exxos's Atari, Amiga & retro forum

mrbombermillzy wrote: 28 Jun 2025 23:20 Another cool option would be insanely high clock rate MC68000s. That would be cool. (I know you can do it @exxos ) :D

I wonder if watercooling and overvolting would get >75Mhz? :lol:

Already done but to many projects and not enough time.. But slapping on a fast cpu isn't going to help much. It needs a faster bus which is where I want the H5 Phoenix project to go.

But getting to far off topic now and I've already wrote loads about it all :)

viewtopic.php?t=6070

mrbombermillzy wrote: 29 Jun 2025 09:14 @dml That sounds about right. :)

I do vaguely remember the MOVE16 instruction being handy.

dml wrote: 29 Jun 2025 01:02 I'll need to fire up my Afterburner and get some measurements to compare. It's a 32/40MHz system but a decent ratio can be figured out from that :)

That would be interesting. The 040 doesnt really get much attention nowadays.

The 040 is a rare and mythical machine in the Atari world which was a great shame.

Theoretically the 68060 can run at 4x clock speed, so 25/100 is possible. I've no idea if it could be done or if it would work.

I wonder though.. While caches improve speed as the cpu doesn't have to read slow RAM as often.. But if you had a 50mhz bus with a 50mhz CPU.. What's the speed gain of caches then?

I'd assume it still be a gain as the cpu doesn't have to do full bus cycles to get data.

I'm just thinking that the faster the bus is the less effective caches become.

exxos wrote: 29 Jun 2025 12:08 I'm just thinking that the faster the bus is the less effective caches become.

That is the case, yes. The gain depends on the waitstates for the external memory. There are some other factors which make the CPU cache faster - it's on the die and part of the execution pipeline after all and is checked before it decides to begin an external bus transaction - but the gain will be a lot less if external ram is 0 waitstates @ 32bit.

exxos wrote: 22 Jun 2025 12:29 I did find one of the simm sockets looked iffy. Changed it for the wrong angled type :( I need to send my graphics cards to @PhilC to try in his Raven soon. IIRC I had 4 but only 2 worked and think it was @Zogging Hell I sent them to. But it was such a long time ago and the conversation long lost.

Just to confirm Exxos, it wasn't me you sent the graphics cards to, we did have a brief conversation about your Milan (iirc it was something to do with the manual and dip settings). I think I still have the conversation somewhere, but it was on my old tjw@zhell.co.uk email address, which I lost with the domain name when it was snatched. If I can find which ancient PC the messages were stored on I'll forward it back to you.
Glad to see your having another go at this though :)

Zogging Hell wrote: 20 Jul 2025 12:13 Just to confirm Exxos, it wasn't me you sent the graphics cards to, we did have a brief conversation about your Milan (iirc it was something to do with the manual and dip settings). I think I still have the conversation somewhere, but it was on my old tjw@zhell.co.uk email address, which I lost with the domain name when it was snatched. If I can find which ancient PC the messages were stored on I'll forward it back to you.
Glad to see your having another go at this though :)

Thanks for letting me know. Was sure it was you but was a longgggg time ago.. No need to send anything. I can test the cards now my Milan boots anyway now :)

The new chip and socket arrived. But it's been to hot to even think about soldering the new chip currently..

exxos wrote: 20 Jul 2025 12:17 Thanks for letting me know. Was sure it was you but was a longgggg time ago.. No need to send anything. I can test the cards now my Milan boots anyway now :)

The new chip and socket arrived. But it's been to hot to even think about soldering the new chip currently..

Don't blame you, here in Brittany it went from winter to summer overnight skipping spring completely and we have been sweltering since May. Too hot to do anything but hide and eat ice cream! Sadly I have a house to rennovate...

Zogging Hell wrote: 20 Jul 2025 12:58 Don't blame you, here in Brittany it went from winter to summer overnight skipping spring completely and we have been sweltering since May. Too hot to do anything but hide and eat ice cream! Sadly I have a house to rennovate...

That sucks. Yeah it's been peeking to 31c in my room. My router died Friday night :( I've got a new one coming tomorrow. But I think the thing just overheated and died. So I'm not expecting the new router to fair up any better :(

I've split @peters posts into his own thead here viewtopic.php?p=138034#p138034