I modified my simh configuration to include the second DL[V]11 style serial port on the 11/53. As Johnny predicted, this does indeed move the floating vector for the DZ11/CXY08. No joy, however. It doesn't make any different to RSX - ACF still dies as before. The entire log, including the simulator configuration, is attached in anybody wants to double check that I'm not doing something stupid. And I verified again that I can simply set the CPU type to 11/23 and it'll work fine. There are no other configuration changes except the CPU. Bob Logging to file "pavane.log" sim> show dev PDP-11 simulator configuration CPU, 11/53, NOCIS, idle disabled, autoconfiguration enabled SYSTEM RHA, disabled RHB, disabled CLK, 60Hz, address=17777546-17777547, vector=100 PCLK, disabled PTR, disabled PTP, disabled TTI, address=17777560-17777563, vector=60 TTO, address=17777564-17777567, vector=64 CR, disabled LPT, disabled DLI, address=17776500-17776507*, vector=300-304, lines=1 DLO DCI, disabled DCO, disabled DZ, address=17760100-17760107*, vector=310-314, lines=8 VH, disabled RC, disabled RF, disabled RK, disabled RL, disabled HK, disabled RX, disabled RY, disabled RP, disabled RQ, KDA50, address=17772150-17772153*, no vector RQB, disabled RQC, disabled RQD, disabled TC, disabled TM, disabled TS, disabled TQ, TK70 (300MB), address=17774500-17774503, no vector TU, disabled TA, disabled XQ, address=17774440-17774457, no vector, MAC=08:00:2B:AA:BB:CC, type=DEQNA, poll=100 XQB, disabled XU, disabled XUB, disabled KE, disabled KG, disabled sim> b rq RSX-11M-PLUS V4.3 BL66 2044.KW System:"Baseline" RED DU:=SY: RED DU:=LB: RED DU:=SP: MOU DU:"RSX11MPBL66" @LB:[2,54]BASTART.CMD SET /CRASHDEV=MM0: SET -- Crash device MM000: has been successfully loaded Z[c SET -- Inquire cannot determine terminal type ; ; Please ignore any random characters that may have printed on your ; terminal just now. They came from a SET /INQUIRE=TI: command. ; Evidently your terminal does not recognize escape sequences. ; This will not affect the running of this command file. ; * Do you wish to see the Installation Notes? [Y/N]: n SET /UIC=[200,200] ; ; PLEASE NOTE ; ; If you have not yet read the system release notes, please do so ; now before attempting to perform a SYSGEN or to utilize the new ; features of this system. ; ; ; In order to start the SYSGEN process, type: ; ; >@SYSGEN ; ; When SYSGEN has completed and your generated system is ; running, you may wish to edit several DIGITAL-supplied ; prototype command and text files to suit your system ; and application: ; ; File Purpose ; ---- ------- ; [0,0]RSX11.SYS An account/password file ; This file does contain privileged accounts. ; ; [1,2]STARTUP.CMD (This file) Invoked at bootstrap time to ; control bringing up the system. ; ; [1,2]QMGSTART.CMD Invoked by STARTUP to start up the Queue ; Manager and spooling system. ; ; [1,2]SHUTUP.CMD Invoked by SHUTUP when taking down the system ; to perform system dependent shutdown tasks. ; ; [1,2]QMGSTOP.CMD Invoked by SHUTUP to stop the Queue Manager ; and spooling system. ; ; [1,2]LOGIN.TXT Displayed on user's terminal when logging in. ; ; [1,2]BATCH.TXT Displayed at the beginning of each batch log ; file. ; Z[c SET -- Inquire cannot determine terminal type ; ; Please ignore any random characters that may have printed on your ; terminal just now. They came from a SET /INQUIRE=TI: command. ; Evidently your terminal does not recognize escape sequences. ; This will not affect the running of this command file. ; * Please enter time and date (HH:MM DD-MMM-YY) [S]: 09:21 12-jul-84 TIME 09:21 12-jul-84 ACS SY:/BLKS=1024. CON ONLINE ALL ELI /LOG/LIM CLI /INIT=DCL/CTRLC/DPR="<15><12>/$ /" INS LB:[1,1]RMSRESAB.TSK/RON=YES/PAR=GEN INS LB:[1,1]RMSLBL.TSK/RON=YES/PAR=GEN INS LB:[1,1]RMSLBM.TSK/RON=YES/PAR=GEN INS $QMGCLI INS $QMGCLI/TASK=...PRI INS $QMGCLI/TASK=...SUB QUE /START:QMG INS $QMGPRT/TASK=PRT.../SLV=NO QUE LP0:/CR/NM START/ACCOUNTING CON ESTAT LP0: QUE BAP0:/BATCH QUE BAP0:/AS:BATCH @ <EOF> @sysgen ; ; RSX-11M-PLUS V4.3 BL66 SYSGEN ; ; COPYRIGHT (c) 1990 ; DIGITAL EQUIPMENT CORP., MAYNARD MA., 01754 ; SET /DPRO=[RWED,RWED,RWE,R] ; ; To exit from the SYSGEN procedure at any time, type CTRL/Z. ; ; If you are unsure of the answer to a question for which a de- ; fault answer exists, use the default answer. ; ; ; ;=================================================== ; Choosing SYSGEN Options 12-JUL-84 at 09:21 ;=================================================== ; ; ; ; Every question is preceded by a question number (for example SU010) ; which you can use to find the explanation of the question in the ; RSX-11M-PLUS System Generation and Installation Guide. ; ; An explanation of every question is also available by pressing ; the ESC key (or the ALTMODE key) in response to the question. ; ; If you are unfamiliar with the SYSGEN procedure, the explanation of ; each question can be printed automatically before the question. ; * SU010 Do you always want the explanation printed? [Y/N D:N]: n ; ; SYSGEN always creates saved answer files containing your responses ; to the SYSGEN questions: ; ; SYSGENSA1.CMD Setup questions, Executive options ; SYSGENSA2.CMD Peripheral configuration ; SYSGENSA3.CMD Nonprivileged task builds ; ; You should perform a PREPGEN first to create saved answer files, and ; then perform a SYSGEN, specifying those saved answer files as input ; to the Executive, peripheral, and nonprivileged task build sections. ; * SU020 Do you want to use a saved answer file as input for * the Executive options? [Y/N D:N]: n ; * SU040 Do you want to use a saved answer file as input for * the peripheral configuration? [Y/N D:N]: n ; * SU060 Do you want to use a saved answer file as input for * the nonprivileged task builds? [Y/N D:N]: n ; * SU080 Do you want to do a PREPGEN? [Y/N D:N]: n ; * SU090 Enter the name of the disk drive containing your * target system disk [ddnn:] [S R:2-5]: DU0: ; ASN DU0:=IN: ASN DU0:=OU: ASN DU0:=LB: ASN DU0:=WK: ASN DU0:=TK: ASN DU0:=BC: ASN DU0:=LI: ASN DU0:=OB: ASN DU0:=EX: ASN DU0:=MP: ; * SU100 Do you want to run Autoconfigure on the host system * hardware? [Y/N D:N]: Y ; ; Running Autoconfigure: ; INS $ACF ACF [About 4-5 minutes have elapsed - RLA] Simulation stopped, PC: 136514 (BMI 136512) sim> quit Goodbye Log file closed