One of the things that has been on my list of things to do is to refresh my RSX-11M-Plus image. Time to catch up and test if the new ENC28J60 works as well with RSX as with 2.11BSD!<\/p>\n\n\n\n
The previous image that I was using up to now – the one that’s in the setup walkthrough in the sessions pages – I’m not quite sure when I created that. Some time early 2014 from looking at when the page was published, but it might have been even earlier – I remember doing a lot of work on the page text. <\/p>\n\n\n\n
High time for a new setup, and where else to start than with Johnny Billquist’s image. Get it from ftp:\/\/ftp.dfupdate.se\/pub\/pdp11\/rsx\/pidp\/<\/a> and read the documentation http:\/\/mim.softjar.se\/pidp.htm<\/a>. <\/p>\n\n\n\n There’s one thing though: Johnny’s image is for an MSCP type disk, and PDP2011 doesn’t do those. So we’ll have to copy it to an RP06 – RP07 would’ve been nicer, but RSX doesn’t do those.<\/p>\n\n\n\n Here’s how. Begin by downloading the disk image, and gunzip it, then copy it to a file named work.dsk Then put this in a simh.ini file:<\/p>\n\n\n\n and start simh, as<\/p>\n\n\n\n You’ll get a question ‘Overwrite last track? [N]’, that’s the rp06 image being initialized. Answer Y.<\/p>\n\n\n\n Then boot Johnny’s image: <\/p>\n\n\n\n You’ll get lots and lots of questions about setting up networking. Answer them for the target system – the one you’ll be running on your PDP2011 FPGA. <\/p>\n\n\n\n Yes, you do want the DECnet protocols enabled – that’s the whole point. Think up a node number (I usually use something like 1.20, but if you want to connect to HECnet maybe you should choose more wisely). And you also want TCP\/IP – even more strongly, that’s the point of this image. <\/p>\n\n\n\n If you don’t know what to answer, the defaults are usually ok. I’ve skipped the Multinet questions so far – that’s only relevant if you want your node to join HECnet.<\/p>\n\n\n\n After the networking question-and-answer, you’ll set the time (yay, y2k!) and the system will come up. Log in (‘hello system’, three guesses for the password) and do the following:<\/p>\n\n\n\n Then shut down (‘run $shutup’), copy the rsxrp06.dsk image to an sd card, and boot that on your FPGA. <\/p>\n\n\n\n Have fun!<\/p>\n\n\n\n Oh. Wait. There’s just one thing. <\/p>\n\n\n\n I haven’t published the ENC28J60 support yet. And while working on that, I found a tiny little bug in the ENC28J60 microcode that prevents the initialization of the DEUNA – and that same bug is also present in the ENC424J600 version. <\/p>\n\n\n\n It’s about the card driver in RSX trying to load ‘new and improved’ microcode into the DEUNA by function code 21 ‘load internal memory’ – which goes ok if we just tell it that we did so by setting up for a DNI interrupt. But then it logically tries function code 1 ‘start microaddress’ to which my old microcode truthfully answers with a PCEI interrupt – somewhat like saying ‘sorry I can’t do that’. It’s a simple fix: change the PCEI to a DNI ‘sure I did what you asked’ and everything works as it should.<\/p>\n\n\n\n If you’re impatient, it’s easy enough to do. Go and look for the xubr.mac file, about line 428, and change <\/p>\n\n\n\n into<\/p>\n\n\n\n That’s all. Well, you’ll have to run make (ie, compile the mac source into the binary form in xubr.vhd) and then run Quartus on your project.<\/p>\n\n\n\n Or else wait for a bit, a week or two maybe. I ‘just’ have a couple tiny things to finish up before I publish the new version. <\/p>\n\n\n\n <\/p>\n","protected":false},"excerpt":{"rendered":" One of the things that has been on my list of things to do is to refresh my RSX-11M-Plus image. Time to catch up and test if the new ENC28J60 works as well with RSX as with 2.11BSD! The previous image that I was using up to now – the one that’s in the setup […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3,5,6],"tags":[],"class_list":["post-1516","post","type-post","status-publish","format-standard","hentry","category-hardware","category-pdp11","category-update","missing-thumbnail"],"_links":{"self":[{"href":"https:\/\/pdp2011.sytse.net\/wordpress\/wp-json\/wp\/v2\/posts\/1516","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pdp2011.sytse.net\/wordpress\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/pdp2011.sytse.net\/wordpress\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/pdp2011.sytse.net\/wordpress\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/pdp2011.sytse.net\/wordpress\/wp-json\/wp\/v2\/comments?post=1516"}],"version-history":[{"count":2,"href":"https:\/\/pdp2011.sytse.net\/wordpress\/wp-json\/wp\/v2\/posts\/1516\/revisions"}],"predecessor-version":[{"id":1518,"href":"https:\/\/pdp2011.sytse.net\/wordpress\/wp-json\/wp\/v2\/posts\/1516\/revisions\/1518"}],"wp:attachment":[{"href":"https:\/\/pdp2011.sytse.net\/wordpress\/wp-json\/wp\/v2\/media?parent=1516"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/pdp2011.sytse.net\/wordpress\/wp-json\/wp\/v2\/categories?post=1516"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/pdp2011.sytse.net\/wordpress\/wp-json\/wp\/v2\/tags?post=1516"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}set cpu 11\/70 4m
set rq0 rauser=1024
att rq0 work.dsk
set rp0 rp06
att rp0 rsxrp06.dsk<\/pre>\n\n\n\npdp11 simh.ini<\/pre>\n\n\n\n
boot rq0<\/pre>\n\n\n\n
>mou\/for db0:<\/strong>
>run $bad<\/strong>
BAD>db0:<\/strong>
BAD -- DB0: Total bad blocks= 0.
BAD>^Z<\/strong>
>run $bru<\/strong>
BRU>\/init\/mou du: db0:<\/strong>
BRU - Completed
BRU>^Z<\/strong>
><\/pre>\n\n\n\n bis #40000,@#174510 ; pcei - this function is not implemented<\/pre>\n\n\n\n
bis #4000,@#174510 ; dni<\/pre>\n\n\n\n