> Pete Turnbull via cctalk writes: > >> On 21/09/2021 20:34, Chris Zach via cctalk wrote: >>> Can an MXV11 be used in a 22 bit system? I thought it was an 18 bit >>> device? >> >> MXV11-B is 22-bit. MXV11-A is 18-bit but supposedly can be used in a >> 22-bit system if the RAM is disabled. > > Yeah this is a 22 bit card. Josh sent me an xxdp image which I could > easily boot from my scsi2sd (thanks!). Seems to be reporting an error > with the CPU unfortunately: > > ]] .R ZKDJ?? > ]] ZKDJB2.BIC > ]] > ]] ERROR WHILE TESTING BOARD FUNCTIONS > ]] ERROR # =001166 > ]] ERROR PC =040662 > ]] 043632 > > This happens regardless of whether W9 is installed or not (supposedly > disables the LTC register on the CPU?) > > I'll see if I can borrow another CPU card form a friend this > weekend. Unless anyone else has any ideas? Another suggestion on IRC > was to disable the PSU LTC and enable the LTC on MXV11 but will need to > look up some details on how to do this. > > Thanks, > Aaron
Probing the BEVENT line and it was 50hz etc, but then I realised it wasn't actually the right voltage. Replaced a transistor and now it boots! Cheers, Aaron