Search found 303 matches

by ctirad
Wed Mar 25, 2020 9:11 pm
Forum: Demos - Requests
Topic: Atari ST Space Ace Demo Vs Amiga Space Demo....and STe??
Replies: 6
Views: 527

Re: Atari ST Space Ace Demo Vs Amiga Space Demo....and STe??

The screen size: Amiga version has a bigger screen size than Atari. Amiga supports overscan and even without that, its screen is wider, because of lower pixelclock. On ST/E you have to use tricks to open the borders. Scenes: The Atari ST version has less scenes than the Amiga one (maybe due to disk...
by ctirad
Fri Mar 13, 2020 9:48 pm
Forum: Hardware
Topic: Installing the PAK68/3
Replies: 136
Views: 16804

Re: Installing the PAK68/3

That's an updated/fixed Frak/2 revision?
I have the original one with all the patches and mods, but I never got it working, so I'm still stucked to Frak/1.
by ctirad
Thu Mar 12, 2020 12:41 pm
Forum: Hardware
Topic: Atari 520ST+
Replies: 4
Views: 473

Re: Atari 520ST+

No, it wasn't. The 520+ name was chosen to avoid confusion with a "large" 1040.
by ctirad
Tue Feb 25, 2020 9:19 am
Forum: Hardware
Topic: Wittich ISA adapter for MegaST
Replies: 20
Views: 1610

Re: Wittich ISA adapter for MegaST

The ALE pin is most probably unconnected.
Some of my AX cards seem to work, but I have no idea what to fill in the 256 color related setup field in VMG4000 app to get proper color output. Unfortunately, none of my AX cards are HC/TC capable.
by ctirad
Mon Feb 24, 2020 5:26 pm
Forum: Hardware
Topic: Wittich ISA adapter for MegaST
Replies: 20
Views: 1610

Re: Wittich ISA adapter for MegaST

I tried NVDI as a driver and W23 does not work at all.

BTW, why the W32 needs an extra handling from the ISA adapter perspective?
by ctirad
Mon Feb 24, 2020 2:44 pm
Forum: Professionals
Topic: Falcon Mod Resurrection.
Replies: 67
Views: 16080

Re: Falcon Mod Resurrection.

Those early Phatom boards actually work perfectly well when installed correctly. On the other side I've seen a couple of profesinally looking SMT variants, that were designed a completely wrong (bad ground layer, decoupling caps placed incorrectly, wrong chips used..).
by ctirad
Thu Feb 20, 2020 7:33 pm
Forum: Hardware
Topic: Wittich ISA adapter for MegaST
Replies: 20
Views: 1610

Re: Wittich ISA adapter for MegaST

But If I got your previous post correctly, there is no W32i capable GAL for the Wittich on megabus?
by ctirad
Thu Feb 20, 2020 5:39 pm
Forum: Hardware
Topic: Wittich ISA adapter for MegaST
Replies: 20
Views: 1610

Re: Wittich ISA adapter for MegaST

Or maybe some kind of autodetection. EmuTOS has an excellent ability to initialize any ET4000 (except W32i) I ever tried in variaous interfaces that normally require different drivers.
by ctirad
Thu Feb 20, 2020 1:05 pm
Forum: Hardware
Topic: Wittich ISA adapter for MegaST
Replies: 20
Views: 1610

Re: Wittich ISA adapter for MegaST

After a couple more tests I found that no updated NOVA driver from Idek works with the card. Neither Mega4000 nor megaSTE. The onlyworking driver os the NOVA 171 provided by frank.lukas. I didn't tried NVDI with NOVA enabled, yet
by ctirad
Wed Feb 19, 2020 1:13 pm
Forum: Hardware
Topic: Modern replacement psu for Tt030 / Mega STE
Replies: 11
Views: 975

Re: Modern replacement psu for Tt030 / Mega STE

I see. That is good to know.
by ctirad
Wed Feb 19, 2020 1:09 pm
Forum: Hardware
Topic: Wittich ISA adapter for MegaST
Replies: 20
Views: 1610

Re: Wittich ISA adapter for MegaST

No it doesn't. The driver just bombs.

BTW, is the modified GAL still capable to handle all kinds of ET4000 boards or just the W32(i)? And what about Mach32/64?
by ctirad
Tue Feb 18, 2020 8:49 pm
Forum: Hardware
Topic: Wittich ISA adapter for MegaST
Replies: 20
Views: 1610

Re: Wittich ISA adapter for MegaST

OK, connecting of the +-/12V ISA pins did the trick. Now all my ET4000 cards except /W32 are recognised by EMUTOS and the driver from frank does work as well. :cheers:
by ctirad
Tue Feb 18, 2020 2:32 pm
Forum: Hardware
Topic: Modern replacement psu for Tt030 / Mega STE
Replies: 11
Views: 975

Re: Modern replacement psu for Tt030 / Mega STE

Thanks. Is it ok to just install a momentary switch between motherboard power OK and GND as a temporary workaround?
by ctirad
Mon Feb 17, 2020 5:03 pm
Forum: Hardware
Topic: Wittich ISA adapter for MegaST
Replies: 20
Views: 1610

Wittich ISA adapter for MegaST

I have this ISA adapter Wittich Computer GMBH 1991. If I'm not mistaken it should be a predecessor of NOVA and shloud be 16bit. I tried it with a couple of ET4000 and one ET4000/W32 card, but none work. I tried NOVA and VOFA drivers from Idek (bombs) and EmuTOS built-in driver. The later one seem to...
by ctirad
Mon Feb 17, 2020 4:44 pm
Forum: Hardware
Topic: Modern replacement psu for Tt030 / Mega STE
Replies: 11
Views: 975

Re: Modern replacement psu for Tt030 / Mega STE

This looks like a good place to ask. I obtained a two TT boards for a diagnostic and repair, but no PSU. I plan to use AT or ATX PSU for the testing, but I'm not sure what I should do with the "power ok" pin. Is it OK to left it alone or it does need some special care?
by ctirad
Sun Feb 09, 2020 10:57 pm
Forum: Hardware
Topic: 520ST keyboard to USB adapter?
Replies: 5
Views: 624

Re: 520ST keyboard to USB adapter?

I've been thinking many times about patching Aranym to directly talk to an external Atari kebyoard instead of IKBD emulation. Jest a simple USBSerial or direct UART interface and voila, instantly working keybord, mouse and joystick ports ready to use. Profit! ;)
by ctirad
Fri Jan 24, 2020 4:46 pm
Forum: Professionals
Topic: Falcon Mod Resurrection.
Replies: 67
Views: 16080

Re: Falcon Mod Resurrection.

You shlould be 100% sure that all clocks a and power are OK, before you touch anything else. The 8Mhz on the CPU input is only sign, that something was not initialised properly at power on. The CPU clock is normally switchable between 16 and 8 MHz by software. What display do you use, BTW, and what ...
by ctirad
Thu Jan 16, 2020 9:24 am
Forum: Professionals
Topic: Falcon Mod Resurrection.
Replies: 67
Views: 16080

Re: Falcon Mod Resurrection.

Ah, that damn Dallas. That is good point, indeed.
by ctirad
Thu Jan 16, 2020 9:17 am
Forum: Professionals
Topic: Falcon Mod Resurrection.
Replies: 67
Views: 16080

Re: Falcon Mod Resurrection.

Is it ok for me to remove the Phantom Se and leave the clock patch in? When the clocks are OK, there is no need to remove the clock patch. The pins that needed to be pulled or cut for the Phantom mod are not going back in So I either create jumpers of some kind or replace the chips. Just create the...
by ctirad
Sat Jan 04, 2020 12:51 pm
Forum: Professionals
Topic: Falcon Mod Resurrection.
Replies: 67
Views: 16080

Re: Falcon Mod Resurrection.

The 500Khz clock is created by dividing the 32MHz CLK32 from L102, so the main clock is most probably OK. I'm not sure we can trust your meter at high MHz, though. Maybe will be better to restore the orignal CLK32 path by removing all three wires between a Phantom card, L102 and R234. And replace L1...
by ctirad
Fri Jan 03, 2020 10:01 pm
Forum: Professionals
Topic: Falcon Mod Resurrection.
Replies: 67
Views: 16080

Re: Falcon Mod Resurrection.

Are you sure that you measure it right? The 32MHz at right pad of the L102 is an ouptut from Falcon's system clock oscillator (CLK32).
by ctirad
Wed Jan 01, 2020 3:43 pm
Forum: Professionals
Topic: Falcon Mod Resurrection.
Replies: 67
Views: 16080

Re: Falcon Mod Resurrection.

The correct readings are following: Right pad of L102 - permanent 32MHz ACIA clocks - allways 500Khz R234 (removed) - 32MHz at both pads DSP (blue wire) - 32Mhz Clock patch: 16MHz at all three outputs (white wires at top) and input from R217 resistor and SDMA (long blue wire). Also note the red wire...
by ctirad
Wed Dec 18, 2019 3:00 pm
Forum: Professionals
Topic: Falcon Mod Resurrection.
Replies: 67
Views: 16080

Re: Falcon Mod Resurrection.

It shloud work.
by ctirad
Tue Dec 17, 2019 6:47 pm
Forum: Professionals
Topic: Falcon Mod Resurrection.
Replies: 67
Views: 16080

Re: Falcon Mod Resurrection.

So as per the OP I think the only real way to get this Falcon working is to remove this. You don't need to remove it. Just check the 32MHz clock is present on the right pad of (removed) L102 and on both of the wires leading to the point marked (4) on the wiring picture. Also there shloud be 16MHz o...
by ctirad
Mon Dec 16, 2019 7:24 pm
Forum: Professionals
Topic: Falcon Mod Resurrection.
Replies: 67
Views: 16080

Re: Falcon Mod Resurrection.

There are two pads, that are internally connected togeter. It is 500kHz output clock signal for the ACIA chips (keyboard and MIDI)

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