Somebody better let this guy know there's interest: << Subject: Re: one cp/m uzer more in this world From: "Richard A. Leary" &lt;rleary(a)voicenet.com&gt; Date: 1998/06/07 Message-ID: &lt;357A2604.277DE058(a)voicenet.com&gt; Newsgroups: comp.os.cpm As the developer of DOS/65, I can say that there was and is a CP/M "port" for the 6502. It was not targeted at the STD bus but several OEMs did have a license to resell and they used STD bus. When I first created it, it was initially built on my S100 system with a Tarbell SD floppy controller and my home built wire wrapped 6502 CPU. While the floppy controller has changed and the CPU has been changed over the years, my S100 system still has a 6502 CPU in it. Actually I have that and a Godbout Z80. DOS/65 is not really a port since some things I never got around to (e.g., batch files) but otherwise it is pretty much there. Even includes a 6502 version of BASIC-E. Has an assembler, editor, small c, debugger, and much more. As far as disk access goes it will read and write CP/M disks without problem. For example, my S100 system has 8" SSSD, Kaypro II/IV, and 1.2 MB 5.25" floppies as well as a two partition hard disk. All drives are interchangeable between DOS/65 and CP/M. Price was actually pretty reasonable back when there was interest (early to mid 80s) at around $100. Versions were (and are) available for KIM, AIM65, OSI C1P, OSI C4P, S100, and other special configurations. At least one large AIM65 club had a group license. In this day and age, I've considered putting the software in some sort of shareware status but just have not had the time and was not sure there was any interest left. I still "play" with the software on occasion. If anyone is interested I would be glad to provide more info. Rich Leary Steven N. Hirsch wrote: