Search found 342 matches

by Nasta
Fri Feb 24, 2012 10:23 am
Forum: Hardware
Topic: RFC: QL interim project - Peach Keen Dimm 2-A
Replies: 17
Views: 5947

Re: RFC: QL interim project - Peach Kinn Dimm 2/A

@Nasta: Very nice ideas, but I don't think you have noticed stated mission of the machine. I thought that naming it by Slavic god of simplicity would explain everything... :mrgreen: Actually I missed the 3.3V compatibility issue and that is, indeed, an issue, especially interfacing to modern chips....
by Nasta
Thu Feb 23, 2012 1:52 am
Forum: Hardware
Topic: RFC: QL interim project - Peach Keen Dimm 2-A
Replies: 17
Views: 5947

Re: RFC: QL interim project - Peach Kinn Dimm 2/A

@Dave: WRT to CPU speed: non-waiting 68000 should be on average 60% faster than 68008. But with QL's heavily braked 68008 this is more likely 100% or even more. So 68000 at 32MHz might well feel 10-times faster, if not more. And with SEC version, there is a good chance that ti might work even signi...
by Nasta
Wed Feb 22, 2012 12:35 pm
Forum: Hardware
Topic: Schematic and ROM for floppy interface ?
Replies: 3
Views: 1908

Re: Schematic and ROM for floppy interface ?

WD 2793 chip was used by the Micro Peripherals interface, someone whould have a BIN file to burn a ROM with. The tricky part is the schematic - I reverse-engineered mine a long time ago, and have no idea where all those old QL papers are now... the original software does not support HD even though t...
by Nasta
Wed Feb 15, 2012 2:09 pm
Forum: QL Emulation
Topic: Native 68k vs Coldfire vs FPGA vs recompilation ?
Replies: 15
Views: 8525

Re: Native 68k vs Coldfire vs FPGA vs recompilation ?

OK. This is getting tedious to read, so to summarize for further reckoning: WRT to QL TNG: 1. Emulation of original QL seems nonsensical. Even if needed, we already have PC for this. Not entirely, depends on what you want to achieve. Looking at the QL as a 'personal computer' it is largely nonsensi...
by Nasta
Wed Feb 15, 2012 1:40 pm
Forum: Software & Programming
Topic: PCB design software for QL...
Replies: 8
Views: 4505

Re: PCB design software for QL...

Yes, Talent PCB1... to be honest i don't remember what PCB2 was, but I seem to remember using both. Actually, it was a rather usable program, a friend of mine did some hardware for his BSC. thesis with it. It was a very simple cell-based PCB design program but it had some slever options I would glad...
by Nasta
Wed Feb 15, 2012 12:47 am
Forum: Hardware
Topic: Faster/wider CPU...
Replies: 134
Views: 33055

Re: Faster/wider CPU...

Stupid question... Why can't I provision 16-bit memory for the video memory etc and just have the video take the bottom 8 bits? The top 8 bits would be invisible, no? Alternatively, the video memory could be read out by a new 16-bit video system that gave VGA-compatible or better output? Flash woul...
by Nasta
Tue Feb 14, 2012 9:22 pm
Forum: Hardware
Topic: Faster/wider CPU...
Replies: 134
Views: 33055

Re: Faster/wider CPU...

The EC and HC variants both do that. I can, however, obtain EC variants for less than half the cost of a similarly clocked HC. I'm curious if there's a simple way to have a faster CPU than the 7.5MHz of the 68008, and/or if there's a simple way to have wider memory accesses, and still use the onboa...
by Nasta
Tue Feb 14, 2012 6:30 pm
Forum: QL Emulation
Topic: Native 68k vs Coldfire vs FPGA vs recompilation ?
Replies: 15
Views: 8525

Re: Native 68k vs Coldfire vs FPGA vs recompilation ?

On ARM conditional instruction execution Actually, nothing is lost except perhaps code space to encode instructions in, and it does have some rather interesting ways of simplifying code. I don't see how "nothing is lost". Dead instructions still have to be decoded, if nothing else. So, you...
by Nasta
Tue Feb 14, 2012 12:53 am
Forum: QL Emulation
Topic: Native 68k vs Coldfire vs FPGA vs recompilation ?
Replies: 15
Views: 8525

Re: Native 68k vs Coldfire vs FPGA vs recompilation ?

And even if you take look at ARM- based microcontrollers in that price range, they all seem to be M3 or somesuch, with operating frequencies in 20-50 MHz range. This shouldn't be tough to reach even in small FPGA... If one would do a FPGA implementation, it would be simpler to actually implement a ...
by Nasta
Tue Feb 14, 2012 12:39 am
Forum: QL Emulation
Topic: Native 68k vs Coldfire vs FPGA vs recompilation ?
Replies: 15
Views: 8525

Re: Native 68k vs Coldfire vs FPGA vs recompilation ?

@Nasta: So, you are alive and ( hopefully) well . :P Well, I'll take that as good wishes as I may be alive, but simple words like well don't even scratch the surface of how I am, so let's just say I'm reasonably Ok and leave it at that :) WRT to ARM- just as an inquiry - what do you think about its...