COMMODORE/KAYPRO COMPATIBILITY by Toby Prim, Las Vegas KUG, July 1987 (CP/M compatibility between Kaypro and Commodore.) Here is some information I've collected about how the Commodore- 128 using CP/M can use Kaypro formatted disks. I hope it helps members and prospective members who started with a Commodore-128 and now have Kaypros, etc. The Commodore-128 will default to the 128-mode when powered up. The Commodore CP/M disk must be loaded. On a color monitor, the CP/M text is displayed in purple. The Commodore-157 "smart" disk will handle only double density (MFM) formats. When a CP/M disk is inserted in the drive and accessed, the drive will determine its format and display it in a box in the lower left hand corner of the screen. The drive can sense only six (6) formats. RETURN must be typed to enter this format and the disk accessed again to read or write. If the format is known, the display in the box can be scrolled by using the left and right arrow keys before being selected by the RETURN key. The disk drive will go through this selection process every time the disk is accessed unless the format is locked in by typing CONTROL/RETURN instead of RETURN. The formats recognized by the Disk Drive are: EPSON QX10 (double sided, 10 sectors per track) IBM-8 (CP/M-86) (both single and double sided, 8 sectors per track) KAYPRO II/IV (both single and double sided, 10 sectors per track) OSBORNE DD (single sided, 5 sectors per track) The Commodore appears to run generic CP/M but has problems when the program gets I/O specific, such as "output to 40H" instead of "output to printer".