DF32x4 questions; software needed

My "DF32x4" disk emulator is alive and talking to my 8/L and appears to be reading and writing blocks of data correctly. There are a few instructions that I did not implement (e.g. the "Maintenance" IOT's 6631-4 which the manual says are only used in "diagnostic programming". Also the DCEA instruction does not clear the extended address and EA registers - it would have taken quite a bit more logic to implement and there was no more room on the PC board; additionally the DEAL instruction would be used anyway, which combines the clear action with a load of these registers from the AC - so the clear would be superfluous. The DEAL and DEAC load/read register commands are, of course, implemented). Ethan Dicks has pointed out that I should look at the drivers in OS8 and TSS8 to see if this will be a compatibility problem (i.e. they may expect to be able to clear EMA and EA for some reason, rather than loading them from the AC). Can anyone tell me where to find the source code so I can verify this? Also, I would love to have a paper tape copy of 4K Disk System Builder to start a build of Disk Monitor from scratch (I already have a copy of a DF32 build thanks to David Gesswein). Anyone? thanks Charles