HELLER@cs.umass.EDU (Stride 440 User) (04/26/88)
Bill: There is a PD CP/M 2.2 emulator that runs under CP/M-68K. It is on Simtel20.ARPA as COM.LBR PD1:<CPM.CPM68K>. The .LBR file is a LU310 compatable library file and contains squeezed (USQ210) sources files, in 68000 assembler. This emulator runs under CP/M-68K and has a "dummy" BIOS/BDOS, which just transfer control to the CP/M-68K BIOS/BDOS. Does not have a CCP - run one CP/M 2.2 program and returns to CP/M-68K's CCP (i.e. piggybacks on CP/M-68K's CCP). Under UNIX, I guess you'll have to write a "real" BIOS/BDOS which fake it and call UNIX system functions. This emulator is mainly an 8080 emulator - does not fully emulate the Z80, although hooks are there. Speed: about 1Mhz 8080 on a 10Mhz 68000. Simtel20.ARPA supports anonymous FTP on ARPANet. I don't know if this helps any. Robert
brian@attcan.UUCP (Brian Musker) (04/10/90)
Not too sure if my last message got out... (postnews did a core dump!) For the party interested in a cp/m emulator, i wrote an 8080 emulator in C, with a pseudo clock, tty, disk, and dma controller, and i ported cp/m 3.0 to this pseudo-machine. It runs every 8080 cp/m application i have tried so far, and it has run unchanged on both an 80386 and a WE32200 platform, so i suspect the code would work fine on a 68000 architecture. The three drawbacks to this piece of code are: 1/ Terminal i/o is fairly slow. I have tried a variety of buffering techniques, but few seem to have any useful impact. 2/ It really needs to support the Z80 ops. 3/ If i distribute it, i can only supply the sources for the emulator, and the cp/m bios drivers, i.e. you had better have a configurable cp/m on hand to link these drivers into. If you would like to get your hands on this code, or just want more data, please mail or post me... Brian Musker