RGF@mit-mc@sri-unix.UUCP (09/08/83)
From: Ronald G. Fowler <RGF@mit-mc> Date: 7 September 1983 23:17 EDT From: Ronald G. Fowler <RGF> To: ALBERS at NLM-MCS cc: RGF Re: CP/M+(3.0) software CP/M 3.0 will indeed work with the old software with the following disclaimer: direct BIOS I/O calls are supported only for console and list I/O. Programs accessing the physical disk routines (e.g., DU, FINDBAD, and a very few others) must be modified to use the new system call, "call-BIOS". Surprisingly, even BYE.COM (the remote console program for CP/M 1.4 and 2.2) works with my banked CPM3, something I had my doubts about at first, since it patches itself into the BIOS jump table.