VBRANDT@DBNUAMA1.BITNET (08/03/89)
In Info-Atari16 Digest #351, mcvax!ukc!reading!bru-cc!ralph@uunet.uu.net (Ralph Mitchell) writes: >ETERNAL2 doesn't actually work in a Mega 4... Using HiSoft's resident >monitor I have tracked it down to the bit where it checks to see if the >ram disk is already resident. It picks up the system variable that gives >the physical top of memory and then fetches the word (or byte ?) from that >location. The location specified is one past the end of real memory, but >the MMU is quite happy to return 0xFF for non-existent locations. In the >Mega 4, however, the non-existent location is beyond the maximum address >that the MMU can handle, so it gets a real bus error. Moshe ?? This was discussed several months (years? :-) ago when the Mega ST4 first came out. The ETERNAL2 RAM disk wasn't written by Moshe Braner, but by John Franco (if I remember correctly). The behavior you describe is indeed the problem. I fixed it, added a few more features and emailed the resulting file to a few people. I can send you a copy if you want. ---------------------------------------------------------------------------- Bitnet: VBRANDT@DBNUAMA1 (will go away late '89) Volker A. Brandt UNM409@DBNRHRZ1 (soon) Angewandte Mathematik UUCP: ...!unido!DBNUAMA1.bitnet!vbrandt (Bonn, West Germany) ARPAnet: VBRANDT%DBNUAMA1.BITNET@CUNYVM.CUNY.EDU