Azog-Thoth@cup.portal.com (William Thomas Daugustine) (06/20/91)
About a week or so ago, I posted that I needed help in bringing my PDP-11/34a back to life. With my description as I know it, the many people who responded suggested that I had a memory addressing problem. Better late than never, I looked at it today, and need help on setting a 16k memory model, so itll live at 0x0000. In a brilliant flash of ignorance, I stupidly thought, for some reason, that memory didnt need to live in a specific address range... (majik!) Anyways, I need some help in setting the DIP switch pack(s) for an M7847 module so itll live at the first address, and the first available CSR (if I need to even set the CSR?). This is going to be the only 16k module in the machine, I want to bring it up in a minimal configuration before I go messing with it. I do have 8 other memory boards, for a total of 144k, but I dont wish to use these. Eventually, when I can be sure that the minimum is working, Ill put in a 128kw memory module, and free up that many slots (even free up a whole backplane! 9 modules, 9 slots!) Thanx Billy D'Augustine Azog-Thoth@cup.portal.com PS: in a side question: what is the model number of the Floating Point Unit thatll run in an 11/34a? And does it need to live in a specific slot, such as the next slot from the main processor cards?
terry@spcvxb.spc.edu (Terry Kennedy, Operations Mgr.) (06/21/91)
In article <43481@cup.portal.com>, Azog-Thoth@cup.portal.com (William Thomas Daugustine) writes: > > About a week or so ago, I posted that I needed help in bringing > my PDP-11/34a back to life. With my description as I know it, the > many people who responded suggested that I had a memory addressing > problem. Better late than never, I looked at it today, and need > help on setting a 16k memory model, so itll live at 0x0000. You should have an MS11-J module. In the future, please give the Mxxxx suffix (usually on the next lower handle "rib" from the M-number. That board should have jumpers W1-W2, W3-W4, and W5-W6 inserted. If not, it's not an MS11-J module. The switch settings for memory at 0 are: SW A-C off, SW D-E on, SW F off, SW H on, SW J off (the last three are for I/O page stuff). > In a brilliant flash of ignorance, I stupidly thought, for some reason, > that memory didnt need to live in a specific address range... (majik!) True on almost all VAXen. Not true (as you've discovered) on most PDP-11's. > PS: in a side question: what is the model number of the Floating Point > Unit thatll run in an 11/34a? And does it need to live in a specific > slot, such as the next slot from the main processor cards? FP11-A (M8267). Yes, it has a dedicated slot and (I think) a ribbon cable. Be sure you have a 34A (M8265/M8266) and not a 34 (M7265/M7266) first... Terry Kennedy Operations Manager, Academic Computing terry@spcvxa.bitnet St. Peter's College, US terry@spcvxa.spc.edu (201) 915-9381