JHESS@usc-eclb@sri-unix.UUCP (07/21/83)
If anyone has has purchased dGRAPH to run on their CPM system using a CCS Floppy Disk Controller, the following error message should be familiar: "Overlay Loader: .PRG file missing or truncated" The problem occurs because both California Computer and FOX & GELLER use locations 50-->5B hex. The fix is simple and is described in Jerry Pournelle's July 83 column in BYTE (pp 353). You have to modify your BIOS to move the DEBLOCK PARAMETERS out of page 0 of memory. Use your editor to modify the CCS BIOS as follows: 1. Find and delete the statement IDSV: EQU 4EH ;Sector ID Save area 2. Find the statement BEGDAT EQU$ 3. Add immediately after the statement defining BEGDAT IDSV: DS 8 4. Assemble the BIOS and install as described in the CCS manual Read Jerry's column for additional information.