Hit the Send button too fast. That is a nice complete machine you have, Charles. I remember paying just UK ?300 for only that RH11. Start looking for a MASSBUS tape drive, or disk drive, ** if you have plenty room and power **. The MASSBUS stuff is not for the weak persons. All my MASSBUS stuff is heavy, both in weight and in power consumption! MASSBUS cables are approx. 30 - 40 mm thick ... I have some MASSBUS stuff in the 11/70 page on my site. As said, "I know notting" about the 11/24. - Henk, PA8PDP. ________________________________ Van: cctalk-bounces at classiccmp.org namens Charles Verzonden: za 07-01-2006 21:30 Aan: cctalk at classiccmp.org Onderwerp: New 11/24, what to do first? More info. Don't worry, Pierre, I did all that as soon as I got it home, well before plugging it in. But thanks for the reminder. I have now inventoried the cards and have the following: 1 M7133 KDF11-UA 11/24 CPU with line clock and 2 SLU 1 M7134 KT-24 Unibus map, extension to 22 bits 1 M8743 (ECC RAM, either 512 Kb or 1 Mbyte) 2 M8722 (ECC Memory either 128 Kb or 256 Kb each) 1 M8188 FPF11 floating point processor 1 M7762 RL11 disk controller RL01/02 1 M7258 LP11 printer controller 1 DSD A2130-6 <---------- (what is this? Floppy controller?) 4 M7819 DZ11-A eight RS232 ports each 1 M920 Unibus connector 1 M7297 RH11 MASSBUS Parity Control 1 M7296 RH11 MASSBUS Control & Status Registers 1 M7295 RH11A MASSBUS Bus Controller 1 M7294 RH11 MASSBUS Data Buffer and Control 3 M5904 RH11 MASSBUS Control Transceivers 1 M9300 Unibus terminator 1 M9312 Bootstrap Terminator According to the PDP11 Bus Handbook the Massbus is for transferring blocks of data at high speed (between mass storage devices like disks or tapes?) When I flip the BOOT switch the front panel RUN light comes on briefly and goes out again. Similar behavior to the 11/23+ when it enters ODT mode. There is a green LED on each MOS memory board which is lit, and a row of three (status?) LED's on the CPU, the rearmost staying lit and the other two dark. Time to RTFM I guess :) but I'll bet I can hook up a terminal to the SLU on the CPU board and have it talk to me! I wonder, since there is an RL controller card, -Charles This message and attachment(s) are intended solely for the use of the addressee and may contain information that is privileged, confidential or otherwise exempt from disclosure under applicable law. If you are not the intended recipient or agent thereof responsible for delivering this message to the intended recipient, you are hereby notified that any dissemination, distribution, or copying of this communication is strictly prohibited. If you have received this communication in error, please notify the sender immediately by telephone and with a "reply" message. Thank you for your cooperation.