Am 16.03.2013 um 21:37 schrieb Dave Park: > Okay, that fits my experience. > > What I'm getting with JS is it boots okay, and I can type and press enter. > Most commands work. Attempting to write or run any SuperBASIC causes a > freeze. Accesses to mdv#_ cause a freeze. > > With Minerva, I can enter a SuperBASIC program and run it, but any of the > rest above causes a freeze. > > My board uses a 16-bit wide image in flash, which is a LOT faster than the > 8-bit one. The video RAM is still 8-bit though, which is the main > bottleneck. This is purely for compatibility with the old QL custom logic. > > Next, I'd like to implement the standard QL expansion port on it. > > It's pretty neat. It's nearer GC than SGC speed right now but I'm working > on that.
Dave, forgot to mention that the QL ROMs (both original and Minerva, SMSQ/E as well in case that matters) contain hard-coded timing loops in their networking, serial and microdrive code. Some (if not most) of those loops will fit into the 68020's instruction cache and would definitely need to be re-calibrated to your hardware. No wonder it freezes. Regards, Tobias _______________________________________________ QL-Users Mailing List http://www.q-v-d.demon.co.uk/smsqe.htm
