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by joska
Mon Sep 17, 2018 2:05 pm
Forum: Hardware
Topic: Phantom accelerator (by Phanatic).
Replies: 9
Views: 494

Re: Phantom accelerator (by Phanatic).

As micro said. The device is extremely simple. One 50Mhz crystal oscillator, 74F00 for 50/32Mhz switching and one 74F04 as a clock output buffre and 32Mhz to 500Hz clock divider on the main device and 74F04 + SN7404N on the clock patch. Are the schematics available? The circuit sounds very simple, ...
by joska
Mon Sep 17, 2018 9:20 am
Forum: CT60 / CT63 Area
Topic: CT60e bus accelerator
Replies: 2
Views: 171

CT60e bus accelerator

Has anybody tried to populate and use the empty bus accelerator circuit on the CT60e?
by joska
Mon Sep 17, 2018 7:43 am
Forum: Professionals
Topic: Falcon Nova Adapter ...
Replies: 24
Views: 1068

Re: Falcon Nova Adapter ...

mikro wrote:and NOVA hated more RAM anyway so you needed special hacks to disable its upper 2 MB to get the NOVA working.


I don't think any special hacks are needed, the Magnum Falcon is configured by software.

https://forum.atari-home.de/index.php?topic=11331.0
by joska
Mon Sep 17, 2018 7:02 am
Forum: Professionals
Topic: Falcon Nova Adapter ...
Replies: 24
Views: 1068

Re: Falcon Nova Adapter ...

But in falcon just cruel. All that power and no ram. So an interesting but pointless development. What if you have a Falcon with Fast-RAM? I had a Nova in my Falcon/AB years ago, but stupidly sold it when I got an Eclipse for it. The Nova was absolutely brilliant, and far from pointless. Great perf...
by joska
Sun Sep 16, 2018 7:21 pm
Forum: Hardware
Topic: STe - Bad DMA Chip
Replies: 160
Views: 26101

Re: STe - Bad DMA Chip

Yes, that is possible. Both STE's where closure and We Were fails have the "good" DMA, and (so far) all STE's where these demos works on even with the HC CPU have the "bad" DMA. If this pattern can be confirmed it's bad news for future 68000-based accelerators. But too early to ...
by joska
Sat Sep 15, 2018 4:42 pm
Forum: Hardware
Topic: STe - Bad DMA Chip
Replies: 160
Views: 26101

Re: STe - Bad DMA Chip

Like tzok, I have the purportedly "bad" DMA in my STE. However, even with the original NMOS CPU I can use my Gigafile with it without any issues. I tried hard to provoke any errors but couldn't, even though my DMA is supposed to be "bad". The "bad" DMA only has problem...
by joska
Sat Sep 15, 2018 4:31 pm
Forum: Hardware
Topic: STe - Bad DMA Chip
Replies: 160
Views: 26101

Re: STe - Bad DMA Chip

So atleast two people has successfully tested with a HC CPU . tzok has a "bad" DMA, czietz - which DMA do you have in your STE? I have the "good" DMA.
by joska
Sat Sep 15, 2018 2:50 pm
Forum: Hardware
Topic: STe - Bad DMA Chip
Replies: 160
Views: 26101

Re: STe - Bad DMA Chip

Yes please :) Edit: We Were @ - another recent trackloader - does not load with an HC installed either. It does run from harddrive (IDE), but it apparently does some crazy stuff because my LCD TV does not like it at all :D we_were_ste_hc.jpg I remember some issues with the syncscrolling parts even o...
by joska
Sat Sep 15, 2018 1:51 pm
Forum: Hardware
Topic: STe - Bad DMA Chip
Replies: 160
Views: 26101

Re: STe - Bad DMA Chip

A couple of videos when using a HC CPU: https://joska.no/closure_ste_hc_1.mp4 https://joska.no/closure_ste_hc_2.mp4 In the first video there is no display after the crash, but you can hear noise from the crashed music player. In the second video you see how it crashed the second time I tested it. Sa...
by joska
Sat Sep 15, 2018 1:46 pm
Forum: Hardware
Topic: STe - Bad DMA Chip
Replies: 160
Views: 26101

Re: STe - Bad DMA Chip

The other computer is not mine, so there's two different CPU's as well. And a different tester ;)
by joska
Sat Sep 15, 2018 1:22 pm
Forum: Hardware
Topic: STe - Bad DMA Chip
Replies: 160
Views: 26101

Re: STe - Bad DMA Chip

I must remind you that this happens on two different STE's. Same problem on both - works fine with original CPU, does not work with HC CPU. Two different machines, two different drives (or three to be more precise, as I have recently replaced my drive with an original one) and two different disks.
by joska
Sat Sep 15, 2018 12:21 pm
Forum: Hardware
Topic: STe - Bad DMA Chip
Replies: 160
Views: 26101

Re: STe - Bad DMA Chip

My STE's PCB is also labelled CA4003290, dated 0291. The revision field is blank.
by joska
Thu Sep 13, 2018 5:42 pm
Forum: Hardware
Topic: STe - Bad DMA Chip
Replies: 160
Views: 26101

Re: STe - Bad DMA Chip

Odd... What revision is your STE?
by joska
Thu Sep 13, 2018 2:14 pm
Forum: CT60 / CT63 Area
Topic: CT60e, Not measuring up.
Replies: 56
Views: 10421

Re: CT60e, Not measuring up.

It has been posted in this thread.
by joska
Thu Sep 13, 2018 12:54 pm
Forum: Hardware
Topic: STe - Bad DMA Chip
Replies: 160
Views: 26101

Re: STe - Bad DMA Chip

joska wrote:Yes, it's most likely the CPU socket. I found a crack and a small piece was broken off.


Yes, it was the CPU socket, and yes, it has been fixed :)
by joska
Thu Sep 13, 2018 12:53 pm
Forum: Hardware
Topic: STe - Bad DMA Chip
Replies: 160
Views: 26101

Re: STe - Bad DMA Chip

Not sure if you can figure out what's happening with only a binary, but I guess /troed can easily figure exactly where {closure} crashes on the HC. It would be extremely interesting to find out what's happening, and how/if it can be worked around.
by joska
Wed Sep 12, 2018 9:54 am
Forum: 680x0
Topic: How to show a splash screen?
Replies: 3
Views: 239

Re: How to show a splash screen?

What kind of program? Do you want to load the program as a normal file, or are you writing a trackloading demo or game? If you want to use normal files and load them with GEMDOS you would have to create two different programs - one for the loader/splashscreen and one for the main program. In the loa...
by joska
Mon Sep 10, 2018 7:23 pm
Forum: Coding
Topic: how do i use a debugger ,
Replies: 2
Views: 208

Re: how do i use a debugger ,

what is a debugger ? A debugger is a program that let you inspect the status of the program you want to debug. You can step through the code line by line, and watch the variables and data changing. You can define breakpoints in your code, i.e. points in your code where execution is halted and contr...
by joska
Fri Sep 07, 2018 2:55 pm
Forum: Hardware
Topic: diagram on how to make amiga mouse work on atari st
Replies: 3
Views: 171

Re: diagram on how to make amiga mouse work on atari st

Swap pins 1 and 4 to convert an Amiga mouse to Atari (and vice versa).
by joska
Fri Sep 07, 2018 12:30 pm
Forum: News & Announcements
Topic: I just bought a TT030!
Replies: 45
Views: 1661

Re: I just bought a TT030!

NOVA is the best graphics card for the TT, definitely worth having.
by joska
Wed Sep 05, 2018 9:57 am
Forum: Hardware
Topic: STE boot grey desktop now changing to green - grey
Replies: 6
Views: 388

Re: STE boot grey desktop now changing to green - grey

What tzok said. The RF receiver in modern TV's are not designed for the poor signal quality old TV's had to cope with.
by joska
Wed Sep 05, 2018 7:12 am
Forum: Hardware
Topic: STe - Bad DMA Chip
Replies: 160
Views: 26101

Re: STe - Bad DMA Chip

czietz wrote:As for your STE, I suppose you already checked yourself, but just in case: look closely at the contacts of the CPU socket.


Yes, it's most likely the CPU socket. I found a crack and a small piece was broken off.
by joska
Tue Sep 04, 2018 7:35 pm
Forum: Hardware
Topic: STe - Bad DMA Chip
Replies: 160
Views: 26101

Re: STe - Bad DMA Chip

czietz wrote:My MegaSTE currently has a HC CPU. I can test next week, if you like. Or is there a known incompatibility with the MegaSTE in general with the demos mentioned above?


I believe {closure} doesn't work on the MSTE. Atleast it didn't a couple of years ago, maybe troed has released a fixed version?
by joska
Tue Sep 04, 2018 7:33 pm
Forum: Hardware
Topic: STe - Bad DMA Chip
Replies: 160
Views: 26101

Re: STe - Bad DMA Chip

The bombs after the initial opening texts really does sound like the disk content hasn't been read properly by the bootsector TOS floppy sector read code. The demo starts (well, startED :( ) correctly with the original CPU, so I believe the disk and drive is OK. Besides that, that's also the point ...
by joska
Tue Sep 04, 2018 6:47 pm
Forum: Hardware
Topic: STe - Bad DMA Chip
Replies: 160
Views: 26101

Re: STe - Bad DMA Chip

Argh, I have managed to damage my STE when swapping CPUs :( It does not boot anymore. I'll try to describe the symptoms instead. First of all, disregard my previous description. {closure} bombs out after displaying the "STNICC" opening text. Various number of bombs, sometimes a single red/...

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