Xref: utzoo misc.wanted:11810 comp.sys.misc:3060 comp.os.cpm:4252 alt.folklore.computers:6517 Path: utzoo!attcan!uunet!zaphod.mps.ohio-state.edu!usc!rutgers!njin!uupsi!grebyn!bob From: bob@grebyn.com (Robert A. Baumann) Newsgroups: misc.wanted,comp.sys.misc,comp.os.cpm,alt.folklore.computers Subject: Re: Joan Riff and Z80M Summary: Z80MU *DOES* support DMA setting in CP/M Message-ID: <22875@grebyn.com> Date: 29 Oct 90 02:57:06 GMT References: <6435@plains.NoDak.edu> <1990Oct24.233232.11580@mthvax.cs.miami.edu> Followup-To: misc.wanted,comp.sys.misc,comp.os.cpm,comp.sys.ibm.pc Distribution: na Organization: Grebyn Timesharing, Vienna, VA Lines: 42 In article <1990Oct24.233232.11580@mthvax.cs.miami.edu>, max@mthvax.cs.miami.edu (Max Southall) writes: > Not liking Joan's attitude as a reason for using and not paying for her > CP/M and Z80 emulation package sounds like a rather convenient > justification for taking advantage and saving bucks. If you feel you can't > use her stuff in good conscience, don't use it at all. That's like saying > it's OK to rob banks because some of them invest in South Africa! Sheesh. > > References: <1990Oct19.204926.17576@techbook.com> <6435@plains.NoDak.edu> Er... This is a fascinating discussion. What's intriguing to me is that Z80MU *DOES* support the "set DMA" call perfectly well! Furthermore, every assembler and compiler and loader that we've come across works perfectly well under Z80MU. At least, they work perfectly well under LEGITIMATE copies of Z80MU. Is it possible that somebody is using a corrupted copy of Z80MU? That's the only logical explanation that I can think of. We have seen quite a few corrupted copies out there. Who knows how or why it happens, but that's the breaks of Electronic Distribution. Once you let it out, you can't control what happens to it. I'm setting the record straight because I own Z80MU. Not a copy of it. The *REAL* Z80MU that Joan Riff wrote for me 4 years ago and that I rewrote myself. That's how I know that a *REAL* copy supports CP/M 2.2 perfectly well, even down to redirecting hardware I/O port addresses to 16-bit IBM PC port addresses for you fanatics who *REALLY* want to run a CP/M version of KERMIT or whatever. Drop me a line. I'll be glad to help to identify legitimate copies of Z80MU 3.10 (the last public domain version) and Z80MU 5.2b (the current, commercial version). There are thousands of folks running *LOTS* of off-the-wall CP/M software with Z80MU, and just about everything works perfectly well for them. Gosh, maybe there *ARE* benefits to buying a legitimate copy... Bob Baumann Computerwise Consulting Services P.O. Box 813, McLean, VA 22101 (703) 450-7175