Search found 2137 matches

by exxos
Mon Oct 09, 2017 1:02 pm
Forum: FLOPPY DRIVES KITS & UPGRADES
Topic: How to get TOS to see the 1.44MB drives
Replies: 22
Views: 1645

Re: How to get TOS to see the 1.44MB drives

The Mega ST buffer board is on the PCB. As is the Mega ST V2.2 booster. And that does work stable. (Enough to rum Gembench and copy files from floppy to Ultrasatan) This evening I'll make a picture of the setup. And I can try a 16Mhz oscillator as clock source. But I don't like that, it's one more ...
by exxos
Mon Oct 09, 2017 8:49 am
Forum: HARDWARE ISSUES
Topic: Help resolving STE Booster instability?
Replies: 29
Views: 2011

Re: STE Booster instable

There is another possibility, that my CPU-socket construction, which exposes CPU lines vertically for about 5-8mm will be of fault here. When I can rule out the SIMMs I will have to investigate this. It turned out way to high anyways, so I will have to start over with that. ahh yep, I was going to ...
by exxos
Mon Oct 09, 2017 8:18 am
Forum: FLOPPY DRIVES KITS & UPGRADES
Topic: How to get TOS to see the 1.44MB drives
Replies: 22
Views: 1645

Re: How to get TOS to see the 1.44MB drives

TOS does not need to know about the floppy.

Its possible on the MEGA ST the 16mhz has noise causing the issues. You will likely need the mega buffer kit.
by exxos
Sun Oct 08, 2017 5:48 pm
Forum: MEMBER BLOGS
Topic: Boosting STFM: 16MHz bus, 64MHz Shifter
Replies: 116
Views: 7116

Re: Boosting STFM: 16MHz bus, 64MHz Shifter

They look fine there. Though you would have to sample a few seconds and look at every "page" to look for a glitch. I will try and post a example when I get home later of what I mean. You could try this... basically similar to using another FF.. if you have a spare few inverter gates... run the MB DT...
by exxos
Sun Oct 08, 2017 5:40 pm
Forum: HARDWARE ISSUES
Topic: Help resolving STE Booster instability?
Replies: 29
Views: 2011

Re: STE Booster instable

Tried that, but not much change. It still gets instable to the point of not booting, when the cable comes too close to the board on pretty much any spot. Only when I have it at least 5 cm away, it works. I only saw that with parity simms. Basically something else must be floating somewhere. I'll wa...
by exxos
Sun Oct 08, 2017 2:16 pm
Forum: INTRODUCE YOURSELF
Topic: Hello from Australia (ex-UK)
Replies: 2
Views: 404

Re: Hello from Australia (ex-UK)

...My Dad finally fixed the Atari since it just turned out to be a fuse in the PSU, and I started to re-learn the world of Atari. My Dad had hundereds of ST Format magazines and coverdisks, I spent a very long time going through all of these like a treasure trove. I remember F112 stealth fighter be...
by exxos
Sun Oct 08, 2017 1:29 pm
Forum: HARDWARE ISSUES
Topic: Help resolving STE Booster instability?
Replies: 29
Views: 2011

Re: STE Booster instable

Actually..


by exxos
Sat Oct 07, 2017 7:40 pm
Forum: HARDWARE ISSUES
Topic: Help resolving STE Booster instability?
Replies: 29
Views: 2011

Re: STE Booster instable

Yep, that's it :bravo: . I remember the discussion about parity simms, and whethere they have an effect. Turns out that both my sets are partity (4MB with 9 modules, 2MB with 3 modules). I guess this settles the debate then ;) IIRC "rubber_jonnie" also had similar issues.. Yes, I did tell people "e...
by exxos
Sat Oct 07, 2017 4:17 pm
Forum: MEMBER BLOGS
Topic: Boosting STFM: 16MHz bus, 64MHz Shifter
Replies: 116
Views: 7116

Re: Boosting STFM: 16MHz bus, 64MHz Shifter

I think your heading towards DTACK sync issues. Though I would start with the F161 and replace the clocks first. You will have to isolate the DTACK pin from the CPU and run it though a flipflop gate, clock can be 8mhz. Though you may need to add a inverter on the clock input. Or you might be able to...
by exxos
Sat Oct 07, 2017 4:16 pm
Forum: HARDWARE ISSUES
Topic: Help resolving STE Booster instability?
Replies: 29
Views: 2011

Re: STE Booster instable

U405 what is the exact number ? You need the F version, not S. Also you need 8 chip simms, not parity 9 chips. as for cable, just use the thin black cable i supply in the kit, and route it from the ic downwards, then across the front of the simms to the booster. Only time I saw issues with moving th...