Chris, if I had that ESDI drive I could at least get a system onto the machine to explore further! Where are you? Could you mail it to me in Toronto, Canada? How much moolah do you need to do this? cheers, Nigel Johnson, MSc., MIEEE, VE3ID/G4AJQ/VA3MCU Amateur Radio, the origin of the open-source concept! Skype: TILBURY2591 nw.johnson at ieee.org On 16/08/2020 15:16, Chris Zach via cctalk wrote: > Don't know much about the Dilogs (other than there were tape and disk > versions) but ESDI disks can still be found on Ebay, I have a spare > 150mb drive if you need it. They are quite quick all things > considered, and some of the ESDI controllers had pretty good hardware > acceleration features in addition to block and burst mode DMA. > > C > > (running 327mb ESDI disks on my 11 and am very happy with performance) > > On 8/16/2020 11:24 AM, Nigel Johnson via cctalk wrote: >> I'm getting back to trying to restore my MicroVax II.? Existing >> controllers are ESDI and MFM, disks hard to find. >> >> So I would like to convert a brand-new DQ703 I have to SQ706 so I can >> mount SCSI disks. >> >> I understand it is just? a prom change. >> >> Does anybody have any info, or perhaps a PROM image? >> >> cheers, >> >> Nigel >>

On Sun, Aug 16, 2020 at 8:24 AM Nigel Johnson via cctalk <cctalk at classiccmp.org> wrote: The two Dilog SQ703 and SQ706 boards that I have are not physically identical. One has a SCSI bus driver daughter board and the other does not. I don't know if the firmware is swappable between the two. I never got around to trying that before the TMSCP board died. The MSCP board still worked fine the last time I used it. I also have a couple of the later SQ3703 and SQ3706 S-handle versions of the boards. On those I did swap the MSCP firmware into the TMSCP board and it then worked fine as an MSCP version.