Moderators: Mug UK, Zorro 2, Greenious, spiny, Moderator Team
exxos wrote:IDE ports is interesting, but there are already kits for that, this project would need new software and hardware to work with fast-ram.
exxos wrote:Flash ROM is possible, but also have to remember each time something is "added" cost will be going up. The ROM is in a PLCC, so anyone can program a new chip with what ever they want anyway.
qq1975b wrote:Here you can see a Mega ST motherboard: http://www.atari-wiki.com/images/9/9b/Mega_4.jpg
All revisions are the same (only TOS configuration may change between 2 and 6 chips). Maybe your design is already compatible with it? Just if it doesn't affect the Mega bus it would be Ok. The Mega bus cards face always back to the Mega ST.
Probably the blitter patch have to be taken out...
joska wrote:exxos wrote:IDE ports is interesting, but there are already kits for that, this project would need new software and hardware to work with fast-ram.
Not sure what you mean by that. I would think that when you already have a CPLD you'd only need an IDE connector and a buffer/driver to add IDE? Or maybe you need a bigger CPLD for that?exxos wrote:Flash ROM is possible, but also have to remember each time something is "added" cost will be going up. The ROM is in a PLCC, so anyone can program a new chip with what ever they want anyway.
Again, not sure if I understand. You're already adding a "big" EPROM and logic to switch "banks" and support 2.06. You already have a CPLD for the necessary logic. What else do you need to use flash EEPROM? Remember that most users don't have EPROM programmers. I think it would be very useful to have this feature, e.g. to put MagiC in flash.
exxos wrote:There isn't a problem of adding stuff to ports, we have around 80 ports to play with, around 50 are spoken for with current stuff. What I wanted was the IDE to have the option to load and run in fast ram. IDE is normally directed to ST RAM which is slower. We can't just copy paste code into this project to add IDE, and IDE will have to support fast ram and higher speeds also.
Cyprian wrote:why not 68030? it's much better than 020. e.g. it has data cache which would compensate a slow access to ST-Ram.
Cyprian wrote:why not 68030? it's much better than 020. e.g. it has data cache which would compensate a slow access to ST-Ram.
exxos wrote:the 020 is 99% ish compatible. I think there was some instructions missing from it, though be what I have read, not much software used it anyway (I guess its why motorola took it out).
joska wrote:exxos wrote:the 020 is 99% ish compatible. I think there was some instructions missing from it, though be what I have read, not much software used it anyway (I guess its why motorola took it out).
IIRC there's some differences to the stack frames too.
exxos wrote:
Rodolphe has been busyThough unfortunately we cannot route the SRAM chips on this board. It is already 4 layers and we still cannot route it. So rather than going to 6 layers we have decided to add a expansion bus to the card instead. This way, the alt-ram will just be a optional plug in board. I think having a expansion bus is a better idea as it allows future expansions to be done. Of course if anyone wants to develop their own expansion kit to work with 16mhz CPU then they are free to do so
GadgetUK164 wrote:I know I've mentioned it before but have you looked at the MACH 16 stuff on this site?
GadgetUK164 wrote:That's awesome! I love the idea of expansion RAM - take my money lol! I don't suppose its possible to squeeze a math co processor onto the RAM expansion board as well? I want my cake and I want to eat it, and it has to have extra chocolate pieces and whipped cream lol
joska wrote:I had a 68881 in my Mega STE about 20 years ago and it was of very little use. POV-ray would render a picture in hours instead of days, but that's it.
Users browsing this forum: No registered users and 2 guests