ZN wrote: >>> The SGC can actually access the Aurora ROM chip proper... what is >>> unclear is if it can also generate write cycles on the bus for those >>> addresses. >>Can't one see that in the chip code Keith has recovered? > YES!
So didn't you get them? I had a brief look at them ages ago and had the understanding that they're on their way to you. > 1) CPU > a) 68k (semi)compatible or an alternative - the latter requiring a complete > re-write of nearly everything or at least a very capable emulator. I don't see much use in an alternative CPU. In that case better get a cheap PC and get some emulator whose name just slipped my mind. > b) 68060 or Coldfire - 68060 being the obvious compatible choice (and > besides, it's already been done so certainly possible), but suffers from > obsolescence, even though it is still obtainable on second-hand markets for > reasonable prices. Coldfire has the semicompatibility problem. You probably just have to wait another few months and they'll get completely compatible again ;-) > 2) Format > a) PC influenced or industial - in other words, uATX (flexATX or ITX) or > Euro/halfVME. The first is the logical choice for the standard user, but > cumbersome for embedded systems, the latter exactly it's oposite. Just my feeling, but I'd opt for small and something like a Euro card. The ATX/BAT market is already served by the Qx0. I'm not your potential customer though and as thus don't count. > b) Fully integrated or expandable, contingent on the choice made in 2a > above - for uATX/flexATX/ITX fully integrated with minimal expansion (say > one slot of some kind) is the most logical, but also fairly costly solution > (you have to buy things you may not necessairly need as they are already > integrated on the board), Does it make that much difference price wise? > It is equally possible and even simpler to put all the required circuits > onto a flexATX size board (flexATX is that part of a regulap PC ATX > motherboard that has the serial, parallel, USB, keyboard, mouse and sound > connectors), Roughly 23 x 19cm, I gather. > Given that resources are limited, should the 'small steps' approach be used > with the time between steps (developement time for parts of the total > system) reduced, or should one 'Quantum Leap' be attempted with the > associated long wait for everything to gel together includinmg all the > required resources? Hm, beats me. Marcel _______________________________________________ QL-Users Mailing List http://www.q-v-d.demon.co.uk/smsqe.htm
