test-drb June 2016

test-drb@ccmp.vtda.org

196 participants
290 discussions

by jnc＠mercury.lcs.mit.edu

> From: Rod Smallwood > You could if you were able to get into ODT. I have yet to discover how > you get there. What happens when you move the "Halt/Run/Restart" switch on the front console to "Halt"? (Note that the "Off/Enable/Secure/Standby" switch must be in the "Enable" position for the H/R/R switch to be active.) That should put the CPU in ODT. Noel

9 years, 1 month

Floppy Music? Anyone seen this?

by alexmcwhirter＠triadic.us

Yea more or less... https://www.youtube.com/watch?v=8kQYRquhcXU I find it really cool, probably ruins the drives but cool nonetheless.

9 years, 1 month

MINC-11 boards

by wdonzelli＠gmail.com

I have some rather rough set of MINC boards - A/D, D/A, digital, and clock. These were outside for some time in California. Not super rusty, but weather worn. I think you could clean them up. Trade for? I could use some R, S, and B modules. Other interesting stuff? -- Will

9 years, 1 month

Need 2x20 DIP header (40 pin, as for IDE)

by drlegendre＠gmail.com

Anyone have a spare 2x20 (40 pin) DIP header they can stick in an envelope? I'm checking eBay and all I see are 10-packs and/or silly shipping. I believe this is the standard board-mount IDE connector? Either gold or bright tin plating are fine. Happy to reimburse you for the cost of the part & 1st Class stamp! ;-)

9 years, 1 month

The RSTS riddle.

by rodsmallwood52＠btinternet.com

Hi Further to my posts this morning I have one last hurdle to jump. 1. I have a VAX with a TK70 attached and a TQK70 controller. 2. The tape drive works just fine. 3. Also on the VAX I have the correct tape (.TAP) image file for a RSTS/E V10 install tape. 4. I would like to copy the .tap file to the tape so as to end up with a bootable install tape. 5. I then power down the VAX and move the controller to an 11/83. (The drive is external with its own PSU) 6. Boot the install tape and go from there. So suggestions please as to how to do 4. Rod Smallwood

9 years, 1 month

PDP-11/94-E

by jnc＠mercury.lcs.mit.edu

> From: Rod Smallwood Ah, sorry about the previous message - hadn't gotten to this one yet! :-) > 2. This is then followed by a request to type a letter B for boot , L > for list and so on. > 3. You can type any letter you like and it always goes to the same > screen. I wonder if there's a case issue - have you tried upper and lower? > 7. The Unibus adapter appears to pass all of its tests. > I have two and they both perform the same. > 8. The next slot to the UBA is an RX211 .. It is set to the standard > addresses. Again I have two and the result is the same in both cases. Now that's _very_ interesting indeed. That cuts out a lot of the simple explanations (broken RX211 or KTJ11 - unless both of one of them are busted). One thing to check (sorry if you've already checked this) - did the address switches somehow get inverted (i.e. 'off' where it should be 'on', etc)? I'm too lazy to work my way through all the inversions in the address recognition logic (the print set is available online, Google "MP00626") to see whether 'off' means '1' or '0'; I couldn't find a manual for the RX211, which would say explicitly (the RK02 manual doesn't seem to cover configuration of the RX211). If that's not it, it may be time to break out the 'scope / logic analyzer. Luckily we do have the RX211 prints. I can whip you up a short program to try and read the CSR which you can 'toggle' in through ODT, if you've got a 'scope, not a LA. First thing to check would be to see if there are even cycles getting to the UNIBUS. > 9. The next three slots have bus grant cards In the right connector, and in the right way around? (I know, I know, but at this point, we're grasping at the proverbial...) > 13. I have tried a couple of other controllers - same result. As in, other kinds of boards on the UNIBUS? That's also interesting. > 13. ... I'd like to get both monitor and boot proms back to standard. I suppose it's _possible_ there's an error in the non-standard PROMs that somehow buggers up the KTJ11. According to the "PDP-11/94 System User and Maintainence Guide" (EK-PDP94-MG-001, available online), pg. 5.49, the KTJ11 has some maintainence registers which can be set to cause it to do strange things (I'm just trying to absorb them all now). One thing to note: 'Diagnostic Mode' is set at power-on, and when set, it "the UNIBUS is disabled". So powering the machine on with it set to 'Halt' (so the boot isn't run), and using ODT to poke UNIBUS registers won't work. You'd have to let the startup run (which presumably leaves the UNIBUS turned on - or maybe not, something worth checking) and then halt it to use ODT. Anway, it would be interesting to see what the KTJ11's DCSR (at 17777730) contains. Noel

9 years, 1 month

PDP-11/94-E

by jnc＠mercury.lcs.mit.edu

> From: Rod Smallwood > On switch on the console display comes up. Whilst it performs the same > functions as the one in the manual it looks different. Hmm. Does it seem like a DEC EPROM, or someone else's? The 11/84 (very similar CPU) has a 'list' command which lists all the various EPROM's; does you console emulator provide that? > What ever I do by way of setting up devices I can't get it to talk to > the RX211. Try stopping the console emulator and falling into ODT, and seeing if you can see the RK211's registers from ODT. If not, does the 11/94 have that 'map' command in the console emulator that the 11/84 does? Another thing to try is, if you have some other UNIBUS device, plugging that in, and seeing if the CPU can 'see' it. Noel

9 years, 1 month

PDP-11/94-E

by jnc＠mercury.lcs.mit.edu

> From: Rod Smallwood >> The RX02 controller (RX211) should be at 17777170-6. > OK Here's what I did > ... > Turn machine on drop into ODT key location in and press / get ? > same for all of the others. This is for attempting to read 17777170-6? (One needs the exact details, always! ;-) If so, either i) the RX211 card is set for some other address (check its address switch at E74; switch 1 {pins 1-20] is the 010 bit in the address, on up to 010000 at switch 10), ii) the RX211 card is defective, or the KTJ11 is defective. Since you don't have any known good devices plugged into the UNIBUS, it's hard to select among these possibilities. Do you have any other UNIBUS devices (other than the Tk controller) you can plug in? Also, just for grins, you could try reading addresses 17777730-34, which are registers on the KTJ11 itself, and see what you get. Noel

9 years, 1 month

PDP-11/94-E

by jnc＠mercury.lcs.mit.edu

> From: Rod Smallwood > Needless to say all of the locations I examined came up filled with > zeros. Device registers will be in the range 17760000-17777776 (although toward the top you'd mostly see CPU registers). The RX02 controller (RX211) should be at 17777170-6. > Although the monitor display says Unibus system. I suspect what I have > is a CPU used in a Qbus system with a hacked monitor and boot eprom. Hmm. Well, the same physical board should work in either system (/93 or /94) - and I suspect the ROMs check to see if there's a UNIBUS adapter (KTJ11) there, and declaim the CPU board as a UNIBUS or QBUS, depending. (I.e. I would wonder if there are separate QBUS and UNIBUS ROMs.) That's because I have this bit set that there aren't separate /83 and /84 versions of the KDJ11-B for the two busses, and I would think that the /93 and /94 would likely be the same. (I should read the -B and -E manuals to confirm that.) And I don't think there are separate part numbers for KDJ11-E's for QBUS (/93) and UNIBUS (/94) systems. But I'm not familiar with the ROM contents, so I can't say for sure. When debugging broken hardware, I tend to ignore boot/diagnostic ROMs anyway, and stick to simply what the hardware does (as seen via ODT), as that's a) much less complex, and b) fully documented. (I don't know of any ROM listings, and I'm not about to disassemble them!) So if you can't see the RX211 registers from ODT, let me know, and we'll figure out what to try to see if the KTJ11 is working properly. > For whatever reason they managed to disable the unibus I/O I'm not sure you can (in hardware terms, that is - and clearly if there's no way to do it in the hardware, the software cannot do so)... although it could be broken. > I have what I believed is a working 11/83 in my computer room > I'm going to try my processor in there There's a section in the /94 maintainence manual (EK-PDP94-MG-001, available online) about upgrading an -11/84 to an -11/94; you might want to read that to see if there are any gothca's in terms of the cabling, etc. (The console cabling will be an issue, of course, since the KDJ11-B and KDJ11-E use different console connectors on the board - I'm talking about the other cables.) But AFAIK the KDJ11-E (/93 and /94) is a compatible upgrade to the KDJ11-B (/83 and /84), so your plan should work. Noel

9 years, 1 month

2 x Sparcstation LX and Ultra Enterprise 2 available in Sweden.

by stark＠mit.edu

On 3 Jun 2016 10:55 am, "Mattis Lind" <mattislind at gmail.com> wrote: > > The location is Sweden. Isn't Sweden kind of a big place?

9 years, 1 month

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test-drb June 2016