On Sun, Nov 5, 2017 at 12:43 PM, Aaron Jackson via cctech < cct...@classiccmp.org> wrote:
> Hi everyone, > > I have managed to hook up an RL02 drive to my PDP-11 (thanks to Dave > Wade for the drives) . This took me longer than I thought it would - I > tried with a flat ribbon cable with a DIY terminator going straight into > board , but couldn't get it to work. Removed the terminator, and the > fault light turned off. So that's positive. > > I tried to load a cartridge, which I had cleaned, inspected and > generally appears to be in good condition. It started to spin up and I > could hear it getting faster, but after 30-40 seconds the fault light > returns. I made a short video demonstrating this: > > https://www.youtube.com/watch?v=japwBBodO8U > > According to the manual the fault light can appear for the following > reasons: > > - Drive select error... Surely this would come on at the start? > - Seek time out error... I'd have to hear the heads move first > - Write current in heads during sector time error... Same as above > - Loss of system clock... The fault light would be on from the start. > - Write protect error... I don't think it got that far > - Write data error... Same as above > - Spin error... Is this the only remaining fault? > > So could the only cause be a spin error? I am wondering if the belt is > slipping or something like that? > > Can anyone offer some advice? > > Thanks, > > Aaron. > At that point, for the time it takes the drive to be ready from a load should be about 15 seconds. For you the Fault light comes on instead. If I turn on my drives but leave the computer (11/40) off, the fault light comes on immediately. If I then turn on the computer the fault light will turn off, although I may have to press load first and if so it will turn off after a few seconds. It's independent of the LOAD/READY lights based on this informal comparison I'd venture you have a drive issue. I am not 100% sure what your termination situation is. I have two drives, one terminated but it's with a DEC terminator on the bottom port of drive 1. The cable comes from the computer into drive 0. I have a cable going from drive 0 port 1 to drive 1 port 1. Bill
