IDFS 1.50
*BYE ends the session.
I have successfully created a version of ADFS which looks at devices on the Master internal bus. As it's derived from ADFS, all the write operations work.
In fact, minimal changes were needed to make this "internal ADFS". The source code is well commented, so it wasn't all that difficult.
The main change is to alter the hardware address that the filing system looks for as a hard drive, from &FC40 for ADFS to &FE80 which is where the internal SCSI interface lives.
I made other changes to keep it compatible with VFS, keeping filing system number 10 and keeping the file handling number range.
Some additional code was required to invert bytes read from the SCSI interface, which VFS does but ADFS doesn't do. This made the ROM exceed 16K, so I had to delete the floppy drive access code. This doesn't matter, because it would have been confusing and needed more work to figure out the drive number because the SCSI interface supports all 8 SCSI IDs, so numbers normally meaning floppy drives in ADFS (4 to 7) are hard drives in VFS.
As a result of this, there is good amount of space inside IDFS which could possibly be used to put back some of the VFS laserdisc player control commands.
