On Wed, Jun 15, 2016 at 1:12 PM, Henk Gooijen <henk.gooi...@hotmail.com> wrote:
> -----Oorspronkelijk bericht----- From: william degnan Sent: Wednesday, > June 15, 2016 5:35 PM To: cctech Subject: DL11 M7800 > OK. I must be missing something here > > Does anyone have a M7800 (DL11) set for 9600 b N71 or N81 jumper'd with the > default address for use as a serial terminal interface? I understand the > other jumpers on the card, but the address and vector jumpers confuse me. > I can't seem to find a table or a "here is the default for console" or I > don't get it. I have the manual, I want I believe 777560, but I cannot find > "table 5-2" referred to in my copy of the manual. Can someone give me a > couple of examples "if you have Ax Ay Az connected then that represents > address ------- . > > I am looking at the manual and web sites on the subject and I think for use > as a simple serial terminal interface I need to jumper "in" *A9, A7, A5, > A4, A3* ... correct? Vector jumpers *V6, V7 "*in" . Just curious if > anyone can help me specifically not indirectly what I need, super thanks in > advance. > > Thanks > Bill > > --------- > Doing this from memory ... I actually configured an M7800 for console > a week ago! But I left my notes in the "museum", 9 km away. I could get > it on Saturday ... > Anyway, I did it using the doc from bitsavers, so it is not too hard: > > http://bitsavers.informatik.uni-stuttgart.de/pdf/dec/unibus/EK-DL11-TM-003_DL11_Asynchronous_Line_Interface_Manual_Sep75.pdf > > The gotcha: for address jumpers a jumper installed makes it a "0", > whereas a jumper installed for the vector makes it a "1". I found it > pretty confusing, seeing how many scribbled remarks I made on paper :-/ > Console address is 777560. The last "0" is A0-A1-A2, and these do not > have jumpers. So A5-A4-A3 sets the "6", A8-A7-A6 sets the "5", and > A10-A9 sets the low two bits of the "7". (there is no A11). > Console vector is 060. Same story. V2-V1-V0 is not available, so you > only have to set the "6" (V5-V4 jumpered). > > To get 9600 Bd, check the crystal. It has to be the frequency listed > in the 4th column in the documentation, else 9600 is not selectable. > Note that there are two tiny rotary switches on the board. One to set > the transmit baudrate, the other the receive baudrate. > > Testing is easy too. Just LOAD ADDR 777564, then EXAM. If all is correct > you will see 0200 (transmit buffer emtpy flag set). Press EXAM again. > The "address" is now set to 777566 (transmit buffer). Toggle 073, then > DEP. If all is right, you will get a "3" in the terminal. > > - Henk > This further helps my understanding. Problem is, the card is bad. Knowing it's probably jumpered correctly (assuming I have everything right, which is a big assumption) I will check the 1488/89 drivers, etc. to see what's wrong with the card. I have a working M7856 serial card so I know the terminal is ok, CPU is not farting out, etc. I have a pdp 11/40 with 16K core and M9312 ROM/Terminator that I am working on. Making some progress lately. -- @ BillDeg: Web: vintagecomputer.net Twitter: @billdeg <https://twitter.com/billdeg> Youtube: @billdeg <https://www.youtube.com/user/billdeg> Unauthorized Bio <http://www.vintagecomputer.net/readme.cfm>
