test-drb April 2010

test-drb@ccmp.vtda.org

172 participants
242 discussions

by julianskidmore＠yahoo.com

Hi Cameron, > Anyone know of an equivalent for 601 that will still > work on 603+? Or am I as dead in the water as I suspect? The rdtsc function has its origin in the rdtsc instruction on an x86 CPU, it returns a 64-bit value, the number of cycles since power on. I can see from the rdtsc function for PowerPC that it is implemented using a routine, so it's exact performance isn't critical I would presume. The nearest instruction on a 601 is mfspr rd,6 which loads the decrementer. This is a user-level instruction on the 601 (not on the 603 or later). So, -DEC roughly the tb. According to the Ppc601 user manual, dec uses the 7.8125MHz RTC clock as its time base (pg H-3), but on page B-8 it says the power architecure decrements dec every nanosecond. So, we could do something like: static __inline__ unsigned long long rdtsc(void) { asm { mfspr regUpper,6 }; return (long long)-regUpper<<32; } In this case, the effective frequency of the clock is 7.8125MHz*2^32. For the PowerPc601. On initialisation I would probably read the processor version register (PVR) to determine the processor; and if it was a 601 I'd substitute the PowerPC 601 code and then flush the code and data caches. -cheers from julz @P

14 years, 7 months

RK8E controller board revisions - Chaos ahead, help needed

by hachti＠hachti.de

Hi folks, I'm currently dealing with some RK8E Omnibus RK05 controller board sets. I was unable to assemble even one stable RK8E from the stuff. I assume a high failure rate. But I also assume that I have board revision problems. I've been told that several revisions existed. And that there were compatibility issues and some kind of paper (which I do not have) telling what fits what. I don't even know if the revisions are PCB revisions like "M7104 B2" written in the etch or if there are also FCOs or alike that make boards with same etch incompatible to other boards. My personal RK8E passes all tests. It consists of: M7104 B2 M7105 B1 M7106 C But I have other boards flying around here as well. Do stamps like "310 D" on the backside of the boards have any meaning with respect to board revision or FCO level? Another question is how to get different board revisions associated with the right schematics. I strongly appreciate any piece of enlightenment since I'm currently getting depressed by that stuff. Even if I have bad boards - it won't make sense to try to repair something if the whole is inconsistent in itself. Many thanks, Philipp

14 years, 7 months

Free DAT tapes

by lproven＠gmail.com

Does anyone have a need for DDS2 tapes any more? I gave away my last drive to a list member, meaning I have tons of blank tapes lying around - many new, shrinkwrapped, some in boxes of 5 or more. Free for the postage or you can collect. They're in London, England. -- Liam Proven ? Profile: http://www.linkedin.com/in/liamproven Email: lproven at cix.co.uk ? GMail/GoogleTalk/Orkut: lproven at gmail.com Tel: +44 20-8685-0498 ? Cell: +44 7939-087884 ? Fax: + 44 870-9151419 AOL/AIM/iChat/Yahoo/Skype: liamproven ? LiveJournal/Twitter: lproven MSN: lproven at hotmail.com ? ICQ: 73187508

14 years, 8 months

The Computer Journal (Citrus Heights version)

by dgriffi＠cs.csubak.edu

Has anyone digitized The Computer Journal[1]? I have a collection of issues from 15-21, 23-26, 30-41, 51, 53, 56-59, 61, 62, 65-72, 74-80. [1] Not the one by the Oxford University Press, but the one published by someone in Citrus Heights California. -- David Griffith dgriffi at cs.csubak.edu A: Because it fouls the order in which people normally read text. Q: Why is top-posting such a bad thing? A: Top-posting. Q: What is the most annoying thing in e-mail?

14 years, 8 months

Geek stuff auction

by silent700＠gmail.com

The HiPAS site in Fairbanks that did aurora research for ~30 years is shut down and being auctioned off...besides the office supplies and coffee makers, there is a lot of test equipment and such. Not much strictly classiccmp, although there is a VT100 :) http://www.proxibid.com/asp/Catalog.asp?aid=27290

14 years, 8 months

PPC 601 and mftb/mftbu

by spectre＠floodgap.com

Okay, old PPC hands, here's today's challenge. I finished porting SpiderMonkey (the pure C JavaScript reference implementation) to Classilla, which is the web browser I maintain for classic Power Macintoshes in OS 8.6 and 9, and it works great. So, for an encore, I decided to see how feasible porting TraceMonkey would be, which precompiles selected portions into assembly using a "nanojit." I started working on translating the inline assembly into CodeWarrior, but CodeWarrior did not like my conversion of their "rdtsc" function, which uses the mftb/mftbu instructions. The reason is that I'm compiling for 601, and CodeWarrior will only assemble those instructions for 603 and higher. Anyone know of an equivalent for 601 that will still work on 603+? Or am I as dead in the water as I suspect? Mind you, I don't even know if the rest of this will work on 603s or 604s, so this might just be the first of a whole mess of problems. I wasn't sure if it would work in the first place, and SpiderMonkey already cut Classilla's JavaScript execution time in half, so it's not like this is a catastrophe. Still, I'd love to get JIT compilation working if I can. -- ------------------------------------ personal: http://www.cameronkaiser.com/ -- Cameron Kaiser * Floodgap Systems * www.floodgap.com * ckaiser at floodgap.com -- If the dictionary misspells a word, how would you know? -- Steven Wright ---

14 years, 8 months

Rusty pdp8/e chassis anyone?

by hachti＠hachti.de

Hi folks, today I slaughtered a pdp8/e computer. The guts will go into further use and repair of other machines, but the chassis underside is still there. As I have no use for it I'm offering it as free for everyone. It's just the lower part of the chassis. There's no Omnibus, not PSU, no nothing with it. And it's really really rusty. That's the reason why I decided to dismantle the system. If anyone is interested, let me know. The chassis could be brought back to life via sanding and repainting. Local pickup (northern Germany) preferred, shipping possible (but seems to be quite useless). Regards, Philipp

14 years, 8 months

In Bay Area

by wdonzelli＠gmail.com

As with past years, this first week in May I will be in the SF Bay Area, and would certainly be interested in meeting fellow collectors and seeing their neat-o machines. So far I am meeting a few people, mostly for deliveries of things from far away, but can probably squeeze in a few more visits. Any takers? Please contact me off list. -- Will

14 years, 8 months

low cost prototype PCB vendor?

by lynchaj＠yahoo.com

http://classiccmp.org/pipermail/cctalk/2010-April/285344.html [snip] >Can you relate your issues with Advanced Circuits, just so others who >might want to use them might be able to take it into account? > >Jim Hi Jim! Please don't get me wrong, I *like* Advanced Circuits and they've been great. I wish I was wealthy enough to do all my boards with them and surely would were I in business. Of course, the N8VEM project and the S-100 boards with John from S100Computers.com are basically self funded hobby projects and on "shoe string" budget. I really can't afford AC's premium quality boards though I wish I could. The trouble is with my ability to order boards from the AC website. Their special deals are internet only which is fair but when I try to upload my files to the AC website I get errors and cannot complete the order. The people at Advanced Circuits have been great and I have no complaints but for the last few orders I've had to call them and basically "finesse" my orders into the system using phone calls and email. I can see that is going to get old quickly and soon AC will run out of patience with me. Then I am screwed and need a new way to get prototype PCBs. I've worked with their IT people and the local sales rep to figure out the problem. They say the file upload connection is timing out someplace like there is a bad link between my network and theirs. The weird thing is that I can upload files to freeDFM.com which is also an AC free service as much as I want and it works reliably. Frankly, the whole problem makes no sense to me. Thanks and have a nice day! Andrew Lynch

14 years, 8 months

FTP from Windows to VMS

by arcarlini＠iee.org

Rob Jarratt [robert.jarratt at ntlworld.com] wrote: > I sniffed the packets a few days ago and posted this in my first post: Sorry, must have been before I started to follow the trhead. I have this lot lying around: KRAKAR::SYSTEM> dir sys$manager:*ucx*.log Directory SYS$SYSROOT:[SYSMGR] UCX$FTPSERVER.LOG;130 UCX$FTPSERVER.LOG;129 UCX$FTPSERVER.LOG;128 UCX$FTPSERVER.LOG;127 UCX$FTPSERVER.LOG;126 UCX$FTPSERVER.LOG;125 UCX$FTPSERVER.LOG;124 UCX$FTPSERVER.LOG;123 UCX$FTPSERVER.LOG;122 Total of 9 files. Assuming your UCX keeps its logs in a similar place, have a look and see what you get. (Mine are all quite boring ... it works for me :-)). (And I'm sorry if you've done this already too ...) Antonio

14 years, 8 months

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test-drb April 2010