I have an H11 but not an H27 controller. The story I remember reading is that it ran a modified and incompatible RT11 because DEC didn’t want to cannibalize sales on the inexpensive PDP-11’s. I have a write up about this on my web site.
I can say that it does indeed run real RT11 if loaded with a TU58 emulator or if using SCSI (like with an Emulex card and SCSI2SD). A second SLU is needed for the TU58 of course. I ran a DLV11J on mine. Rich http://www.classiccmp.org/cini Long Island S100 User’s Group Get Outlook<https://aka.ms/qtex0l> for iOS ________________________________ From: cctalk <cctalk-boun...@classiccmp.org> on behalf of Bill Gunshannon via cctalk <cctalk@classiccmp.org> Sent: Monday, December 28, 2020 8:18:04 PM To: cctalk@classiccmp.org <cctalk@classiccmp.org> Subject: Re: Does anyone have an H11 and need a H27 card? -spam On 12/28/20 7:07 PM, ben via cctalk wrote: > On 12/28/2020 4:43 PM, Bill Gunshannon via cctalk wrote: >> On 12/28/20 6:37 PM, ben via cctalk wrote: >>> On 12/28/2020 4:23 PM, Kevin Lee via cctalk wrote: >>>> Remember. >>>> >>>> Wherever you go...... >>>> >>>> There you are ....... >>>> >>> What about the Invisible Man? >>> Ben. >>> >>> >> >> >> All joking aside, I sure wish I had a complete H-11. I have >> PDP-11's but the H-11 was unique. >> >> You know, it would be even cooler sitting next to an H-8. >> >> Too bad so few seem to have survived. >> >> bill >> > I suspect it was more the case of too few were purchased. The high price > of the H-11 must have been a factor. Was the H-11 cpu crippled for Heath > Kit? I wished for one at the time, but was there any application software? > Ben. As far as I knew it was a real DEC CPU Module. I expect any application that ran on RT-11 on the LSI-11/02 would have run on the H-11 but then, you couldn't just walk into your local computer hobby shop and by RT-11 software. :-) bill
