Search found 305 matches

by stimpy
Fri Oct 03, 2008 12:23 am
Forum: Hardware
Topic: FASTER MMU ?
Replies: 15
Views: 1709

Re: FASTER MMU ?

The Atari ST is built with custom chips (shifter,mmu,glue,dma) and they all shares operations. It would be hard to try and get one to run faster and leave others slower. Overclocking the whole board is the better way, I once had an STFM running at 16Mhz bus, and 32MHz cached 68000 :twisted: Needed a...
by stimpy
Fri Oct 03, 2008 12:18 am
Forum: Hardware
Topic: STFM internal IDE ?
Replies: 124
Views: 14113

Re: STFM internal IDE ?

To get 16MB (well really 14MB) I seem to remember you have to wait a little time after TOS has started up (a reset etc) otherwise it will try placing the screen buffer in the RAM, which the shifter won't have access to. You'll need a CPLD to do the RAM controller, I think Xilinx still make 5v CPLDs.
by stimpy
Tue May 06, 2008 7:33 pm
Forum: Hardware
Topic: best way to remove IC chips on motherboard?
Replies: 16
Views: 2733

Re: best way to remove IC chips on motherboard?

Paint stripper, may ruin the motherboard though. Thru hole is harder than taking off SMD chips I find.
by stimpy
Mon May 05, 2008 11:43 pm
Forum: News & Announcements
Topic: Atari TT hardware
Replies: 22
Views: 5501

Re: Atari TT hardware

if you can read french Rodolphe Czuba give "a way" to made a TT highrez to vga http://groups.google.fr/group/fr.comp.sys.atari/msg/fcf00878dc064d70 Unfortunatly, I think what Rodolphe Czuba is saying is modify the TT which is not really wnat I wanted to do. Also, the chip that creates the ECL signa...
by stimpy
Fri May 02, 2008 1:32 am
Forum: Hardware
Topic: What's this?
Replies: 14
Views: 2731

Re: What's this?

I've a sneaky suspicion that it may be a genlock? I'd say thats probably a good guess there. Theres a wire that looks to go the video port, and a lot of wires attaching to the clock area. I think the ST/Mega ST couldn't do genlocking, without requring extra hardware inside. The STE fixed that issue...
by stimpy
Thu May 01, 2008 3:18 pm
Forum: News & Announcements
Topic: Atari TT hardware
Replies: 22
Views: 5501

Re: Atari TT hardware

A TT high res adapter -- fantastic idea. Any idea how much it would cost? It's not as easy as it first seemed, it doesn't look like it'll work without an extra power source. To drive a VGA monitor requires a fair amount of power, and it doesn't seem possible to pick this power up from current video...
by stimpy
Tue Apr 29, 2008 12:04 pm
Forum: News & Announcements
Topic: Atari TT hardware
Replies: 22
Views: 5501

Re: Atari TT hardware

If you look at the date on that, it's May 2002! I've never did get it finnished, ISA was, and still is a dead end.
by stimpy
Tue Apr 29, 2008 12:08 am
Forum: News & Announcements
Topic: Atari TT hardware
Replies: 22
Views: 5501

Re: Atari TT hardware

The TT high rez mode is really tricky, especailly as I want it to work with no external power source. Theres quite a bit of ghosting/shadow on the screen but this is to be expected on a prototype as the digital signal is 100MHz and the bandwidth needed is huge! http://hardware.atari.org/photos/hitt_...
by stimpy
Mon Apr 28, 2008 12:39 am
Forum: Chat forum [ENG]
Topic: Let's see your desks n stuff?
Replies: 122
Views: 21691

Re: Let's see your desks n stuff?

techie_alison wrote:Thank you to all who have posted so far. This is wonderful. Well ok I'll admit it, I'm just nosey. Please, more pictures.

Here's my workshop (loo) in use.
I suggest you get some more toilet paper! :lol:
by stimpy
Fri Apr 25, 2008 11:04 am
Forum: News & Announcements
Topic: Atari TT hardware
Replies: 22
Views: 5501

Re: Atari TT hardware

I've just got myself an Atari TT and going to have a go at making a couple of hardware addons. 1) A device that plugs between the monitor port and a standard VGA monitor to allow the use all off resolutions, including the special TT high rez 1280x960! A switch will be mounted to flick between the m...
by stimpy
Thu Apr 24, 2008 3:46 pm
Forum: News & Announcements
Topic: Atari TT hardware
Replies: 22
Views: 5501

Atari TT hardware

I've just got myself an Atari TT and going to have a go at making a couple of hardware addons. 1) A device that plugs between the monitor port and a standard VGA monitor to allow the use all off resolutions, including the special TT high rez 1280x960! A switch will be mounted to flick between the mo...
by stimpy
Wed Apr 23, 2008 6:23 pm
Forum: Hardware
Topic: Fix for occasional partitions loss on SatanDisk
Replies: 53
Views: 8102

Re: Fix for occasional partitions loss on SatanDisk

bullis1 wrote:
simbo wrote:you can download the tools for free but its upwards of 300MB to 5GB too download
i just hope the german guy who has the issue to hand can test some code related fixes
He meant for you to post the compiled fix you made, not the tools you used. :|
Correct!
by stimpy
Tue Apr 22, 2008 5:00 pm
Forum: Hardware
Topic: Fix for occasional partitions loss on SatanDisk
Replies: 53
Views: 8102

Re: Fix for occasional partitions loss on SatanDisk

simbo wrote:j
i have recompiled the code and tested it for power up and down hold states
Post the binary up then for others to use, so they don't have to faff about with soldering irons etc.
by stimpy
Mon Apr 07, 2008 12:32 pm
Forum: For sale / Wanted
Topic: WANTED. STF / STFM PSU metal cover
Replies: 2
Views: 1020

Re: WANTED. STF / STFM PSU metal cover

I've got one kicking around, drop me an email if interestted. £2 inc P&P?
by stimpy
Mon Apr 07, 2008 12:30 pm
Forum: Hardware
Topic: TOS patches, what is worth ?
Replies: 15
Views: 1793

Re: TOS patches, what is worth ?

There is a lot of pointers that are set up in the lower portion of RAM. You can see this if you study the ROM comemnted source in the back of ST Internals, and it can make it a right pain to trace the flow through the OS. I had to do this many times on the FPGA ST, and at many points I set up a vide...
by stimpy
Sat Apr 05, 2008 10:09 am
Forum: Hardware
Topic: NetusBee?
Replies: 32
Views: 7412

Re: NetusBee?

I was hoping that once enough people got the USB hardware, from either the NETUS-Bee of EtherNAT that some more drivers would appear, but they haven't yet :cry:
by stimpy
Fri Apr 04, 2008 3:59 pm
Forum: Hardware
Topic: NetusBee?
Replies: 32
Views: 7412

Re: NetusBee?

I am thinking once I have time on my hands around Jully/August I will start selling cut down versions. They will be cheaper and only do Networking. They will use the same PCB though, so can be sent back for the USB upgrade when more drivers are available.
by stimpy
Thu Apr 03, 2008 5:59 pm
Forum: Hardware
Topic: ST keyboard only partly works - any ideas?
Replies: 14
Views: 1769

Re: ST keyboard only partly works - any ideas?

Check for 5v on both chips, maybe write down which keys don't work.
by stimpy
Wed Apr 02, 2008 4:00 pm
Forum: Professionals
Topic: Falcon030 and Compact Flash Adapter
Replies: 24
Views: 4612

Re: Falcon030 and Compact Flash Adapter

Apparantly there are some fixes in the latest HDDriver (8.2/8.3?) that work better with CF. I tried a CF on my Falcon and couldn't get it to do much, but playing with the Demo version looked a lot more promising.
by stimpy
Fri Mar 28, 2008 3:26 pm
Forum: Hardware
Topic: FPGAARCADE Minimig/ST compatible board, comments?
Replies: 75
Views: 12635

Re: FPGAARCADE Minimig/ST compatible board, comments?

Where can I get a look at this Atari ST internals book that Simbo spoke of? Check ebay etc, it was published by Abacus Software along with a few other books from the series. The Atari ST Profibuch is better, but it's only in German :( @simbo, I think we will have to agree to disagree as this could ...
by stimpy
Thu Mar 27, 2008 11:33 pm
Forum: Hardware
Topic: Bus error from Glue or not ?
Replies: 9
Views: 1848

Re: Bus error from Glue or not ?

Ah I see, missed the top line where the invert takes place. Make sense now :)
by stimpy
Thu Mar 27, 2008 10:41 pm
Forum: Hardware
Topic: FPGAARCADE Minimig/ST compatible board, comments?
Replies: 75
Views: 12635

Re: FPGAARCADE Minimig/ST compatible board, comments?

I don't think it means it literally. The DMA requests the data bus from the CPU with the RDY line, and the GLUE then does the arbitration. The Glue tells the CPU that another device (the DMA chip) wants the bus. The CPU then finnishes what its doing (I think within a couple of instructions) and gran...
by stimpy
Thu Mar 27, 2008 9:53 pm
Forum: Hardware
Topic: FPGAARCADE Minimig/ST compatible board, comments?
Replies: 75
Views: 12635

Re: FPGAARCADE Minimig/ST compatible board, comments?

If the ST does pause the clock then it's pretty risky as the 68000 states in the DC electrical spec, min freq of 4Mhz!
by stimpy
Thu Mar 27, 2008 3:16 pm
Forum: Hardware
Topic: FPGAARCADE Minimig/ST compatible board, comments?
Replies: 75
Views: 12635

Re: FPGAARCADE Minimig/ST compatible board, comments?

simbo wrote:mega what
all ataris ST level st ste etc mega machines
all pause the 8mhz clock {interrupt it} to allow for the slower machine
The 8 MHz clock never pauses. The 68000 is not static (apart from the 68SEC000 I believe). Stick a 'scope on the clock.

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