Search found 305 matches
- Thu Dec 07, 2017 3:00 pm
- Forum: MiSTer
- Topic: Minimig and Hybrid emulation.
- Replies: 26
- Views: 13453
Re: Minimig and Hybrid emulation.
Had another thought on this. If the processor was emulated on the ARM would the RAM also need to be on the ARM side to achieve the expected speed?
- Thu Nov 30, 2017 11:08 am
- Forum: MiSTer
- Topic: Minimig and Hybrid emulation.
- Replies: 26
- Views: 13453
Re: Minimig and Hybrid emulation.
...thinking about this more, if it needs to be a cycle accurate system (where FPGA is king) to run certain games and demos then adding a super fast 68000 will break it in most cases. The MegaSTE could be switched down to 8MHz for this very reason.
- Wed Nov 29, 2017 1:59 pm
- Forum: MiSTer
- Topic: Minimig and Hybrid emulation.
- Replies: 26
- Views: 13453
Re: Minimig and Hybrid emulation.
I'm well aware the diferences between FPGAS and prcoessors
I see now that the emulators are not as good as I assumed, I thought that would be sorted considering we are +30 years on the tech...

- Tue Nov 28, 2017 7:48 pm
- Forum: MiSTer
- Topic: Minimig and Hybrid emulation.
- Replies: 26
- Views: 13453
Re: Minimig and Hybrid emulation.
Out of interest, why not just use the arm to run an emulator? The emulators are cycle accurate are they not?
- Thu May 18, 2017 7:53 pm
- Forum: Hardware
- Topic: Looking for source for 1.27mm pitch headers
- Replies: 12
- Views: 3905
- Wed Apr 05, 2017 3:17 pm
- Forum: Chat forum [ENG]
- Topic: New addition to the collection
- Replies: 27
- Views: 11832
Re: New addition to the collection
Looks like its had audio modifications done too.
- Thu Mar 02, 2017 12:06 pm
- Forum: Hardware
- Topic: 4MB Upgrade & 16MHz Booster progress
- Replies: 721
- Views: 161117
Re: 4MB Upgrade & 16MHz Booster progress
Basically the round up is I have the CPU running ASYNC finally and had it running at 25MHz. I couldn't go any higher (didn't have anymore osc's to hand) but the CPU E-clock running faster causes the ACIA to screw up. After a lot of work, I gave up and decided to do a new test board using the 68SEC0...
- Tue Feb 28, 2017 10:55 am
- Forum: Hardware
- Topic: Available open 68000 cores ?
- Replies: 18
- Views: 5876
Re: Available open 68000 cores ?
Wolfgang does drop in testing, http://experiment-s.de/en/gallery/ Perhaps he tested his cpu core in a real ST motherboard, but I can't tell from the photos. I did talk to Wolfgang a few years ago, and I am not sure he did direct replacements as such. I think he said a lot of signals were not used/n...
- Mon Feb 13, 2017 2:58 pm
- Forum: Hardware
- Topic: BAD DMA - Myth or fact ?
- Replies: 97
- Views: 45700
Re: BAD DMA - Myth or fact ?
Not sure if this helps but you might want to try a lot more patterns of test data like the sort used for testing memory. All high, all low, bit walking, ones and zeroes, lfsr etc etc.
- Sun Jan 29, 2017 9:13 am
- Forum: Professionals
- Topic: Why so hard to de-solder some parts?
- Replies: 7
- Views: 2662
Re: Why so hard to de-solder some parts?
Hi, you can use a hot air gun at low heat and carefully heat up the section of the board where you want to solder. If the board (especially the large ground planes) already has a temperature of ~50 degrees celsius it´t much easier to solder those ground pins. Perhaps you can test the best temperatu...
- Tue Nov 29, 2016 3:24 pm
- Forum: CosmosEx
- Topic: Data corruption with CosmosEx SD card (Falcon/SCSI)
- Replies: 99
- Views: 63502
Re: Data corruption with CosmosEx SD card (Falcon/SCSI)
What termination resistor packs are you using on the CosmosEx? I measured them and they do not seem to be the standard SCSI 220/330 ohm resistor networks (200/330 ohm resistor packs are used internally in the Falcon as well). Could the termination of the CosmosEx be a problem? Well, maybe, but my c...
- Sat Oct 15, 2016 6:18 pm
- Forum: Hardware
- Topic: Amiga 600 Vampire 2 accelerator board
- Replies: 106
- Views: 34111
Re: Amiga 600 Vampire 2 accelerator board
IIRC they used a 68000 , SEC I think ? Which seems to push beyond 50mhz. I did look into that, but the ST needs 3 wire bus handshakes, The SEC only has 2, so I gave up with that "direction". The 68HC000 only seems to touch at 38Mhz before dieing. From what I can remember the 2 wire bus grant is pre...
- Wed Aug 24, 2016 10:13 am
- Forum: Applications
- Topic: Magic 6.20 page
- Replies: 88
- Views: 36489
Re: Magic 6.20 page
Install NVDI?
- Thu Jul 28, 2016 7:48 am
- Forum: For sale / Wanted
- Topic: HD-Driver v7.8 for sale
- Replies: 10
- Views: 6625
Re: HD-Driver v7.8 for sale


- Wed Jul 27, 2016 7:34 pm
- Forum: For sale / Wanted
- Topic: HD-Driver v7.8 for sale
- Replies: 10
- Views: 6625
Re: HD-Driver v7.8 for sale
Free now, just pay postage, or its going in the bin!
- Mon Jul 04, 2016 5:34 pm
- Forum: Hardware
- Topic: STE BAD RAM (not bad simms)
- Replies: 44
- Views: 12283
Re: STE BAD RAM (not bad simms)
How about driving a signal when a fault occurs so you can trigger your scope? Something fast, maybe a read in the rom port address range and use the active low ROM3 or ROM4 signal.
- Tue May 03, 2016 3:33 pm
- Forum: Hardware
- Topic: CPU speed discrepancies oddity
- Replies: 65
- Views: 18993
Re: CPU speed discrepancies oddity
Hit the CPU or booster with freezer spray. See if that makes a good CPU bad, or the reverse, a bad CPU good. Sounds like timing issues. 

- Thu Apr 21, 2016 12:17 pm
- Forum: Hades / Milan
- Topic: Xilinx XACT software for Hades chips
- Replies: 3
- Views: 14389
Re: Xilinx XACT software for Hades chips
You can probably use the latest software, they are CPLDs I think. Lab Tools I think here:
http://www.xilinx.com/support/download/ ... tools.html
http://www.xilinx.com/support/download/ ... tools.html
- Tue Apr 05, 2016 3:30 pm
- Forum: For sale / Wanted
- Topic: HD-Driver v7.8 for sale
- Replies: 10
- Views: 6625
Re: HD-Driver v7.8 for sale
Bump, £10 including postage.
- Sun Mar 20, 2016 2:30 pm
- Forum: Hardware
- Topic: What about an embedded web server?
- Replies: 21
- Views: 8582
Re: What about an embedded web server?
About 15 years ago I saw a Mint instalation taking an Xwindow from a linux box to browse the web. Was pretty smart to see but with the Raspberry Pi 3 with Wi-Fi hooked to the DMA port I can imagine it would be much faster. Some kind of simple compression may help too, for plain websites at least, an...
- Sun Mar 20, 2016 8:31 am
- Forum: For sale / Wanted
- Topic: HD-Driver v7.8 for sale
- Replies: 10
- Views: 6625
Re: HD-Driver v7.8 for sale
£10 or 15 euros seems reasonable.
- Sat Mar 19, 2016 6:25 pm
- Forum: For sale / Wanted
- Topic: HD-Driver v7.8 for sale
- Replies: 10
- Views: 6625
HD-Driver v7.8 for sale
Not sure what its worth, original sales invoice from Systems Solutions 1998!
Offers, can take Paypal and ship world wide.

- Thu Mar 17, 2016 10:14 am
- Forum: Hardware
- Topic: Homebrew Atari ST ?
- Replies: 86
- Views: 24924
Re: Homebrew Atari ST ?
...that supporting tricks used by demos isn't neccesary if the FPGA is configured to be the same as the ST at a logic level. Which the Suska project strives to be.joska wrote:What are you referring to?stimpy wrote:Yet again more mis-information about FPGAs
- Wed Mar 16, 2016 2:27 pm
- Forum: Hardware
- Topic: Homebrew Atari ST ?
- Replies: 86
- Views: 24924
Re: Homebrew Atari ST ?
Yet again more mis-information about FPGAs 

- Fri Feb 26, 2016 5:48 pm
- Forum: Professionals
- Topic: Falcon Mod Resurrection.
- Replies: 68
- Views: 22099
Re: Falcon Mod Resurrection.
If it is related to the type of RAM card then I think it was something to do with the Videl RAM access and the fact the Atari 14MB card has so many DRAM chips that it loads the bus heavily. I used to use it with speckles until I got around to replacing the memory card.