppy. It is very unlikely that an error might be missed on the path.