This version of Jim Lopushinsky's SETRSX program is the result of not wanting to lose use of LBRDISK while running under Backgrounder II (BGii). The revision of SETRSX supplied in LBRDSK23.LBR insists on an operating environment that has a BDOS call vector destination address with an LSB of 06H, otherwise it will crash. This effectively prevented use of LBRDISK in any system where other RSXs were present unless the RSX lowest in memory conformed to the arbitrary xx06H convention. This limitation is now eliminated. You still cannot swap BGii tasks if SETRSX and LBRDISK are present unless the Plu*Perfect SECURE utility RSX is loaded under LBRDISK. You must specify the SECURE protect address on the command line because otherwise LBRDISK's CP/M+-style RSX header will throw SECURE into a dither. LBRDISK's sheer size makes swapping with it resident a somewhat suspect endeavor anyway, but the long-term solution (any takers?) to this problem would be a full rewrite of the LBRDISK package in the far more flexible Plu*Perfect RSX format. The author has never released the source to any of the LBRDSK23 programs, so this package was concocted by first updating the source of earlier versions of the SETRSX modules to the LBRDISK23 revision level and then, with the kind assistance of BGii author Bridger Mitchell and a little luck (SETRSX always ran just dandy under Prof. Falconer's DDTZ, which just happens to follow the xx06H rule), searching out and correcting the code that caused the limitation. In addition, SETRSX is now just a bit more intelligent about where it plants the RSX manager, which now gives an informative "RSX active" message on warm boot attempts. All my added code and labels are in upper case. Almost any Zilog- mnemonic assembler can be used to rebuild the modules and all the popular linkers can handle the loader portion of the program, but (unless an alternative has eluded me) DRI's venerable LINK will be needed to create a new RSX.PRL. The added source file, ZSETRSX.MAC and the program ZSETRSX.COM cater to ZCPR33/BGii systems that can handle Type 3 tools. ZSETRSX.COM loads and runs at 8000H, which is handy if you want to remove LBRDISK and the RSX manager without corrupting the lower TPA or if you simply want to protect the CCP under similar constraints. Bruce Morgen - June 13, 1987