That's 14 MHz. I can't get it to boot at all at 15MHz. I found it would boot well at some frequencies but crash, or not boot at all at others. I haven't tried the native 24/25MHz yet.
I don't have a 68881 to fiddle with, but if I did QDOS wouldn't make any use of it would it? Dave On Sat, Mar 9, 2013 at 12:52 PM, John Alexander <acontractor...@yahoo.co.uk>wrote: > 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 <plasticu...@gmail.com> wrote: > > From: Dave Park <plasticu...@gmail.com> > Subject: Re: [Ql-Users] [QL-Users] Something I have been playing with... > To: ql-us...@q-v-d.com > 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 <ian.burkins...@btopenworld.com> 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" <plasticu...@gmail.com> > > To: <ql-us...@q-v-d.com> > > 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 > _______________________________________________ QL-Users Mailing List http://www.q-v-d.demon.co.uk/smsqe.htm
