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by joska
Tue Oct 20, 2020 6:03 pm
Forum: News & Announcements
Topic: Exist any Intel x86 port of Atari TOS?
Replies: 30
Views: 8107

Re: Exist any Intel x86 port of Atari TOS?

The history of cp/m and DOS is an interesting one. 86-DOS - which MS bought and called MS-DOS - was basically cp/m for the 8088/8086 but with better process/memory management and a better filesystem. You could even run cp/m-programs directly on it if you compiled them for the 8088/8086. DR-DOS can b...
by joska
Tue Oct 20, 2020 7:26 am
Forum: Coding
Topic: Beginner's guide to write a resident program
Replies: 12
Views: 400

Re: Beginner's guide to write a resident program

If you want to intercept system calls, you will also almost certainly want to look at their arguments on the stack. And depending on whether you're jumping to the original calls or not you would also have to clean up the stack before returning. So you may want to consider the difference in stack fra...
by joska
Mon Oct 19, 2020 12:14 pm
Forum: Hardware
Topic: Some Mega STE questions
Replies: 9
Views: 264

Re: Some Mega STE questions

The CPU I thought was a sensible thing to do, perhaps not. The CMOS one solves DMA issues according to Exxos. He is referring to the DMA problems that some STE's with the old style (same as in ST) DMA-chip suffers from. The CMOS CPU can indeed be used as a workaround for this problem. However, my e...
by joska
Mon Oct 19, 2020 7:30 am
Forum: Hardware
Topic: Some Mega STE questions
Replies: 9
Views: 264

Re: Some Mega STE questions

I'm going to swap the CPU for a more efficient one - Exxos sells them for not very much. I assume we're talking about the CMOS 68000? What do you want to achieve with that? If it makes any difference at all then it's a negative one - atleast in the plain STE the CMOS CPU can cause compatibility iss...
by joska
Sun Oct 18, 2020 4:57 pm
Forum: Professionals
Topic: Nova VME Bus Adapter Building Files ...
Replies: 343
Views: 166258

Re: Nova VME Bus Adapter Building Files ...

Based on my personal (=i.e. not representative) statistic, about half of the 68k CPUs sold on eBay, Aliexpress, etc. are fake in the sense that they are relabeled and you don't know what you actually get. This also applies to other "retro" chips. I've received fake AY-3-8910's, fake EEPROM's, fake ...
by joska
Sun Oct 18, 2020 11:11 am
Forum: Hardware
Topic: [MegaST] what hw upgrades do I need in 2020
Replies: 8
Views: 313

Re: [MegaST] what hw upgrades do I need in 2020

From what you describe it sounds like you got almost everything you need. You have 4Mb and an internal harddrive. Add a small (14-15") CRT TV with SCART and you have a very nice gaming setup. For monochrome stuff you can use a normal VGA monitor. Then get a PARCP-USB to transfer stuff from your PC. ...
by joska
Sun Oct 18, 2020 10:59 am
Forum: Professionals
Topic: Nova VME Bus Adapter Building Files ...
Replies: 343
Views: 166258

Re: Nova VME Bus Adapter Building Files ...

As czietz says, there is no such thing as a MC68010FN25. You will only find these in Chinese shops. If it's actually an 8MHz 68010 then there's a good chance it wont't work correctly at 16MHz. The 12MHz 010 should though. Try replacing it with your 68000, boot with XControl and set speed to 8MHz in ...
by joska
Sun Oct 18, 2020 7:38 am
Forum: Hardware
Topic: Atari STe SD card reader on the Extended Joystick Port
Replies: 80
Views: 6777

Re: Atari STe SD card reader on the Extended Joystick Port

I have not tried this, but I would assume this would work, especially with Klaz' games. But this solution also makes it a lot easier to write MSA/ST-images to floppies since you now can do this on the ST itself.
by joska
Sat Oct 17, 2020 11:43 am
Forum: Professionals
Topic: Nova VME Bus Adapter Building Files ...
Replies: 343
Views: 166258

Re: Nova VME Bus Adapter Building Files ...

Swapped 68000 with an 68010 and when Nova NVDI starts I get 4 bombs. Is there some incompatibility or? The 68010 has a different stackframe than the 68000. NovaVDI hooks into exception vectors and would have to deal with this, maybe it doesn't know/care about the 010 but only the more common 020+ p...
by joska
Thu Oct 15, 2020 7:55 pm
Forum: Hardware
Topic: Disable HDD on Mega STE?
Replies: 17
Views: 453

Re: Disable HDD on Mega STE?

If it has TOS 2.05 you will not see the Atari logo or memory test, just a white screen. Have you tried booting from a floppy?
by joska
Thu Oct 15, 2020 7:16 am
Forum: Games
Topic: Coming soon
Replies: 25
Views: 1549

Re: Coming soon

I know I sound too negative here, but I don't like working with emulators. They can be very useful, but when programming this close to the hardware they can only complement the real hardware, not substitute it. E.g. when working on l'Abbaye des Morts I spent quite a few days debugging some mysteriou...
by joska
Wed Oct 14, 2020 9:56 am
Forum: Hardware
Topic: Mega STe/MonSTer blitter problem
Replies: 5
Views: 452

Re: Mega STe/MonSTer blitter problem

From the thread you refered to: Another thing is that the blitter is grayed out on the TOS 2.06 desktop whereas it's been working fine until today when I tried out the new CF-IDE adapter (and had to remove pin 20 on the primary IDE bus on the MonSTer to make it physically fit). The MonSTer looks fin...
by joska
Tue Oct 13, 2020 7:55 am
Forum: Hardware
Topic: Mega STe/MonSTer blitter problem
Replies: 5
Views: 452

Re: Mega STe/MonSTer blitter problem

Fujiyama wrote: Mon Oct 12, 2020 7:54 pm I also noticed that when configuring M_ALTRAM.PRG (in the AUTO folder) these settings (16 MHz cache etc.) aren't reflected in the speed settings in GENERAL.CPX. so how does that work?
General.cpx sets the saved cpu/cache settings when it's loaded, and does not care about the previous settings.
by joska
Tue Oct 13, 2020 7:52 am
Forum: Games
Topic: Coming soon
Replies: 25
Views: 1549

Re: Coming soon

Joska would it be possible for this to run on a TT? Most likely. But there are two problems that has to be solved: 1. Graphics. TT low and med are fixed to 480 lines and 320/640 columns. On the Falcon the game use a custom resolution of either 256x192 or 512x384 (viewport to a slightly wider/taller...
by joska
Mon Oct 12, 2020 10:36 am
Forum: Hardware
Topic: ST with c1084monitor? TTL RGB DIN
Replies: 4
Views: 232

Re: ST with c1084monitor? TTL RGB DIN

I believe all 1084's has analog RGB inputs. There should also be a composite video input (CVBS). What connectors do you have on your 1084?
by joska
Sun Oct 11, 2020 7:36 pm
Forum: Games
Topic: Coming soon
Replies: 25
Views: 1549

Re: Coming soon

"Soon" is "when I'm finished" :D The game is mostly finished, I'm currently fixing bugs and tweaking it a bit. The "tweaking" part got a bit out of hand I'm afraid :) I wanted to make some twists to the game, and what I first thought were minor changes were in fact not so minor. So I'm currently th...
by joska
Mon Oct 05, 2020 12:42 pm
Forum: FireBee
Topic: New Firmware, FPGA Configuration and FireTOS
Replies: 33
Views: 2148

Re: New Firmware, FPGA Configuration and FireTOS

If I understand you correctly this is with the latest BaS/FireTOS? If have not tried this version myself, but IIRC some changes were done to the initialization of the DVI chip. This *could* be why this resolution is not working. Btw. it would be interesting to hear *how* it's not working. No image? ...
by joska
Thu Oct 01, 2020 7:15 pm
Forum: Hardware
Topic: SF314 Power Supply
Replies: 7
Views: 426

Re: SF314 Power Supply

The SF314 expects +12V on pin 4, while the XL PSU only provides +5V on this pin. It will probably work fine though, as the drive in your 314 most likely only needs +5V.
by joska
Thu Oct 01, 2020 7:01 am
Forum: Hardware
Topic: Partition harddisk take a while
Replies: 5
Views: 288

Re: Partition harddisk take a while

I have not partitioned a drive with HDX since the early 90's, but I do remember that it was a very lengthy process. I switched to ICD soon after getting my first harddrive, the ICD tools are much better than HDX and are freely available now. I suggest you try again with ICD and see what happens. htt...
by joska
Mon Sep 28, 2020 10:07 am
Forum: Hardware
Topic: SF314 Power Supply
Replies: 7
Views: 426

Re: SF314 Power Supply

The SF314 only needs +5V and +12V. I have a big button SF314 and it actually only needs the +5V, so you might get away with that. A 1A USB-charger should do, but you will of course have to make a cable.
by joska
Fri Sep 25, 2020 7:30 pm
Forum: Applications
Topic: mach64 nvdi configuration
Replies: 4
Views: 318

Re: mach64 nvdi configuration

Almost 25 years ago I wrote a tiny tool that (de)activates the NVDI screendrivers automatically depending on whether NOVA VDI was installed or not. This way you could also boot with full NVDI even when NOVA VDI was disabled. For me it was essential because with the Afterburner it was not possible to...
by joska
Fri Sep 25, 2020 7:06 am
Forum: Applications
Topic: mach64 nvdi configuration
Replies: 4
Views: 318

Re: mach64 nvdi configuration

If you already have NVDI installed you only need to rename the NVDIDRV?.SYS files in your GEMSYS-folder to *.SYZ. Then make sure that nvdi.prg runs after NOVA-VDI in the auto-folder.
by joska
Wed Sep 23, 2020 11:42 am
Forum: Games
Topic: Coming soon
Replies: 25
Views: 1549

Re: Coming soon

"Soon" is "when I'm finished" :D The game is mostly finished, I'm currently fixing bugs and tweaking it a bit.
by joska
Wed Sep 23, 2020 9:30 am
Forum: Games
Topic: Coming soon
Replies: 25
Views: 1549

Re: Coming soon

Well, it's a bit late for me to change the graphics now I'm afraid. Using your graphics will mean a radical change from tilebased to prerendered backgrounds, which is something I'm not going to do as the entire game-engine is based around tiles. Edit: I see now that the tiles (most of them atleast, ...
by joska
Wed Sep 23, 2020 9:02 am
Forum: Professionals
Topic: Falcon issues - very confusing
Replies: 47
Views: 2240

Re: Falcon issues - very confusing

You need to image the entire disk, not the partitions. Under Linux the disk itself will be available as e.g. /dev/sdb. Then each partition - if any - will be mounted as /dev/sdb1, /dev/sdb2 etc. When you mount a partition under Linux you mount the sdb1/sdb2/etc block devices, as each of the partitio...

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