Search found 40 matches

by mfro
Mon Jun 29, 2020 5:56 pm
Forum: CHAT FORUM
Topic: Need for an MMU in an 030?
Replies: 13
Views: 256

Re: Need for an MMU in an 030?

exxos wrote:
Mon Jun 29, 2020 11:03 am
So I load my favourite port of bombjack or whatever on a 030 CPU, what advantages does the MMU give ?
Nothing, probably. But if you don't need an MMU, you probably also don't need a '030. Makes the question somewhat obsolete (and saves you a whole lot of money :lol: ).
by mfro
Mon Jun 29, 2020 8:58 am
Forum: CHAT FORUM
Topic: Need for an MMU in an 030?
Replies: 13
Views: 256

Re: Need for an MMU in an 030?

On an ATARI compatible, at least when using the full 32 bit address range (i.e. with fast RAM), you'll most likely need the MMU to map in the I/O-addresses to both the end of the 24bit address space as well as to the end of the 32 bit address space.
by mfro
Mon Jun 15, 2020 7:00 am
Forum: MONGREL H4 USER BUILDS
Topic: Smonson's slow H4 build
Replies: 94
Views: 4514

Re: Smonson's slow H4 build

... Well I originally saw reporting that Canonical had dropped support for 32-bit support libraries with this release, but google says they changed their mind, which is great news to me! https://ubuntu.com/blog/statement-on-32-bit-i386-packages-for-ubuntu-19-10-and-20-04-lts The 32bit libraries are...
by mfro
Sun Jun 14, 2020 2:02 pm
Forum: MONGREL H4 USER BUILDS
Topic: Smonson's slow H4 build
Replies: 94
Views: 4514

Re: Smonson's slow H4 build

Unfortunately 12.0sp2 is the last version for cyclone-2. It's a 32-bit application and that's the reason why the new Ubuntu can't run it. I can still run it on Windows actually - I didn't even think about that when I first mentioned it - probably because using Windows for software development is ev...
by mfro
Sun Jun 14, 2020 8:54 am
Forum: MONGREL H4 USER BUILDS
Topic: Smonson's slow H4 build
Replies: 94
Views: 4514

Re: Smonson's slow H4 build

... Unfortunately Quartus 12 no longer runs on the latest Ubuntu and I don't have enough laptop disk space to install another OS so that's a bummer, I will be constantly walking between my PC and the other room to try stuff. A very annoying decision on Intel's part for taking Cyclone-II support out...
by mfro
Mon May 25, 2020 8:27 pm
Forum: SOFTWARE
Topic: FPGA clock gen ?
Replies: 4
Views: 1741

Re: FPGA clock gen ?

exxos wrote:
Mon May 25, 2020 5:02 pm
@mfro So what would you suggest for doing the job ?
What I've shown above should do it just fine.
by mfro
Mon May 25, 2020 2:38 pm
Forum: SOFTWARE
Topic: FPGA clock gen ?
Replies: 4
Views: 1741

Re: FPGA clock gen ?

Do any FPGA coders here know how to program this up.. I assume it would be simple. I want to take something like 100MHz clock input and use it to count variables in the FPGA. If I want to create say 25Khz clock (but many clocks which are not divisible also!) , I would have something like.. VAR1.CK ...
by mfro
Fri Apr 24, 2020 3:03 pm
Forum: SOFTWARE PROGRAMMING & DISCUSSION
Topic: Getting screen base address ?
Replies: 4
Views: 245

Re: Getting screen base address ?

Assuming by what you've shown in the other thread: if you do a GEM application, there is probably no reason to deal with the screen address at all.

What do you need it for?
by mfro
Fri Apr 24, 2020 3:01 pm
Forum: SOFTWARE PROGRAMMING & DISCUSSION
Topic: Clear screen to the green background ?
Replies: 14
Views: 652

Re: Clear screen to the green background ?

thorsten.otto wrote:
Fri Apr 24, 2020 2:44 pm
It is WF_NEWDESK, not WF_DESKTOP.
Good, old - and buggy - Atari Compendium. Right you are, it's WF_NEWDESK. Thanks.
by mfro
Thu Apr 23, 2020 7:51 pm
Forum: SOFTWARE PROGRAMMING & DISCUSSION
Topic: Clear screen to the green background ?
Replies: 14
Views: 652

Re: Clear screen to the green background ?

I can use v_clrwk to clear it, but it turns the screen white. Is there a way to restore the green background GEM colour ? This happens when you don't obey the stacked nature of GEM. If you use the "top of stack" AES (as you apparently do with the dialog box) you are supposed to use the VDI only ins...

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