Is that 14MHZ or the 2x7.5 MHZ of the original ? I had the 68020 working well at that and double again...i.e. Synchronous The length of the 68K bus been dragged out of the DIN connector at the end is getting to be a issue especially as a wire wrap. I personally don't think any of your code is actually been run is 32 bit static RAM just still in the old stuff.I think you will get an even better improvement if you force code to be there.
If I still have it I'll post a pic of a bright GOLD (bumper paint is cool) QL with a wire wrapped 68020 in the side.. Should be a blast from the 80's And yes I would be very interested in seeing your work... regards John A PS....anyone fiddling with the 68881? --- On Sat, 9/3/13, Dave Park <[email protected]> wrote: From: Dave Park <[email protected]> Subject: Re: [Ql-Users] [QL-Users] Something I have been playing with... To: [email protected] Date: Saturday, 9 March, 2013, 17:09 I shall do it, eventually. Meanwhile, I am very interested in the 68020 adapted Thors. Does anyone on-list have one? Mine's a Thor XVI (with video issues, but that's another thread) so it just has a 68000@8MHz, though I am working on an upgrade for that, too :) Dave On 3/9/13, Ian Burkinshaw <[email protected]> wrote: > Hi Dave > > Sounds interesting, I would be interested in a write up and schematic. > > Could be a good basis for QL based controller/computer. Sort of like > Raspberry Pi but without the Linux.. Just build what you need for a given > application. > > As you say nifty. > > Ian Burkinshaw > ----- Original Message ----- > From: "Dave Park" <[email protected]> > To: <[email protected]> > Sent: Friday, March 08, 2013 10:20 PM > Subject: [Ql-Users] [QL-Users] Something I have been playing with... > > > Hi all, > > Mostly copied over from qlforum.co.uk, so if you read it there, sorry for > the redundancy! > > Today I ran a loop on an unexpanded QL in monitor mode (US model, has weird > interrupts) and then with a 68EC020, a GC and a SGC. > > 100 PRINT DATE$ > 110 FOR loop = 0 to 100000 : NEXT loop > 120 PRINT DATE$ > > It's a good timewaster. It just moves things around, takes a certain amount > of time. > > Machine Time > Bare QL 2m17s > My 14MHz EC020 1m01s > My 020+RAM 0m39s > Gold Card 0m29s > Super Gold Card 0m12s > > > My first line is an MC68EC020 running just pure QL hardware. I can't get it > reliable above 14MHz so that was the speed for the test. > > My second, faster line is with 512MB of 16-bit SRAM added, and a simple PAL > address decoder that allows the 020 to access the memory in its native > width. > > Rounding off, with QL = 1, basic 020@14MHz = 2.3, 020+RAM = 3.5, GC = 4.8, > SGC = 12.5 > > So I have a little way to go, I think. However, 2.3x achieved by around £40 > of components is... nifty. > > If this gets people wildly excited, I'll write up a how-to and a schematic > > Dave > _______________________________________________ > QL-Users Mailing List > http://www.q-v-d.demon.co.uk/smsqe.htm > > > _______________________________________________ > QL-Users Mailing List > http://www.q-v-d.demon.co.uk/smsqe.htm > _______________________________________________ QL-Users Mailing List http://www.q-v-d.demon.co.uk/smsqe.htm _______________________________________________ QL-Users Mailing List http://www.q-v-d.demon.co.uk/smsqe.htm
