On 16 Jan 2020 at 0:43, Thierry Godefroy via Ql-Users wrote: > > Those are small PLDs, optimized almost to the last gate, not FPGAs, > > and 800x600 is not doable. > > Surprising, since it's "just" a change in divisors/counters/ > frequencies, but if you say so (I'm certainly no expert in PLD/FPGA > programming).
Maybe you can look at it this way: The video controller of the Q60 squeezes _more_ functionality than a contemporary Lattice reference design, into a PLD with less than _half_ the resources. This came not only from manual optimization using every possible trick, but also at the cost of flexibility. I had to exploit constraints that are not given at 800 x 600. I clearly remember that I tried hard to implement 800x600 some time after flatscreens came up, and came to the conclusion there is absolutely no chance. > > I would find an answer to my original question interesting. > > As I already explained, the OSSC has brought to me the solution for > the Q60 (and since a 800x600 mode is ruled out, I don't see any > point in modifying it now). Thanks for clarification. If the OSSC wasn't such an expensive, clumsy setup, I would also just say: Issue solved. Period. It's very good that you published your experience - I would never spend the money without knowing that it actually works with the Q60. For the BBQL, I have a better HDMI solution, so I have no other use for an OSSC. If it has not happened yet, I would encourage you to post your result on the QL forum also. > But you'd have to ask other Q40/Q60 owners about what they would > prefer (i.e. the use of a scan converter (*), or a heavy modification > of their Qx0 to output a higher resolution compatible with modern > monitors). Or a different board that would run with the 68060 pulled out of the Q60, hence my original question. > (*) In fact, a "cut-down" OSSC (that would only be able to deal with > the Q40/Q60 and QL video modes, and with just the VGA input and no > LCD display, no remote) could be a cheaper and easier solution. Of course. And also smaller, nicer, decently cased. If not for time shortage _plus_ other priorities even for the QL hobby, that would be an intersting project. _______________________________________________ QL-Users Mailing List
