Search found 482 matches

by siriushardware
Sat Oct 19, 2019 2:09 pm
Forum: Hardware
Topic: STFM doesn't boot, CPU halted. How to find what's going wrong?
Replies: 13
Views: 561

Re: STFM doesn't boot, CPU halted. How to find what's going wrong?

I only discovered this when I bought a lead intended to allow a VGA monitor to be used as a substitute hi-res (mono) monitor - one particular LCD monitor that I have ('Medion' Brand) would not work, the sync inputs on that monitor measure 75 ohms from Hsync and Vsync down to ground. The ones which w...
by siriushardware
Fri Oct 18, 2019 5:49 pm
Forum: Hardware
Topic: STFM doesn't boot, CPU halted. How to find what's going wrong?
Replies: 13
Views: 561

Re: STFM doesn't boot, CPU halted. How to find what's going wrong?

When you say 'RGB monitor', do you mean one which uses composite video / composite sync for sync like most TVs and a lot of general purpose video monitors do, or do you mean one which has separate Hsync and Vsync like the dedicated Atari monitors do? The reason I ask is that I don't think the sync o...
by siriushardware
Sat Oct 12, 2019 9:35 am
Forum: Hardware
Topic: STFM doesn't boot, CPU halted. How to find what's going wrong?
Replies: 13
Views: 561

Re: STFM doesn't boot, CPU halted. How to find what's going wrong?

In this case it seems like every time a chip is replaced a little bit more of the machine comes to life, which bodes ill: As Ceitz says, it sounds like something catastrophic has happened to this machine, such as overvoltage on the +5V rail or a lightning strike on the mains supply - in such a case ...
by siriushardware
Tue Oct 08, 2019 10:40 pm
Forum: Hardware
Topic: STe - Bad DMA Chip
Replies: 188
Views: 44347

Re: STe - Bad DMA Chip

In the vast majority of cases the people who have done this do not care why it fixes the problem as long as it does. Quite dangerous, since you don't really know what cause the issue ;) Not really, if the original fault (hard drive device corruption) is fixed and the machine exhibits no new side ef...
by siriushardware
Mon Oct 07, 2019 5:12 pm
Forum: Games - General
Topic: Help (walkthrough) needed for "Black Dawn" text-adventure
Replies: 22
Views: 2036

Re: Help (walkthrough) needed for "Black Dawn" text-adventure

OK, over the bridge now although I can see myself having to go back to the save point before crossing it quite a few times over before I arrive at the weight configuration which is the most compatible with my being able to continue through the game. Didn't get far though, I'm with the two goons guar...
by siriushardware
Sat Oct 05, 2019 3:53 pm
Forum: Hardware
Topic: STe - Bad DMA Chip
Replies: 188
Views: 44347

Re: STe - Bad DMA Chip

It doesn't actually matter whether the 'Bad DMA' scenario is a myth or not, if changing the 'Bad DMA' to a 'Good DMA' fixes people's DMA problems, and in many cases it has. In the vast majority of cases the people who have done this do not care why it fixes the problem as long as it does. Understand...
by siriushardware
Sat Oct 05, 2019 3:42 pm
Forum: Games - General
Topic: Help (walkthrough) needed for "Black Dawn" text-adventure
Replies: 22
Views: 2036

Re: Help (walkthrough) needed for "Black Dawn" text-adventure

I haven't been back to follow up on your hint but I was thinking along the lines of 'Dare to cross bridge', or something like that. I'm away from my ST at the moment, I will try to make further progress when I get back to base. This puts me in mind of a time when, strangely enough, playing a text ad...
by siriushardware
Tue Oct 01, 2019 9:37 pm
Forum: Hardware
Topic: Atari 520 STM no video
Replies: 3
Views: 301

Re: Atari 520 STM no video

Is the modulator which has been removed a small one or a big one? The small version of the 'modulator' only really contains the RF transmitter portion of the modulator, and most of the other components like the chip which makes composite video from the R-G-B outputs from the shifter are on the mothe...
by siriushardware
Tue Oct 01, 2019 7:54 pm
Forum: Games - General
Topic: Help (walkthrough) needed for "Black Dawn" text-adventure
Replies: 22
Views: 2036

Re: Help (walkthrough) needed for "Black Dawn" text-adventure

Thanks for that - I didn't feel that was a particularly rational solution to the cat problem, but there it is. I suppose 'Perform Heimlich manouvre on cat' might have been taking it a bit too far. Dear me, the spelling in this game. I was forced to refer to the rifles as 'riffles' when I tried to ex...
by siriushardware
Mon Sep 30, 2019 8:32 pm
Forum: Games - General
Topic: Help (walkthrough) needed for "Black Dawn" text-adventure
Replies: 22
Views: 2036

Re: Help (walkthrough) needed for "Black Dawn" text-adventure

More observations: In the Naturoid's hut there is a chair, which if examined, looks unsafe. If you sit on it you end up with a splinter stuck in you and lose some health. However, the splinter is not a real object that you can pull out and keep, so it seems like this is an intentional distraction / ...
by siriushardware
Mon Sep 30, 2019 6:30 pm
Forum: Games - General
Topic: Help (walkthrough) needed for "Black Dawn" text-adventure
Replies: 22
Views: 2036

Re: Help (walkthrough) needed for "Black Dawn" text-adventure

The cat is another example of something which could have been handled better, as it is 'created' when you examine the bins and continues to exist, even though you can't see it in front of you, until you try to interact with the 'invisible' cat, whereupon it spits in your face and disappears - and so...
by siriushardware
Sun Sep 29, 2019 11:28 pm
Forum: Games - General
Topic: Help (walkthrough) needed for "Black Dawn" text-adventure
Replies: 22
Views: 2036

Re: Help (walkthrough) needed for "Black Dawn" text-adventure

Hmm, well. I played through it again up to the alley and this time I'm stuck! I really did think I'd got past that stage last time. I'm aware of the cat, which manifests itself when you look at the dustbins, and you may have noticed that the description says it has something silver in its mouth, but...
by siriushardware
Thu Sep 26, 2019 9:03 pm
Forum: Games - General
Topic: Help (walkthrough) needed for "Black Dawn" text-adventure
Replies: 22
Views: 2036

Re: Help (walkthrough) needed for "Black Dawn" text-adventure

Thank you. I can't believe I missed that the first time. Lesson learned. Well, I would say that was intended to happen, so don't beat yourself up over it. I know I have criticised the game for bad language and some incorrect spelling but this was one example of the way in which the author sometimes...
by siriushardware
Thu Sep 26, 2019 12:14 am
Forum: Games - General
Topic: Help (walkthrough) needed for "Black Dawn" text-adventure
Replies: 22
Views: 2036

Re: Help (walkthrough) needed for "Black Dawn" text-adventure

longLifeA1200, sorry, I misinformed you. There's another object in the Beast's cave, have another look around in there. That's the item you need to be wearing before you go IN through the opened gates. Remember to pick up the item which hits you on the knee when the gates open, and have any other it...
by siriushardware
Tue Sep 24, 2019 9:59 pm
Forum: Games - General
Topic: Help (walkthrough) needed for "Black Dawn" text-adventure
Replies: 22
Views: 2036

Re: Help (walkthrough) needed for "Black Dawn" text-adventure

I'll try it again and this time I'll write down the exact steps. Back in a day or so.
by siriushardware
Mon Sep 23, 2019 9:36 pm
Forum: Hardware
Topic: Samsung SyncMaster 741MP sync problem
Replies: 4
Views: 438

Re: Samsung SyncMaster 741MP sync problem

The LM1881 is just a sync separator IC - composite video in, produces TTL-level composite sync and vysnc out, (if you are running the LM1881 on 5V). An example of its usage can be seen here:- https://gamesx.com/misctech/lm1881.htm The problem with using this IC in an Atari ST context is where to get...
by siriushardware
Mon Sep 23, 2019 4:08 pm
Forum: Hardware
Topic: UltraSatan clears SD card on Atari power off
Replies: 13
Views: 1218

Re: UltraSatan clears SD card on Atari power off

tzok wrote:and SN74LS425NC (Texas Instruments)


I assume you meant SN74LS245NC :)

Thanks, it's always useful to have little bits of information like this in the public domain.
by siriushardware
Sun Sep 22, 2019 12:40 pm
Forum: Hardware
Topic: UltraSatan clears SD card on Atari power off
Replies: 13
Views: 1218

Re: UltraSatan clears SD card on Atari power off

Another question. Since you changed those buffers, has the STe stopped destroying the FAT on floppies, as you said it did from time to time in post #3 of this thread?
by siriushardware
Sun Sep 22, 2019 9:41 am
Forum: Hardware
Topic: UltraSatan clears SD card on Atari power off
Replies: 13
Views: 1218

Re: UltraSatan clears SD card on Atari power off

Tzok, if you still have them to examine, what brand / type were the original buffer ICs and what brand / type did you replace them with?
by siriushardware
Sun Sep 22, 2019 9:20 am
Forum: Hardware
Topic: STe - Bad DMA Chip
Replies: 188
Views: 44347

Re: STe - Bad DMA Chip

"Myth". I think that's a slight overstatement. There obviously is a problem for some machines which originally had a 'normal' CPU and a 'Bad' DMA fitted, when used in conjunction with certain HDD-like devices such as UltraSatan. Originally most people were able to fix this by replacing the...
by siriushardware
Sun Sep 22, 2019 8:59 am
Forum: Games - General
Topic: Help (walkthrough) needed for "Black Dawn" text-adventure
Replies: 22
Views: 2036

Re: Help (walkthrough) needed for "Black Dawn" text-adventure

As far as the game itself is concerned I didn't play it much beyond the point where you were stuck. Unnecessary use of bad language turns me off, and although the writer obviously has a good imagination and a wide spoken vocabulary, there are quite a few basic spelling mistakes which are not accepta...
by siriushardware
Sat Sep 21, 2019 10:22 pm
Forum: Games - General
Topic: Help (walkthrough) needed for "Black Dawn" text-adventure
Replies: 22
Views: 2036

Re: Help (walkthrough) needed for "Black Dawn" text-adventure

As far as I remember, you automatically wear the ring when you take it, but if not, make sure you are wearing it. Then, go through the other process required to open the door. Wearing the ring, you should be able to pass north through the opened gate (and the force field) unharmed.
by siriushardware
Sun Sep 08, 2019 1:32 pm
Forum: Hardware
Topic: UltraSatan clears SD card on Atari power off
Replies: 13
Views: 1218

Re: UltraSatan clears SD card on Atari power off

Oh, one thing I forgot to ask: Does this problem still occur if you hold down the STe's reset button before, and while, and for a little while after the machine is powering down? In theory this should suspend all DMA port activity while the power rails are collapsing, so it would be interesting to s...
by siriushardware
Sun Sep 08, 2019 10:53 am
Forum: Hardware
Topic: UltraSatan clears SD card on Atari power off
Replies: 13
Views: 1218

Re: UltraSatan clears SD card on Atari power off

Fair enough, good luck, and please post the solution here if you ever resolve it.
by siriushardware
Sun Sep 08, 2019 10:05 am
Forum: Hardware
Topic: UltraSatan clears SD card on Atari power off
Replies: 13
Views: 1218

Re: UltraSatan clears SD card on Atari power off

If I could get a "good DMA" I'd certainly replaced it. As I've never needed to obtain one myself I don't know how difficult or easy they are to obtain, so you have my sympathies if you have already tried and failed to obtain one. That would certainly explain why you seem to have tried eve...

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