Search found 30 matches

by Kai Robinson
Mon Nov 09, 2020 12:21 am
Forum: Terriblefire's channel
Topic: TF for 68k Macintosh?
Replies: 4
Views: 988

Re: TF for 68k Macintosh?

Been working on this myself. Plenty of accelerator cards made for these classic macs over the years - including 68030 ones. The MicroMac cards were huge, too. CPU isn't socketed though, it's soldered. However the SE has an expansion slot that can be used. Not out of the realm of possibility, basical...
by Kai Robinson
Wed Oct 14, 2020 8:40 pm
Forum: ELECTRONICS
Topic: Finding equivalents for old vintage chips?
Replies: 6
Views: 359

Re: Finding equivalents for old vintage chips?

For the IS900 - replace with this: https://uk.rs-online.com/web/p/optocoupler-ics/1718172/

direct pin compatible part, from the same manufacturer.
by Kai Robinson
Tue Sep 22, 2020 9:09 pm
Forum: ELECTRONICS
Topic: Reverse Engineering the Macintosh SE PCB & Custom Chips for 1:1 reproduction
Replies: 21
Views: 1679

Re: Reverse Engineering the Macintosh SE PCB & Custom Chips for 1:1 reproduction

OK - after posting out several of the Rev 1.4c's - i have 6 left - would anyone here like one to build up and test? :)
by Kai Robinson
Fri Sep 18, 2020 7:00 pm
Forum: Terriblefire's channel
Topic: Fake TF536s Bounty (Bound Edition)
Replies: 56
Views: 8455

Re: Fake TF536s Bounty (Bound Edition)

They are called, IIRC from my days of repairing cars, Pattern Parts. It means that consumers have a choice to buy OEM parts at a price premium, or opt for 3rd party parts that are cheaper, but may not meet the same standards of quality demanded by the OEM. They fit, they will work, and they are che...
by Kai Robinson
Wed Sep 16, 2020 10:38 am
Forum: ELECTRONICS
Topic: Reverse Engineering the Macintosh SE PCB & Custom Chips for 1:1 reproduction
Replies: 21
Views: 1679

Re: Reverse Engineering the Macintosh SE PCB & Custom Chips for 1:1 reproduction

To be fair - i'm not a professional by any means - just an enthusiastic hobbyist! I'm looking forward to the day when i turn on the SE and hear 'BOOOOP' followed by the '?' prompt flashing away. I had a few other ideas, such as doing something similar to the Classic ROM - where you have System 6.0.8...
by Kai Robinson
Tue Sep 15, 2020 10:25 pm
Forum: ELECTRONICS
Topic: Reverse Engineering the Macintosh SE PCB & Custom Chips for 1:1 reproduction
Replies: 21
Views: 1679

Re: Reverse Engineering the Macintosh SE PCB & Custom Chips for 1:1 reproduction

troed wrote:
Tue Sep 15, 2020 10:22 pm
Amazing read - thanks for posting! Hope the new version boots cleanly :)

/Troed
So do i! I have to work all week, but on Friday instead of the usual game time with co-workers, i might knock off early and get busy with the resistor packs :D
by Kai Robinson
Tue Sep 15, 2020 9:28 pm
Forum: ELECTRONICS
Topic: Reverse Engineering the Macintosh SE PCB & Custom Chips for 1:1 reproduction
Replies: 21
Views: 1679

Re: Reverse Engineering the Macintosh SE PCB & Custom Chips for 1:1 reproduction

So with them looking that good, i threw myself into it, and after 14 hours, this was the end result: DSC_0173.JPG DSC_0174.JPG Yes, my eyes went funny, and my fingers hurt and were calloused by the end of the day. I don't think i'd slept that night, thinking about it like a kid at christmas :lol: Da...
by Kai Robinson
Tue Sep 15, 2020 9:17 pm
Forum: ELECTRONICS
Topic: Reverse Engineering the Macintosh SE PCB & Custom Chips for 1:1 reproduction
Replies: 21
Views: 1679

Re: Reverse Engineering the Macintosh SE PCB & Custom Chips for 1:1 reproduction

Around about this time, i decided to make a quick video on the old 'tube, just to explain in laymans terms: https://www.youtube.com/watch?v=65ZdIII8t1M I then ordered another set of what i thought were 'fixed' boards. Ooops... Still, when they arrived....OOOOF!!! :shock: :excited: DSC_0162.JPG DSC_0...
by Kai Robinson
Tue Sep 15, 2020 9:08 pm
Forum: ELECTRONICS
Topic: Reverse Engineering the Macintosh SE PCB & Custom Chips for 1:1 reproduction
Replies: 21
Views: 1679

Re: Reverse Engineering the Macintosh SE PCB & Custom Chips for 1:1 reproduction

Upon further signal inspection the i determined that the Apple/Rockwell part labelled 338-6523 is NOT likely to be a 6523 TPI as I had originally thought - the pins match up to the 6522 config instead. So this is a lot of obfuscation on Apple's part but would make the most sense since the 6522 is us...
by Kai Robinson
Tue Sep 15, 2020 8:55 pm
Forum: ELECTRONICS
Topic: Reverse Engineering the Macintosh SE PCB & Custom Chips for 1:1 reproduction
Replies: 21
Views: 1679

Re: Reverse Engineering the Macintosh SE PCB & Custom Chips for 1:1 reproduction

And then i was done. DSC_0008.JPG Looks good, doesn't it? Shame it didn't bloody work and not just due to missing grounds, as i would discover to my horror later on... So, while i put the board back down and began to ponder, i decided to have a crack at the GLU chip, which as the name implies, handl...

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