Search found 1031 matches

by czietz
Sun Dec 08, 2019 3:29 pm
Forum: Hatari
Topic: Raspberry Pi keyboard issue
Replies: 10
Views: 437

Re: Raspberry Pi keyboard issue

Well, for starters the default SDL keymap has no entry (= 0) for SDL_SCANCODE_NONUSBACKSLASH: https://hg.libsdl.org/SDL/file/bc90ce38f1e2/src/events/SDL_keyboard.c#l147 SDL has quite complicated and platform-dependent algorithms to augment the default keymap. Which is why it works for me under Windo...
by czietz
Sun Dec 08, 2019 9:35 am
Forum: Hardware
Topic: 4xTOS selection for STE?
Replies: 19
Views: 396

Re: 4xTOS selection for STE?

Note that the 27C040 EPROMs mentioned in kodak80's link and the SST39SF040 flash ROMs that we talked about have slightly different pinouts. That's why I mentioned which pins you have to bend up.
by czietz
Sat Dec 07, 2019 1:11 pm
Forum: Hardware
Topic: 4xTOS selection for STE?
Replies: 19
Views: 396

Re: 4xTOS selection for STE?

But I have no idea how to get the correct decoding lines for the address and chip select from the TOS sockets in the STE to route to the FLASH chips :( I'm not sure I understand your question. Simply put them into the sockets. Be sure to jumper (W102-W104) the STE mainboard to 27C1001 configuration...
by czietz
Sat Dec 07, 2019 11:16 am
Forum: Hardware
Topic: 4xTOS selection for STE?
Replies: 19
Views: 396

Re: 4xTOS selection for STE?

If you do not want to re-flash the TOS versions later, the minimum solution would be to put some programmed SST39SF040 flash ICs into the sockets in the STE, bend up the pins for the two top address lines and connect them to two toggle switches. Obviously, then you have to take care yourself not to ...
by czietz
Sat Dec 07, 2019 9:36 am
Forum: Hardware
Topic: Cloudy: Flashable, dual TOS add-on for the Lightning ST
Replies: 0
Views: 95

Cloudy: Flashable, dual TOS add-on for the Lightning ST

When we made the Lightning ST – the only combined USB and IDE adapter for the Atari ST/MegaST – people asked us about upgrading their STs to TOS 2.06 or EmuTOS for built-in IDE support. We listened to you! We’re happy to present you the CLOUDY : an extremely compact TOS adapter to be used together w...
by czietz
Sat Nov 30, 2019 8:19 pm
Forum: C / PASCAL etc.
Topic: Manual for Lattice C
Replies: 101
Views: 48792

Re: Manual for Lattice C

kodak80 wrote:These should all be on dev-docs now.


They are: https://docs.dev-docs.org/htm/search.php?find=Lattice+C
by czietz
Wed Nov 27, 2019 7:27 pm
Forum: Hatari
Topic: Hatari and hard disk drivers with emutos
Replies: 1
Views: 225

Re: Hatari and hard disk drivers with emutos

marcello wrote:Hi
Using Emutos with Hatari, I noticed that Emutos always use its own hard driver, ie bypassing whatever AHDI, ICD it would find on the boot disk.
Is that expected behaviour ?


This is not Hatari-specific, but yes, it is fully expected. EmuTOS includes its own hard disk drivers. :D
by czietz
Wed Nov 27, 2019 7:41 am
Forum: Hardware
Topic: fixing the dead CT60
Replies: 12
Views: 2899

Re: fixing the dead CT60

The number is visible on this photo of a CT60: http://powerphenix.com/ct60/CT60_inc.jpg. It's a flash ROM, 29F800.
by czietz
Mon Nov 25, 2019 8:34 pm
Forum: 680x0
Topic: The secrets of the 68000
Replies: 14
Views: 1134

Re: The secrets of the 68000

Another clue might be that for "MOVE.W D0,-(A0)" the write access that causes the address error only happens after the prefetch for the next instruction. Unlike you, I don't know how the internal sequencer of the 68000 works, but one could assume that the I/N bit due to the upcoming TRACE ...
by czietz
Mon Nov 25, 2019 6:30 pm
Forum: 680x0
Topic: The secrets of the 68000
Replies: 14
Views: 1134

Re: The secrets of the 68000

Now you've intrigued me and I had a look at the 68000 manual. (Even though that is definitively cheating.) With respect to the I/N bit is says: "The processor is processing an instruction if it is in the normal state or processing a group 2 exception; the processor is not processing an instruct...
by czietz
Mon Nov 25, 2019 5:15 pm
Forum: 680x0
Topic: The secrets of the 68000
Replies: 14
Views: 1134

Re: The secrets of the 68000

I didn't test my theory, because that would be cheating. ;-) But it is revealing that you omitted the operand size from the MOVE instruction. Thus, my guess is as follows: It depends on that size. If there is only one write access (.B / .W), the instruction is considered finished when the exception ...
by czietz
Sun Nov 24, 2019 9:51 am
Forum: Hardware
Topic: Atari ST HDMI solution from The backofficeshow
Replies: 10
Views: 1363

Re: Atari ST HDMI solution from The backofficeshow

His Idea was to ceate an HDMI adapter for ST without going the analogue way over the monitor connector, but beeing plugged in the Shifter socket and grabbing the digital access of the ST-shifter to the memory and puttng this directly on a frame buffer which then pushes then out that to HDMI I think...
by czietz
Sat Nov 16, 2019 4:37 pm
Forum: Hardware
Topic: The strange atari motherboard game
Replies: 9
Views: 867

Re: The strange atari motherboard game

Or the RAM is disconnected? Looking at the mainboard picture, the RAS and CAS resistors R71-73 and R59-61 appear to be missing. Maybe the mainboard had a RAM expansion installed that has been removed? Compare your board to the similar looking https://www.exxoshost.co.uk/forum/downl ... hp?id=5489
by czietz
Sat Nov 16, 2019 4:28 pm
Forum: Hardware
Topic: The strange atari motherboard game
Replies: 9
Views: 867

Re: The strange atari motherboard game

Could be dead RAM, yes. Even with unreadable screen, the diagnostic cartridge will output information over the serial port (9600 bit/s, 8N1).
by czietz
Sat Nov 16, 2019 3:28 pm
Forum: Hardware
Topic: The strange atari motherboard game
Replies: 9
Views: 867

Re: The strange atari motherboard game

Simply unplugging the mod will not revert the system to the original state because a trace needs to cut when installing the Overscan. The manual should tell you which pins to bridge to get the system running when the Overscan is unplugged.

EDIT:
overscan.PNG
by czietz
Sat Nov 16, 2019 8:18 am
Forum: Hardware
Topic: The strange atari motherboard game
Replies: 9
Views: 867

Re: The strange atari motherboard game

Frank is of course right. Manual for the Overscan ST is on dev-docs, in case you want to check it is installed correctly: https://docs.dev-docs.org/htm/search.ph ... ual&email=
by czietz
Thu Nov 14, 2019 7:20 pm
Forum: Hardware
Topic: Atari ST HDMI solution from The backofficeshow
Replies: 10
Views: 1363

Re: Atari ST HDMI solution from The backofficeshow

See this discussion over at Exxos' forum: https://www.exxoshost.co.uk/forum/viewtopic.php?f=20&t=2301&start=20#p28448. If you already have a UBE video adapter, you can get the VGA2HDMI adapter for ca. 5 dollars from China, instead of paying 99 pounds. Also, until someone proves otherwise man...
by czietz
Thu Nov 14, 2019 6:31 am
Forum: Games - General
Topic: ST BIOS Source Listings found
Replies: 12
Views: 1474

Re: ST BIOS Source Listings found

It looks similar to the one on dev-docs: https://docs.dev-docs.org/htm/search.ph ... Listing%29. But you seem to have more pages. E.g. I don't find the landscape pages in the dev-docs document.
by czietz
Wed Nov 13, 2019 8:14 pm
Forum: News & Announcements
Topic: FX68K Cycle accurate 68000 core
Replies: 56
Views: 17997

Re: FX68K Cycle accurate 68000 core

Nice! I love that sort of small findings. Now I wonder how many emulators will emulate this behavior correctly...
by czietz
Fri Nov 08, 2019 8:01 pm
Forum: Hardware
Topic: NetUSBee USB drivers package v5
Replies: 44
Views: 4163

Re: NetUSBee USB drivers package v5

Ah, I see. Blame it on recent FreeMiNT development, who (rather needlessly, imho) changed their USB API to be incompatible with what was before. The latest released Lightning ST/VME drivers (r226) still use the old API. It's easily fixable; it's just a matter of compiling the tablet driver against t...
by czietz
Fri Nov 08, 2019 6:12 pm
Forum: Hardware
Topic: NetUSBee USB drivers package v5
Replies: 44
Views: 4163

Re: NetUSBee USB drivers package v5

What does the tablet driver output when you load it (on the computer with the Lightning VME/ST, obviously)?
by czietz
Fri Nov 08, 2019 4:15 pm
Forum: Hardware
Topic: NetUSBee USB drivers package v5
Replies: 44
Views: 4163

Re: NetUSBee USB drivers package v5

ama wrote:I like working with the graphic tablet. Is there a way to adapt the tablet driver also to the Lightning USB?


I'd expect it to work right out of the box with the Lightning VME/ST. Doesn't it?
by czietz
Sun Nov 03, 2019 12:38 pm
Forum: News & Announcements
Topic: New online "retro" image tool
Replies: 18
Views: 11524

Re: New online "retro" image tool

Do you have any links to data format descriptions that you have used (for the Neochrome Master format especially)? Do you already know this: https://docs.dev-docs.org/htm/search.php?find=ST+Picture+Formats+revis? File format descriptions for a lot of file formats including samples to test your code.
by czietz
Wed Oct 30, 2019 7:14 pm
Forum: Hardware
Topic: NetUSBee USB drivers package v5
Replies: 44
Views: 4163

Re: NetUSBee USB drivers package v5

The Lightning keyboard driver has a method to inject key presses even on TOS 1, using a small helper program keyb_inj.prg. However, this is a bit of a hack; I'm not sure if the FreeMiNT maintainers would like this in their official repo.
by czietz
Mon Oct 28, 2019 5:12 pm
Forum: Hardware
Topic: 520STm Modification
Replies: 3
Views: 998

Re: 520STm Modification

I also think it's original. You can see the same crude hack on this 520STm mainboard as well: https://www.exxoshost.co.uk/forum/download/file.php?id=1572. It's part of the circuit that synchronizes the ca. 32 MHz main clock (=Shifter pixel clock) to the color subcarrier oscillator to avoid visible a...

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