In case it's really broken, do you mind -- instead of tossing it into the bin -- sending it to me? (I can pay for the postage.) I always wanted to (try to) decap a -20 IC, but they're so rare...

Yes, they are compatible.

exxos wrote: ↑

Mon Oct 19, 2020 9:49 pm

Never heard of a -20 glue ?

The first STs has a chipset made by Universal Semiconductors: https://temlib.org/AtariForumWiki/image ... jokker.jpg

Exxos's shop is a positive example, imho, because it allows free form input of the address. One would assume that the buyer knows best how to format their address. I hate it when shops force me to enter my address in the wrong format. E.g., some US shops insist on you filling something into the "sta...

What do you mean by maximum input voltage? On the LED side? That would be 1 - 2 volts, whatever the exact forward voltage of an infrared LED is. I mean, it's just an LED! Do as you would do with any LED: install a current limiting resistor appropriate for your input voltage in order to stay below th...

Steve wrote: ↑

Tue Oct 13, 2020 6:29 pm

Thank you for the information. This is TT only. So is the PC111 a recommended optocoupler for both MSTE and TT?

Yes, it is.

Disclaimer: Of course, like with any PSU work, be sure to re-test with the dummy load after changing the opto-coupler to be sure that the output voltages are correct.

Note that if this PSU is ever intended to go into a Mega STE, the optocoupler should be changed. Search the older threads for possible replacement part numbers. The optocoupler in the pictured PSU is known to cause 50 Hz output ripple that becomes visible as slight flickering of the screen in the Me...

For sure, eBay will have a process for copyright owners (I assume you own the copyright to Gembench) to take down auctions that infringe on their rights. However, like I said, imho there are better ways to spend your time. EDIT. As for authors actively submitting their SW to the distribution houses:...

If you look at what else he's selling https://www.ebay.fr/sch/flam-elec/m.html?item=153785209835&rt=nc&_trksid=p2047675.l2562&_clu=2&_fcid=71&_localstpos&_stpos&gbr=1 (NSFW (!) , you'll see what I mean ;) ) you can see that he's also selling AHDI on a floppy, which is not his to sell, either. Probab...

I think Frank is wrong here. Every address can be also accessed as a 16-bit wide port by settings /DSACKn accordingly, like you do. However, 68030 dynamic bus sizing is quite complicated. Did you implement all the cases for the combinations of of SIZ1, SIZ0, and A0 as described by 68030UM? In partic...

Usually, JTAG programming/debugging hardware can replay a SVF (serial vector format) file, which is just a list of JTAG commands and expected responses. You can use Xilinx Impact to create said SVF file for the firmware.