[HECnet] Re: APL help needed

The APL-11 source code as distributed by DECUS does not task build properly under later versions of RSX. Johnny Billquist following on the work of Lee Gleason (see https://rsx11.blogspot.com/2021/02/ ) fixed those problems. Johnny also fixed some other issues with APL-11 like Y2K dates and named directories. It also uses I/D so the workspace is twice as big as the normal APL-11 work space size. As Johnny said he has those fixed sources for APL-11 on MIM.

Running with out an FPP might more easily be solved by using an FPP emulator that is found on the DECUS SIG tapes. I used this many years ago to be able to use Fortran 77 on a PDP-11/44 that did not have the FPP. It is a bit slower but not really any worse than doing the FP operations inline. It worked by using the illegal instruction trap to vector to the FPP emulator so it has the advantage of not using task address space. I think the latest version of the FPP emulator was on the RSX86B SIG tape. The file you want is [300,21]FPPEMULAT.MAC If you don’t have the RSX SIG tapes handy let me know and I can send it to you by HECnet NFT or email attachment.