All — I just hit on an anomaly with my H-11 so I wondered if there was anyone on-list with experience with the H-11, although it crosses-over to DEC. In short, I added an Emulex SCSI card and SCSI2SD to my H-11 so I could run RT-11. The TU58 emulator was way too slow. RT-11 won’t boot with the LTC enabled, and the Emulex manual specifically says it should be disabled at the CPU card. But, I want to run Kermit (to enable easier file transfers rather than dd’ing a new image to the SCSI2SD each time), and Kermit for the PDP-11 requires the LTC. The H-11 comes in two versions – one with an LTC switch and one without. Mine doesn’t have the switch, but one was added, performing the same function electrically (grounding the base of the transistor driver to the BEVENT signal). If I put a counter on the BEVENT pin, I get 60Hz with it enabled and 150Hz with it disabled. This is the anomaly I wanted to check out with any other H-11 owners. Alternatively, if anyone knows of a file transfer program for RT-11 (SJ, FB monitors only) then maybe that’s an option. I’ve seen an XMODEM program but it uses TSX. Thanks! Rich -- Rich Cini http://www.classiccmp.org/cini http://www.classiccmp.org/altair32
RT-11 won’t boot with the LTC enabled, and the Emulex manual specifically says it should be disabled at the CPU card.
I would think this applies only to LTCs that can't be disabled in software -- for instance, the BDV11 has a software switch for the LTC and IIRC comes up with the LTC disabled. The Emulex card *must* work with the LTC enabled some time after boot, or it wouldn't work with 2.11BSD (and it does -- that's what I use mine for). I don't remember if the UC07 has a software-controlled LTC function, some of the other Emulex devices do. Wouldn't be hard to kludge on to the system if it doesn't. I'll dig through my QBus inventory and see what, if anything, provides a LTC without too much overlap in functionality.
Alternatively, if anyone knows of a file transfer program for RT-11 (SJ, FB monitors only) then maybe that’s an option. I’ve seen an XMODEM program but it uses TSX.
You can use the TU58 emulator for this process, it'll be roughly the same speed since you're going over a SLU in both cases. Thanks, Jonathan
Thanks Jonathan. The H11 uses the LSI-11 (M7270) which I don’t think has a soft-switch for the LTC. Rich -- Rich Cini http://www.classiccmp.org/cini http://www.classiccmp.org/altair32 On 4/19/16, 11:25 AM, "vcf-midatlantic on behalf of Systems Glitch via vcf-midatlantic" <vcf-midatlantic-bounces@lists.vintagecomputerfederation.org on behalf of vcf-midatlantic@lists.vintagecomputerfederation.org> wrote:
RT-11 won’t boot with the LTC enabled, and the Emulex manual specifically says it should be disabled at the CPU card.
I would think this applies only to LTCs that can't be disabled in software -- for instance, the BDV11 has a software switch for the LTC and IIRC comes up with the LTC disabled. The Emulex card *must* work with the LTC enabled some time after boot, or it wouldn't work with 2.11BSD (and it does -- that's what I use mine for). I don't remember if the UC07 has a software-controlled LTC function, some of the other Emulex devices do. Wouldn't be hard to kludge on to the system if it doesn't.
I'll dig through my QBus inventory and see what, if anything, provides a LTC without too much overlap in functionality.
Alternatively, if anyone knows of a file transfer program for RT-11 (SJ, FB monitors only) then maybe that’s an option. I’ve seen an XMODEM program but it uses TSX.
You can use the TU58 emulator for this process, it'll be roughly the same speed since you're going over a SLU in both cases.
Thanks, Jonathan
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Richard Cini -
Systems Glitch