Atari-Forum

Bad news, i thought i may have been on to something :( Good news. You don't have to unsolder the FDC! If anyone has a SHIFTER for sale i am in the UK and would be happy to pay for one. My IC is "C025914-38A PH23-024 6M1 41" I have seen a few but slightly different numbers and not sure wha...

Hi, just an idea about "project 2" (1040): Double- , well better triple-check that floppy ribbon cable is connected in the correct direction. From my Falcons i know that there´s no "security slot" and so the floppy connector can be mounted in both directions... Latz I really thi...

v01d wrote:I don't know the hardware well (...)
Does anyone have suggestions as to what I should try next?

Yes... definitely: do not try anything without proper knowledge! Or do you dare to repair your TV set?
Give it to someone capable of repairing it.

Would you mind elaborating on what difference i would be distinguishing and what to look for please as i dont have a colour monitor. White screen on a TV/SC1224 can mean that the CPU cannot access ROM. White screen on a SM124 should mean that it can access ROM. The reason is the hardware and TOS. A...

Projects A is a 520STFM C103414-001 REV 1.1 (2 chip ROM not sure but maybe TOS 1.04??? Fault = Hanging at white screen History = None, came to me missing screws and bottom ROM IC overheating. Tried = Removed ROM'S straightened bent pin and replaced, (No more over heating but no change), tried remov...

Now it would be the right time IMHO to connect a LA to the data/address lines on the internal expansion port and see if the CPU accesses ROM.

Hi, I've got some MegaST boards for repair and one drives me crazy. It's got additional sockets for CPU and PSG. Blitter removed, both solder-bridges closed. I checked the whole 4-IC chipset in a 1040STFM board. Works flawlessly. I can see two problems that might be connected to each other somehow. ...

I tried to check for _MCH cookie so I can detect the Mega STe and set $FF8E21 to 0. Sure this 0 the right value? According to the Compendium these values affect the systemspeed setting: Mega STe Cache/Processor Control Register as follows: Value Meaning 0xFF 16 MHz w/Cache 0xFE 16 MHz 0xF4 8 MHz Bu...

Sorry to say but it seems I dumped them already.

mikro wrote:However what would I certainly appreciate if someone had the exactly same unit, Conner CP2044PK (43 MB).

I will have a look in the evening. I definitely do have 2.5" Conner IDE. Don't know if it's 20MB or 40MB.

Well, the best accelerators for ST/STE are the old classic ones, with cache. Like ICD's AdSpeed and the Mega STE. Well, isn't AdSpeed affected with compatibility problems with IDE? Without cache, memory access is not improved at all, which basically is like replacing your car engine with a faster o...

Thanks to all of you. My application shall be run from the AUTO folder, so the advised methods won't work for me. I think I have found a solution for my problem (not getting the filename, but the underlying problem). Anyway: I do add a cookie but the cookie's value (uint32_t) is too small to take al...

Got a problem retrieving the filename of my own application at runtime. As argv[0] is empty under TOS I tried to get the filename via DTA: DTA myDTA; memcpy(&myDTA, Fgetdta(), sizeof(DTA)); printf(">%s<\n\r", myDTA.d_fname); I'm using Pure C 1.1 and if I enter the debugger via Alt-D I ...

rockyone wrote:Apparently, the problem does not occur during writing

What is "the problem"?

Think about it: what happens when you move the mouse?

Jo is right. You can have more than just one section of Alt.RAM at the same time - see MagnumST. Then the contents of $5A4 is probably not non-ambiguous.

That method works for ST-RAM only, but not for Alt-RAM.

Dal wrote:Probably some bleed from a clock. More a design issue than a fault.

Nope.
It's not a fault. The BIOS checks during VBI processing if a disk change occurred.

Thanx,
so you mean the first byte looks like this

with XXX being the ACSI target number?
But what follows? Standard 10/12Byte SCSI command?

Hi,
is there any documentation around about the ICD extensions for ACSI to send 10byte commands?

thanx, Arne

I'm writing some code to handle a hardware device I am working on. It is mapped into the 68k's address space and my hardware will generate /DTACK if addressed. Now I want to detect it via software i.e. access it and in case of a bus-error handle the exception instead of letting TOS throw two bombs. ...

Merci beaucoup

Can anyone point me to a downloadable archive of the INSJAR program (http://toshyp.atari.org/en/003007.html#Cookie_2C_20INSJ)that installs a cookie jar and fills it with some standard cookies?

I really dislike to see first 5 RECENT TOPICS polluted with FPGA stuff. I occasionally open atari-forum.com just to see 5 recent topic and almost always I see 5 topics about FPGA in "recent topics". And I am not interested in FPGA at all. There is no need to prohibit anything, just move t...

Seems to be an interface for this bus: https://en.wikipedia.org/wiki/Europe_Card_Bus IIRC it was a DIY project of the German c't magazine. At least the small yellow PCB at the left hand end of the flat-ribbon cable is a ROM-Port buffer. Useful to protect the ST and for extending the port's signals.