Recent content by markgeek36

how are you handling the soft power on?

"soft" power not software. its a board inside of the power supply that does it called trickle 5v. this senses when you press the button and tells the psu to turn on. at this point the computer is off so no software can run.

its not software start its a 5v standby that the little daughterboard generates when you press the power button on the keyboard. afaik a generic atx 5v standby does the samething?

I have a IIsi with a very dead psu. So I am looking to replace it with a pico atx. My main question is will any 120vac pico atx work? do I need anything special? I do still have the apple connector but I just need to depin it.

the l1a2165 asic

i was wondering anyone had dumped the roms? the card itself doesn’t have a lot going on so it must of had some sort of serial to token ring/coax adapter

the l1a2165 turns out to be a asci made by LSI Logic

took the logic board out of a Mac SE today that ive had for awhile but never took out the board. I found an interesting surprise which is what im showing here. Unfortunately the CPU and ROM seem to be a custom part number that I can't figure out. googling their models numbers gets you nothing...

cleaned my corroded classic II board and removed the yucky caps. they were so bad most of them had the markings removed. is there some source I can find this info? the bormarc schematics are for a different revision then what I have. and even if it does show them I can't make heads of tails of...

the board worked when i found this(outside believe it or not) however it doesn’t work now. i don’t think it boots at all but its been a long time since i last tested. so any advice on cleaning? i’d assume baking soda and a toothbrush? also i’m a very basic novice at soldering but this would be...

So have any caps leaked? it’s really hard to tell if they have i’m not seeing any wetness. the cap i did take off looked fine. what’s the best stuff to use to remove it? i did a very basic wash with cold water but we have very hard water here so i may end up using distilled water. just using a...

So i’m not sure if this is the right section if it’s not please delete. I have what i thought was a mac classic II logic board but it doesn’t really match the bomarc schematics i found. Can someone tell me if this indeed is a mac classic II? if not what it is and i’m wondering how i got it...

where can i get this?

heic is not an apple format its an industry standard. however im not sure if Windows supports it. google supports it and there are converts you can download to convert it to jpg. i believe photoshop will read it as well.  heic is a mpeg standard however not everyone supports it yet.

have you checked the video board?