Instruction manual

Then, use bload to place the putsys.bin file into memory at location 0x0800:

Now, run the putsys program at 0x0800. The drive activity light will light briefly – we are writing

many fewer sectors than we wrote with the format program. Now, CP/M will be present on the disk

system tracks.

Installing the CP/M loader

The final piece of the puzzle is to place the cpm_loader program into sector 0 of the hard disk. This

program is similar to the putsys program, but acts in reverse; that is, it gets the CP/M system from the

disk and places it into memory. Since it is designed to run before the CBIOS is in memory, it uses parts

of the CBIOS disk read routines, combined with ROM monitor subroutines, to get the code from the

disk. When it is finished copying CP/M into memory, it switches the memory configuration to all-RAM

with an OUT (1),A instruction, then jumps to CP/M.