C O M P U P R O PRODUCT ASSURANCE TECHNICAL BULLETIN BULLETIN #39 6/3/86 ***************************************************************** SUBJECT: PATCHES TO BDOS.CON TO CORRECT BUGS DEALING WITH DOS MEDIA ON CONCURRENT DOS 4.1 SYSTEMS PRODUCTS AFFECTED: ALL SYSTEMS USING CONCURRENT DOS 4.1 WITH DOS MEDIA PROBLEM: Two bugs have been identified by Mickey Singer from Personalized Programming in the BDOS.CON module from Digital Research. These two patches deal with a bug in the LRU buffering with DOS media, and a record locking bug in subdirectories in DOS media. These two patches have been recommended by Personalized Programming, but are not official Digital Research patches. CompuPro is not currently installing these patches in the 4.1 releases of Concurrent DOS, but recommends that they be installed if using record locking with DOS media. SOLUTION: The solution to this problem is to patch the BDOS.CON module and then regenerate the CCPM.SYS file from this patched module. The procedure for this patch is listed below: PATCH PROCEDURE: Make a back-up copy of BDOS.CON before using SID86.CMD to make the following changes. User entries are underlined. 0A>SID86 SID86 1.0 #rBDOS.CON START END XXXX:0000 XXXX:5AFF #XCS CS 0000 YYYY (Where YYYY=XXXX+8) DS 0000 YYYY SS WXYZ . #LA3A,A3A XXXX:0A3A JNZ 0A59 (LRU BUG) #aA3A XXXX:0A3A JNZ A9A XXXX:0A3C . #L2189,218F XXXX:2189 MOV AX,[0BB9] (RECORD LOCKING BUG) XXXX:218C MOV [0882,AX XXXX:218F MOV AX,[08E7] PRODUCT ASSURANCE TECHME39.DOC 6/3/86 PAGE 1 of 2 #a2189 XXXX:2189 CALL 1EF4 XXXX:218C JZ 21A2 XXXX:218E NOP XXXX:218F NOP XXXX:2190 NOP XXXX:2191 NOP XXXX:2192 . #L1EF4,1EF8 XXXX:1EF4 MOV BX,[BX] XXXX:1EF6 OR BX,BX XXXX:1EF8 JZ 1F08 #A1EF4 XXXX:1EF4 MOV AX,[0BB9] XXXX:1EF7 MOV [0882],AX XXXX:1EFA OR AX,AX XXXX:1EFC MOV AX,[08E7] XXXX:1EFF RET XXXX:1F00 . #wBDOS.CON #^C 0A> Save this new corrected copy of BDOS.CON so that the next time you GENCCPM a system, you will use the corrected module. At this time, you can regenerate your CCPM.SYS file as described in your documentation. Any questions concerning this Technical Bulletin should be addressed to: Product Assurance Department CompuPro/Viasyn Corporation 26538 Danti Court Hayward, CA 94545-3999 PRODUCT ASSURANCE TECHME39.DOC 6/3/86 PAGE 2 of 2 ----- 190. [Internet] "Ist es eine Leitungsst?rung? Ist es ein Coredump? Nein, es ist sendmail.cf." --Kristian K?hntopp --... ...-- -.. . -. ----. --.- --.- -... tpeters at nospam.mixcom.com (remove "nospam") N9QQB (amateur radio) "HEY YOU" (loud shouting) WEB: http://www.mixweb.com/tpeters 43? 7' 17.2" N by 88? 6' 28.9" W, Elevation 815', Grid Square EN53wc WAN/LAN/Telcom Analyst, Tech Writer, MCP, CCNA, Registered Linux User 385531