Creating new CP/M disk from scratch

Hi Richard I think I'm missing something here. The versafloppy controller will not blindly boot a disk. You need some firmware to get things started. I can tell you how I did it but only parts are relavent. 1. Write a serial to memory transfer. This can be done in about 50 bytes for chips like the 8250 that needs initialization and about 10 to 15 for the older part that don't need software initialization. 2. Write a disk formatter. This isn't neccissary if you want to use something that can be done from the PC but remember, many PC's can't do FM. THe versafloppy is FM. 3. Write a routine that can transfer an image in RAM to sectors on the disk. 4. Create your BIOS, use routines in ROM and put this to the disk using #1 and #2 5. Load the rest of CPM2.2 the same way. I've done it this way except that my machine had a controller that did DMA and would auto load sector 0 into RAM on reset. It has no ROMs in the system space. Your versafloppy will need firmware. Dwight