On Fri, 11 Mar 2016 23:17:52 +0100, Peter Graf wrote: > .../... > > No chance to get a "larger" (i.e. with more gates) CPLD that would fit > > the same socket ?... Or perhaps by using a modern and larger (in both > > size and number of gates) CPLD that would piggy-back on the old CPLD > > socket via a small adpater printed circuit ?... > > I have considered that, but adaptors which fit into PLCC are > prohibitively expensive and hard to get.
Well, the mod could also involve unsoldering the PLCC (correct me if I'm wrong but IRC, it's a through-holes one) and replacing it with pinheads, for example, that would plug into the add-on board. > > A native 800x600 resolution would be a definitive (and probably the > > best) solution to the problem, so I think it would be worth investigating > > some more its feasability... > > Still 800x600 would require change of all three operating systems These are extremely *minor* and *easy* changes (and SMSQ/E can already cope with 800x600 screens)... > and several pieces of application software! Moreover, software that directly > writes into QL 512x256 would fail, like the beloved QL Chess. Frankly, such old pieces of software are probably best ran from emulators if they can't cope with variable size/address display... They would also fail to run on a QXL in (S)VGA mode or on an Aurora/SGC system too. I won't call this an issue and I think this kind of "incompatibility" should not limit and forbid us to get a better Q60 display... > .../... > > However, another issue with this solution could be the lack of room to > > piggy-back a daughter board on the EPROM slots, especially with the 2 > > ISA slots occupied and a heat-sink+fan on the 68060... > > It depends. Using SMD components, the board could be about as small as > the ROM socket area. In this case, I think it's still worth a solution... > Q68 runs about QXL speed, even without the cache I am working on. Not bad at all. > Features > > - Plain 68000 core, 68020 nearly complete > - 32 MB SDRAM > - PS/2 keyboard and mouse > - Two fullsize SD card interfaces > - SER > - Ethernet > - Battery buffered RTC (and yes, the battery is separate!) :-D > - Stereo sound > - Up to 1024x768 VESA VGA, QL modes in hardware > - 8x10 cm board size, fitting existing nice case > - Single 5V power supply > > I demonstrated my Q68 at the "QL is 30" show, where someone took a picture: > > http://www.qlforum.co.uk/viewtopic.php?f=12&t=1087&start=10 > > Meanwhile I replaced the wired components you see on that picture by SMD > for machine manufacture. QDOS Classic and Minerva are running, but > issues with QL-SD driver and Pointer Environment. Sounds and looks good... The small size would make it an ideal "portable" QL... Thierry. _______________________________________________ QL-Users Mailing List
