Search found 437 matches

by Arne
Fri Jun 01, 2018 5:26 am
Forum: Hardware
Topic: Defective MST board
Replies: 0
Views: 167

Defective MST board

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. ...
by Arne
Mon May 28, 2018 12:41 pm
Forum: Coding
Topic: Mega STe differences ?
Replies: 38
Views: 1877

Re: Mega STe differences ?

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...
by Arne
Fri May 25, 2018 10:59 am
Forum: Hardware
Topic: Sparrow inspection
Replies: 37
Views: 2709

Re: Sparrow inspection

Sorry to say but it seems I dumped them already. :shrug:
by Arne
Fri May 25, 2018 4:08 am
Forum: Hardware
Topic: Sparrow inspection
Replies: 37
Views: 2709

Re: Sparrow inspection

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.
by Arne
Thu May 24, 2018 5:58 am
Forum: Hardware
Topic: Recommended accelerator options for ST
Replies: 27
Views: 1093

Re: Recommended accelerator options for ST

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...
by Arne
Tue May 15, 2018 10:20 am
Forum: C / PASCAL etc.
Topic: Retrieve application filename
Replies: 6
Views: 532

Re: Retrieve application filename

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...
by Arne
Mon May 14, 2018 1:34 pm
Forum: C / PASCAL etc.
Topic: Retrieve application filename
Replies: 6
Views: 532

Retrieve application filename

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 ...
by Arne
Mon May 14, 2018 6:58 am
Forum: Coding
Topic: Data writing
Replies: 6
Views: 597

Re: Data writing

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


What is "the problem"?
by Arne
Mon May 14, 2018 5:32 am
Forum: Coding
Topic: Data writing
Replies: 6
Views: 597

Re: Data writing

Think about it: what happens when you move the mouse?
by Arne
Sat May 12, 2018 11:09 am
Forum: Coding
Topic: How to detect all available memory (used and free)
Replies: 9
Views: 841

Re: How to detect all available memory (used and free)

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.
by Arne
Fri May 11, 2018 3:39 pm
Forum: Coding
Topic: How to detect all available memory (used and free)
Replies: 9
Views: 841

Re: How to detect all available memory (used and free)

That method works for ST-RAM only, but not for Alt-RAM.
by Arne
Thu May 03, 2018 8:59 am
Forum: Hardware
Topic: Replacing 1040 ST FM keyboard with a 520 ST FM one - Drive's Busy Light always on
Replies: 5
Views: 820

Re: Replacing 1040 ST FM keyboard with a 520 ST FM one - Drive's Busy Light always on

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.
by Arne
Wed Mar 21, 2018 3:26 pm
Forum: Coding
Topic: ICD compatible ACIS extension
Replies: 3
Views: 998

Re: ICD compatible ACIS extension

Thanx,
so you mean the first byte looks like this

Code: Select all

X X X 1 1 1 1 1

with XXX being the ACSI target number?
But what follows? Standard 10/12Byte SCSI command?
by Arne
Wed Mar 21, 2018 7:18 am
Forum: Coding
Topic: ICD compatible ACIS extension
Replies: 3
Views: 998

ICD compatible ACIS extension

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

thanx, Arne
by Arne
Wed Mar 14, 2018 6:59 pm
Forum: 680x0
Topic: BusError Handler
Replies: 0
Views: 1018

BusError Handler

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. ...
by Arne
Wed Mar 14, 2018 2:49 pm
Forum: Applications
Topic: Looking for INSJAR
Replies: 3
Views: 858

Re: Looking for INSJAR

Merci beaucoup :-D
by Arne
Wed Mar 14, 2018 1:49 pm
Forum: Applications
Topic: Looking for INSJAR
Replies: 3
Views: 858

Looking for INSJAR

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?
by Arne
Wed Mar 14, 2018 1:43 pm
Forum: News & Announcements
Topic: The FPGA and non-Atari cores deserve the cover of this forum?
Replies: 69
Views: 5557

Re: The FPGA and non-Atari cores deserve the cover of this forum?

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...
by Arne
Tue Mar 13, 2018 7:03 pm
Forum: Hardware
Topic: What is that ROM PORT peripheral?
Replies: 3
Views: 534

Re: What is that ROM PORT peripheral?

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.
by Arne
Tue Feb 27, 2018 9:48 am
Forum: Hardware
Topic: Falcon Video extension
Replies: 14
Views: 1431

Re: Falcon Video extension

Do you refer to something like this: http://info-coach.fr/atari/documents/myFAQ.php Section Falcon video?
by Arne
Mon Feb 26, 2018 5:53 pm
Forum: Hardware
Topic: How much RAM in your Atari ST?
Replies: 64
Views: 10054

Re: How much RAM in your Atari ST?

by Arne
Mon Feb 26, 2018 2:29 pm
Forum: Hardware
Topic: How much RAM in your Atari ST?
Replies: 64
Views: 10054

Re: How much RAM in your Atari ST?

3meg isn't a supported RAM config on the ST, you probably have 2.5meg :) You are not up-to-date. 3MB IS possible. I had it one of mine, too. how does that work ? 2 meg add on card with 1 meg onboard ? Exactly. 2MB bank must be bank #1. With some TTL (I used a GAL) /RAS and /CAS lines are generated ...
by Arne
Mon Feb 26, 2018 11:43 am
Forum: Hardware
Topic: How much RAM in your Atari ST?
Replies: 64
Views: 10054

Re: How much RAM in your Atari ST?

spiny wrote:3meg isn't a supported RAM config on the ST, you probably have 2.5meg :)

You are not up-to-date. 3MB IS possible. I had it one of mine, too.
by Arne
Fri Feb 16, 2018 5:22 am
Forum: Hardware
Topic: How much RAM in your Atari ST?
Replies: 64
Views: 10054

Re: How much RAM in your Atari ST?

(double post - please delete)
by Arne
Fri Feb 16, 2018 5:17 am
Forum: Hardware
Topic: How much RAM in your Atari ST?
Replies: 64
Views: 10054

Re: How much RAM in your Atari ST?

Back in the day 2.5Mb was quite common on STFs. With a GAL or two 74 TTL you could resurrect the last 512KB again. At least TOS 2.06 counted up to 3072KB but I think that TOS 1.xx supported 3MB, too. Wasn't 4 meg the max on ST models ? In general: yes. Besides the well known Alt.RAM expansion that ...

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