On Mon, Sep 16, 2013 at 4:01 AM, Peter <[email protected]> wrote: > > How to get connected to the CPU bus is always the biggest problem with the > original QL, as using extension bus makes things big and ugly. > > Using ROM slot takes away write access. And simulating writes with address > lines is not something one would want while debugging an ethernet device. > > I gathered something was wonky with that ROM slot after following Adrian's progress. Now I know, thanks.
Is a socketed approach possible? I'm thinking the AdIDE and AdSpeed stuff so common for Amigas and Atari ST back in the day. I honestly don't know off the top of my head whether the CPU was always socketed so pardon me if it usually isn't. > Maybe the best approach is to make something "big and ugly" first, get > things working, and then go for the more difficult ROM slot approach, if > there is still time and interest left. > Especially if "big and ugly" means less complicated for someone with my meager hardware skills. > > Should you (or anyone else) decide to actually use the CP2200, I could > contribute a little PCB design with the complete ethernet circuitry und > RJ45 connector, bringing address and data bus lines to an easy to solder > connector. > > I have designed that already for the Q68, it would take only a few hours, > as long as I don't have to buy anything or give explanations. (Warning: > The CP2200 comes in a TQFP package with 0.5 mm pitch. Not impossible to > solder, but not easy.) > If you could share that that would be great and probably save me 10x the time since I can *maybe* solve the logic and bus issues but not the physical and line quality issues (e.g. filtering and the discretes). > > > I don't have a GC or SGC, but I do have a QXL I could use for > > compilation and I'll look into putting together a build/test station. > > For compilation you could also use Jonathan Hudson's XTC68 cross compiler > for the PC. > Looking into that now, thanks. _______________________________________________ QL-Users Mailing List http://www.q-v-d.demon.co.uk/smsqe.htm
