Path: utzoo!mnetor!uunet!husc6!cmcl2!brl-adm!umd5!rutgers!ames!ucbcad!ucbvax!RAND-UNIX.ARPA!bridger%rcc From: bridger%rcc@RAND-UNIX.ARPA Newsgroups: comp.os.cpm Subject: Re: CP/M Plus, Banked ZRDOS, Z280 Message-ID: <8712141855.AA10189@newton.arpa> Date: 14 Dec 87 18:55:21 GMT References: <4290@ecsvax.UUCP> Sender: usenet@ucbvax.BERKELEY.EDU Organization: The ARPA Internet Lines: 38 1. Z280: Scott Moore at Zedux, 818-787-0113 voice, 818-787-0458 bbs has a Z280 board running with a multi-tasking OS he supplies with it. It supports multiple cp/m partitions, but not zcpr3. 2. Z3ON3 -- the port of ZCPR33 to CP/M 3 (CP/M PLUS) that is under development -- will provide essentially all ZCPR3 features on a CP/M 3 system, including: z3 external environment descriptor zcpr33 command processor flow control (FCP) resident command processor (RCP), z3 termcap z3 named directories but NOT: input/output packages (IOP). Most CP/M 3 features remain active: hashed directories bdos disk buffering RSX capability, including PUT/GET redirection There are some changes: multiple command line is zcpr3 style file-level passwords not supported by the command processor Importantly, no bios changes are required -- Z3ON3 will be a "drop-in" RSX; the user will install and remove "ZCPR33" features from a cp/m 3 system dynamically, with one command. 3. Echelon developed a banked version of ZRDOS for the DT-42, with a cp/m 2.2 bios. I don't believe any other banked versions have been developed. Trying to do one for a CP/M 3 bios would be problematic at best, because CP/M 3 makes fundamental changes in the bios/bdos disk i/o interface. --bridger