Search found 4377 matches

by exxos
Wed Dec 12, 2018 3:24 pm
Forum: MONGREL EDITION (version 2)
Topic: SMT capacitors
Replies: 0
Views: 5

SMT capacitors

As long as it doesn't annoy people to much.. I plan the replace the decoupling caps (leaded) with SMT ones.. Reason is mostly to declutter the topside a bit, plus the caps can go on the rear of the board, so they will be a tiny bit closer to the power pins on each chip. It may help the autorouter no...
by exxos
Wed Dec 12, 2018 3:11 pm
Forum: MONGREL EDITION (version 2)
Topic: POWER CONNECTORS
Replies: 11
Views: 70

Re: POWER CONNECTORS

Good morning exxos.. personally what you have is fine by me. There's no internal DMA port so beyond the Gotek I have no need for additional power. If you had added the additional power ports I just wasn't going to populate them. That reminds me I want to add the internal DMA port like the mega has....
by exxos
Wed Dec 12, 2018 2:57 pm
Forum: MONGREL EDITION (version 2)
Topic: POWER CONNECTORS
Replies: 11
Views: 70

Re: POWER CONNECTORS

I wanted to take a minute to give you a thumbs up on the power supply design. I ran the mega 4 all day yesterday with bench 6 with the case on. After running all day you couldn't feel any hot spots on the case after 8 hrs of running. That was not true of the atari supply. Your supply really runs co...
by exxos
Wed Dec 12, 2018 2:52 pm
Forum: MONGREL EDITION (version 2)
Topic: POWER CONNECTORS
Replies: 11
Views: 70

Re: POWER CONNECTORS

stephen_usher wrote:
Wed Dec 12, 2018 2:47 pm
Someone could make a cable and bring the power to the outside as a socket (USB?) and then power an external device, such as an UltraSatan directly from the machine. One less wall wart.
Wonder if we could squash in a DC jack on the rear somewhere... Hmmm....
by exxos
Wed Dec 12, 2018 2:12 pm
Forum: MONGREL EDITION (version 2)
Topic: POWER CONNECTORS
Replies: 11
Views: 70

Re: POWER CONNECTORS

I will add more power ports, just no idea what will use them.
by exxos
Wed Dec 12, 2018 10:14 am
Forum: MONGREL EDITION (version 2)
Topic: POWER CONNECTORS
Replies: 11
Views: 70

Re: POWER CONNECTORS

What are people actually using these power points for other than floppy ? Any upgrades should have their own power pins on expansion headers, or pickup power close to whatever is plugging in internally like ultrasatan.
by exxos
Tue Dec 11, 2018 10:43 pm
Forum: MONGREL EDITION (version 2)
Topic: RGB DAC ADDED
Replies: 0
Views: 33

RGB DAC ADDED

Before...
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After...


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I guess something to ponder next is if to add a multiplexer to switch MONO to the RGB buffers...
by exxos
Tue Dec 11, 2018 10:19 pm
Forum: MONGREL EDITION (version 2)
Topic: RESET CIRCUIT
Replies: 0
Views: 25

RESET CIRCUIT

Before..
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After :)

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Pondering that the /MR should have a pull up on there as well...

EDIT:

pdf says 63K internal pull up.. I guess it be ok like that, better than these 1meg+ rubbish some chips have!
by exxos
Tue Dec 11, 2018 10:13 pm
Forum: ALPHA USER BUILDS
Topic: Forgottenmyname - Progress - Part 2
Replies: 17
Views: 157

Re: Forgottenmyname - Progress - Part 2

Hopefully things go well :thumbup:
by exxos
Tue Dec 11, 2018 9:48 pm
Forum: MONGREL EDITION (version 2)
Topic: POWER CONNECTORS
Replies: 11
Views: 70

POWER CONNECTORS

What format do people want these ? There is the PSU connector pinout, or the floppy header pinout... Assume just more floppy power pinouts is what people want ?

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