Search found 2468 matches

by ijor
Tue May 08, 2018 2:52 pm
Forum: Games - Requests
Topic: Warzone / Core Design / 1991
Replies: 28
Views: 3476

Re: Warzone / Core Design / 1991

If it's a normal Rob Northen Copylock protected disk and you want to make a working protected copy from a non-working image you could try using the attached util to copy it over any other working copylock keydisk. It just copies the part required for calculating the "magic number" and lea...
by ijor
Tue May 08, 2018 1:22 pm
Forum: Games - Requests
Topic: Warzone / Core Design / 1991
Replies: 28
Views: 3476

Re: Warzone / Core Design / 1991

Very interesting, thanks for the reply, ijor. I don't have original disk of Warzone, but I've taken a look at all Core design games I've dumped. They all use the same CopyLock / Rob Northen protection (some have a different year of release). All work very well with Steem so i was surprised to see W...
by ijor
Tue May 08, 2018 2:51 am
Forum: MiSTer
Topic: I/O Board
Replies: 157
Views: 19831

Re: I/O Board

Somebody sells a fully assembled I/O board?
by ijor
Mon May 07, 2018 6:27 pm
Forum: Games - Requests
Topic: Warzone / Core Design / 1991
Replies: 28
Views: 3476

Re: Warzone / Core Design / 1991

Ok, yes, it was as I suspected ... The problem is that the index pulse position is wrong. It is not correctly aligned with the data and then the copy protection fails when looking for the first header when performing a read track. This is a common check on most CopyLock protections. Conceivable it i...
by ijor
Mon May 07, 2018 4:01 pm
Forum: Games - Requests
Topic: Warzone / Core Design / 1991
Replies: 28
Views: 3476

Re: Warzone / Core Design / 1991

... ah ... I think I know what happens, I'll confirm later, please stand by :)
by ijor
Mon May 07, 2018 1:53 pm
Forum: SuperCard Pro Disk Copier
Topic: SCP disk images !
Replies: 560
Views: 146391

Re: SCP disk images !

Somebody knows if the ftp server at retrobackup is working? I do can connect but seems that the old known password doesn't work anymore.

Somebody made some kind of mirror?
by ijor
Mon May 07, 2018 1:47 pm
Forum: Games - Requests
Topic: Warzone / Core Design / 1991
Replies: 28
Views: 3476

Re: Warzone / Core Design / 1991

Hi, I didn't have much time to check, but at first glance I don't see any obvious issue.

Do you know if the original disk actually works? Did you try to write back the image?
by ijor
Sun Apr 29, 2018 9:12 pm
Forum: Games - Requests
Topic: Warzone / Core Design / 1991
Replies: 28
Views: 3476

Re: Warzone / Core Design / 1991

Hi Ijor, I need to know if anything has been tampered. the CTR file fails, the IPF fails, and the STX file fails. Problem : no track has been modified. that's why i'm pulling my hair out. I have a possible idea what's going on. Please PM me a link to the RAW images. About the protection track, it g...
by ijor
Sun Apr 29, 2018 8:34 pm
Forum: Games - Requests
Topic: Warzone / Core Design / 1991
Replies: 28
Views: 3476

Re: Warzone / Core Design / 1991

Hi,

Strange, didn't decrypt the loader yet, but it seems to fail when looking for something at track 1. It never attempts to read the copy protected sector at track 0.

It might be a bad Pasti conversion. Please provide or email the RAW files.

It is known if the disk actually works?
by ijor
Fri Apr 27, 2018 3:56 pm
Forum: MiSTer
Topic: Atari 800 Core - Joystick problem with one game
Replies: 11
Views: 1131

Re: Atari 800 Core - Joystick problem with one game

The original developer of this core, foft, sometimes follows this subforum and probably will reply, eventually. But he is much more active in Atariage. Not sure he has a MiSTer though. The core is extremely accurate, and MULE, arguably the most popular Atari 8-bit game, surely has been played and te...
by ijor
Tue Apr 10, 2018 4:43 pm
Forum: Hatari
Topic: Multi-Core support with Hatari?
Replies: 9
Views: 1383

Re: Multi-Core support with Hatari?

This has been discussed already. It does not make much sense, not only because it is complicated to get the synchronization right, but mainly because hatari tries hard to do cycle exact emulation of both the cpu, video system, dsp etc., and the subprocesses (or threads) would most of the time just ...
by ijor
Wed Mar 21, 2018 2:01 pm
Forum: MiSTer
Topic: ATARI ST Core
Replies: 13
Views: 2222

Re: ATARI ST Core

It is not only about the CPU. Among other things, a cycle accurate GLUE is required for overscan and sync scroll, FDC must be precise for copy protected disk images to work correctly, etc, etc ... The bar might be a little high, but it is not that far as it might seem. I have building blocks for mos...
by ijor
Tue Mar 20, 2018 1:17 am
Forum: MiSTer
Topic: ATARI ST Core
Replies: 13
Views: 2222

Re: ATARI ST Core

As I said in some other thread, I am willing to port the ST core. But being obsessive about cycle accuracy, I don't want to just port it without implementing major improvements in this aspect. So I need to find the time for that. I need to finish a couple of "real life" projects and I migh...
by ijor
Sun Mar 18, 2018 11:17 am
Forum: Applications
Topic: Atari ST Protection Technioques
Replies: 17
Views: 2380

Re: Atari ST Protection Technioques

There was no copy protection on the version I uploaded above. Or at least the original disk copied OK with FCOPY (no errors) and everything seemed to work OK from the copy. Strange considering that it is from the same author and same publisher as the 8-bit version, but oh well. The copy protection ...
by ijor
Sat Mar 17, 2018 11:08 pm
Forum: Applications
Topic: Atari ST Protection Technioques
Replies: 17
Views: 2380

Re: Atari ST Protection Technioques

I don't remember about the ST version. But the 8-bit version of the disk is heavily copy protected. The protection is (also) present as a demo of the disk protection techniques. It's very possible, even likely, that the ST version is copy protected as well.
by ijor
Fri Feb 23, 2018 1:16 am
Forum: MiSTer
Topic: MiSTer on DE10-Standard - needed?
Replies: 54
Views: 3663

Re: MiSTer on DE10-Standard - needed?

Another problem with PSRAM/HyperRAM is max of 128MBit per chip. SDRAM used in MIST/MiSTer is 256MBit. So, for compatibility you need to use 2 chips which will give more troubles. PSRAM is actually DDR requiring diff-clock and much cleaner signals to operate. Currently, i see more troubles than adva...
by ijor
Thu Feb 22, 2018 9:51 pm
Forum: MiSTer
Topic: MiSTer on DE10-Standard - needed?
Replies: 54
Views: 3663

Re: MiSTer on DE10-Standard - needed?

Your understanding is wrong. Auto-refresh is not hidden. HyperRAM has special output signal which shows refresh cycle, so host has to suspend any operations till this signal become inactive again. You cannot control it. You only can wait for it. It's the same as DDR3 with HW memory controller used ...
by ijor
Thu Feb 22, 2018 9:01 pm
Forum: MiSTer
Topic: MiSTer on DE10-Standard - needed?
Replies: 54
Views: 3663

Re: MiSTer on DE10-Standard - needed?

I don't have personal experience with these HyperRAM, but as I understand they aren't exactly "PSEUDO-SRAM". They behave more like SDRAM with a hidden auto refresh. In this case you do have partial control of the refresh time. As long as you idle the RAM frequently enough, it will refresh ...
by ijor
Thu Feb 22, 2018 11:28 am
Forum: Pasti & VAPI
Topic: Quickstart guide for making Pasti-images
Replies: 8
Views: 9247

Re: Quickstart guide for making Pasti-images

Is it possible to have the image file saved onto the PCs hard-drive instead of to the transfer floppy drive? I got the feeling it only worked when writing to a transfer floppy when checking the read me file. The thing is that the PC with an FDC is at my mums place and my ST is at my place. So I wou...
by ijor
Wed Feb 21, 2018 3:00 pm
Forum: Pasti & VAPI
Topic: Quickstart guide for making Pasti-images
Replies: 8
Views: 9247

Re: Quickstart guide for making Pasti-images

A bit of a necro post this, but since the PASTI software is still relevant, I thought what the hell :). Is there a way to have PastiTools.exe write to an image file on the PC HD instead of to a floppy transfer disk? I'm not sure what you mean. PastiTools precisely creates and writes to an image fil...
by ijor
Tue Feb 20, 2018 10:25 pm
Forum: FPGA Chat
Topic: Analogue Super NT
Replies: 63
Views: 6030

Re: Analogue Super NT

I don't know why VRR is required. It's more a formal writing of limits. Current HDMI v1.4 is able to use any frequencies. ... I have small 7" HDMI monitor. It supports HDMI video with wide tolerance. It accepts any pixel clock i throw on it. But it does frame rate conversion into its internal ...
by ijor
Mon Feb 19, 2018 1:55 pm
Forum: FPGA Chat
Topic: Analogue Super NT
Replies: 63
Views: 6030

Re: Analogue Super NT

HDMI 2.1 supports Variable Refresh Rate, so, hopefully, in the future we’ll see TV sets perfect for modern and retro computing/gaming. How does MiSTer (and other FPGA based platforms like Super NT and OSSC) implement HDMI? I mean: is it just an HDMI socket and some basic electronics (caps, resistor...
by ijor
Sun Feb 18, 2018 2:19 am
Forum: FPGA Chat
Topic: Analogue Super NT
Replies: 63
Views: 6030

Re: Analogue Super NT

Sorgelig wrote:I don't agree.
There are options much better than GBS and cheaper than XRGB.
Some LKV scalers are very good. Read my posts in VGA upscaling experiments thread.


Thanks for the pointer. Will check that thread thoroughly.
by ijor
Sun Feb 18, 2018 2:18 am
Forum: FPGA Chat
Topic: Analogue Super NT
Replies: 63
Views: 6030

Re: Analogue Super NT

Just out of curiosity: don’t modern USA TV sets support 50Hz through HDMI? Even if they do, it doesn't mean it will accept the 50Hz non-standard signal produces by many retro systems. In some cases you might even need refresh rate conversion from 60Hz to 60Hz for this very same reason. Btw, I also ...
by ijor
Sun Feb 18, 2018 2:14 am
Forum: FPGA Chat
Topic: Analogue Super NT
Replies: 63
Views: 6030

Re: Analogue Super NT

But I'm just sticking to the original question about handling the conversion, for which not many options seem to exist. Next step above the GBS seems to be the XRGB, which works but is quite a leap in price. So those are the only two devices that perform frame buffer refresh rate conversion? I assu...

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