@ AmigaDave
I've read that the CDTV and the A570 coupled with an A500 were virtually the same. I had great dreams of expanding my A570 system. It works well with Supra's RX500 fast ram expansion and with 2 megs of chip on the 500 motherboard. It also works great with SCSI-TV by Amitrix Development (the same SCSI interface add-on for the CDTV).
I could never get it to work reliably with any accelerator. I tried mTec's 020, ICD's Adspeed, and Supra's Turbo 28Mhz. The Addspeed appeared to work for a week but then destroyed the A570. Commodore replaced it under warranty. When the second A570 began displaying the same symptoms, I popped the Addspeed out. It seems that the special CD interface and rom are sensitive to CPU timing signals.
If you try the MegaMidget, be cautious.
