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author | Chris Piazza <cpiazza@FreeBSD.org> | 1999-08-28 16:50:32 +0000 |
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committer | Chris Piazza <cpiazza@FreeBSD.org> | 1999-08-28 16:50:32 +0000 |
commit | 881196a841c8518d1e6ba288113bf765f290f4e7 (patch) | |
tree | e169aa11e3b217d28c1c099c1857591ffa416bb4 /emulators/cpmemu/pkg-descr | |
parent | e1a019e5eda00fc8822f16ae66a65cbe35adff2f (diff) | |
download | ports-881196a841c8518d1e6ba288113bf765f290f4e7.tar.gz ports-881196a841c8518d1e6ba288113bf765f290f4e7.zip |
Notes
Diffstat (limited to 'emulators/cpmemu/pkg-descr')
-rw-r--r-- | emulators/cpmemu/pkg-descr | 101 |
1 files changed, 1 insertions, 100 deletions
diff --git a/emulators/cpmemu/pkg-descr b/emulators/cpmemu/pkg-descr index a29c9aaca028..63eea9037104 100644 --- a/emulators/cpmemu/pkg-descr +++ b/emulators/cpmemu/pkg-descr @@ -1,106 +1,7 @@ -% -% Time-stamp: <06/06/94 23:08:26 Michael Bischoff moulder> -% -% CP/M emulator README -% - -Introduction: -============= +A CPM emulator. Type 'UNIX' at the CCP prompt to leave the emulator. (Or ctrl-@, followed by 'q' any time the keyboard is polled) - WARNING! This software runs only on 386 compatible processors and systems which allow nonaligned word/dword memory access. - -WARNING! This software has no documentation. If you want to use it, you're -probably a Real Programmer; and Real Programmers don't read documentation. - -WARNING! This software is supplied AS IS. There is No Warranty! - -The software emulates an Intel 8080 CPU (quite accurate, -except for the halfcarry flag for a couple of instructions) -and a lot of Zilog Z80 instructions (not the complete set). -Unimplemented instructions are input/output commands (IN A,(nn); OUT (nn),A; - INI, OUTI, INIR, OTIR, IND, OUTD, INDR, OTDR, IN C,(r), OUT r,(C)), and -interrupt mode commands (IM 0, IM 1, IM 2, RETN, RETI), and the refresh -register doesn't count at all. - -A 486DX2-66 emulates a Z80 clocked at 22 MHz, a 386DX-33 simulates a 6MHz -Z80. (approximately) - - -The BDOS emulator does only provide -- user 0 -- a single drive (A:) -- access to lowercase-files. - -A CCP-lookalike command interpreter is provided and the BDOS -is emulated. The CCP is stored in the file /usr/local/lib/cpm/cpm.sys. -Any CP/M .COM-files may also go in the directory /usr/local/lib/cpm. - -If you have an original CP/M, with CCP-address e800, BDOS-address f006, -and put it in the file /usr/local/lib/cpm/cpm.sys, you can have an -emulator quite near to the original thing, using the -e option. -The -e option tells the emulator to use the BDOS from cpm.sys, -instead of catching the BDOS-calls. -Pros: -- a real CP/M running -- access to CP/M-formatted floppies (you have to set the DPB correctly) - Try "cpm -e -i /dev/fd1" with a 800 KB CP/M floppy in B: - (bls = 2K, drm = 255) - after setting setfdprm -p /dev/fd1 800/1200 or the like. - -Cons: -- no access to the Linux filesystem - - -About the emulator: -=================== - -Type "cpm -h" for a short usage message. -You can interrupt the emulator by typing ctrl-@. This will enter -the debug mode, where you can disassemble z80 memory, dump memory, -edit data, set listpoints, breakpoints, set counts for breakpoints -and the like. Type '?' for a short summary. - - -extensions: -BDOS: - there is a new BDOS function (41), "change directory" - and a CP/M program CD.COM which calls this function. - -CCP: - ERA understands the /Q option (question!) - Example: ERA *.*/Q - TYPE understands the /W option (wait!) - Example: TYPE TEST.TXT/W - You can access files from other user numbers (image mode only) - Example: ERA *.BAS/2 - - Again: Type UNIX to leave the Emulator. - - - -TODO: -===== -- Improve the emulation of BDOS -- Allow multiple drives (some as CP/M filesystem images?) -- implement interrupt modes / signal catching to simulate NMI, INT -- improve the accuracy of the emulator (but; after all, a Z80 isn't - 8080-compatible as well; the sequence - XOR A - DEC A - JP PO,Z80_installed - /* an 8080, if we are here */ - will find out... -- merge the code with xtrs-80, to play GALAXY again! - - -BUGS: -===== - -Surely there are LOTS of bugs. Please send fixes to mbi@mo.math.nat.tu-bs.de -Bug reports (without fixes) are also accepted, but it would be nice if you -could track down the bad opcode. |