Recent content by cbscpe

I also built many circuits using the PLCC package. So I still have some on stock. But in the meantime I switched to SMD packages, especially for the ATF1508, it seemed that many of my designs required more than 60 IO pins and the four special inputs than were available on the PLCC84. If...

That sounds not too complicated. Unfortunately Microchip has discontinued the ATF1508 in PLCC. But I think that GALs are capable enough to cover all the needs for decoding, interrupt logic, block mode DMA etc. Space also should not be an issue unless you plan for a full 4Mbyte.

Thanks for the link to the document. I always was looking for a schematic of a block mode DMA capable RAM to cross check with what I have came up with. With this I think I will finally be able to add block mode DMA support to my PDP-11 memory. When I understand you correctly, you want to use...

Indeed support for parity and variable character length is not possible by the DC319, but on the other hand I was more asking regarding the bus interface, especially the interrupt handling logic.

Great project, congratulations. Very nice, such multifunction board really help to keep the systems small. If I can ask, can you share the information about the glue logic, which makes a DC319 a full fledged DLV11? I actually was at the same point with EAGLE and limited license, hence my RLV12...

Yes I would love to have documents in txt format. Actually preferring txt over pdf, for me it's much easier to read and the code blocks are preserved, which in this case is very important. And it gives it a nostalgic touch.

Here a short update. With great support from Ian I managed to build and install DECUS C as in 11sp68 on RT-11 and I'm able to compile and assemble the RQDX3 sources. In fact, once you now how to do it it is not as complicated as thought at start. And with simh and fast computers nowadays the...

Which means there was a DOS program which could do this? Do you remember the name of the program? Peter

Ok, this was easier than I though, // is not a valid comment in DECUS C, changing it to the original /*....*/ block and now it compiles. And of course I had to take care of the orignal delete tmp:hello.*/noquery in the comment as well #include <stdio.h> /* * Execute the embedded build...

The problem is that the output from cc is rather nonsense. .run c:cc ?KMON-F-Insufficient memory .vrun c:cc CC> HELLO .run c:as AS> hello .type hello.s / Decus C patch level 0, Compilation date: "Thu 6 0 01 19:42:16 1993" .psect c~data d w .psect c~data d w .even...

I have some problems. So I did the following .show TT (Resident) DL (Resident) DL0 = DK , SY MQ (Resident) LD SL DU (Loaded) = C DY VM SP MU LP NL 19 free slots .dir c: 01-Jul-2025 AS .SAV 36 15-Feb-2004 CC .MAP 62 18-Jun-2011 CHRTAB.H 5...

I would be highly interested in the text file. I have seen your repository and Lee also pointed me to it, but I was not aware that the dcc.dsk is the complete kit. How I am supposed to use the dcc.dsk? is this an RT-11 image or a tape or a RX02 floppy (although in this case the size is short by...

For those interested, in 2021 when Al Kosov first linked the RQDX source code in this forum I started to analyze the source code and starting from a disassembled RQDX3 ROM and started to assign the code to the individual source files, added labels and some comments. It's not perfect but it was...

One question, what is the fastest way to make a distribution tape/disk from the files on the this site?

Thanks a lot, I did not know this site.