68kMLA Classic Interface
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| Reverse Engineering the Macintosh SE PCB & Custom Chips for 1:1 reproduction | |
| Posted by: Kai Robinson on 2020-10-10 20:35:17 DM me your address and i'll mail one. | |
Posted by: ajacocks on 2020-10-10 23:54:09DM me your address and i'll mail one.Kai, Did you mail me a functional board? Thanks! - Alex | |
| Posted by: Kai Robinson on 2020-10-11 09:15:31 Was it green? If so, no, i'll send you out a new one - Rev 1.4c is the latest. | |
Posted by: cheesestraws on 2020-10-11 10:14:34how is everyone else doing with theirs?The last couple of weeks have been intense at work and my mental health has been poor so progress has been slower than I like. I’ve made decent headway on the passives though... | |
Posted by: techknight on 2020-10-11 13:43:03my mental health has been poor Preaching to the choir there brother. | |
| Posted by: Kai Robinson on 2020-10-13 22:49:05 To show how serious i am about this project...I just bought a working 200MHz, 96 channel logic analyzer from eBay - comes with all 4 Pods, 14/16/18/20 pin DIP analyzer clips, 40 and 48 pin DIP clips and literally every probe going - i even have the floppies in the bag. I've already ordered a Gotek floppy replacement and i have an image of all the disks needed to work it. CRT is crisp as hell, bright, no burn-in. I'm also bidding on a Tektronix Oscilloscope and a hot air station for the SE/30 stuff moving forward. I am 100% COMMITTED to making a working one in the next 12 months, and I have every hope that Rev 1.4c is the final version...  | |
| Posted by: Trash80toHP_Mini on 2020-10-14 15:32:09 Like we needed proof of your dedication? 🙂) I've been watching with much interest, nice toys there, rock on! | |
| Posted by: Kai Robinson on 2020-10-15 22:37:47 Well you know, taking a break can sometimes reduce interest in a project... | |
| Posted by: LaPorta on 2020-10-15 22:50:15 Your dedication is commendable. I only wish I had the background and expertise for this sort of thing. Maybe later in life I can learn. | |
| Posted by: paws on 2020-10-16 06:58:28 Nice tool! I've read that some of those big logic analysers can understand the processor bus cycles and even do disassembly of captures. Does yours do anything like that? | |
| Posted by: Kai Robinson on 2020-10-16 12:34:17 @paws - not sure, i've yet to have a proper dig into it yet or even read the manual - waiting on the Gotek to arrive! | |
| Posted by: paws on 2020-10-16 16:27:34 Even if you just get binary read-outs it's a great help. I've got a 2ch/16 bit Agilent MSO (an old one), and in some cases it's been a fantastic help, but TBH 16 bit just doesn't cut it for 68k systems. I've got at least one reversing project that's stranded on lack of logic analyzer channels, so I'm a little jealous of what you've got. | |
| Posted by: Kai Robinson on 2020-10-16 16:31:15 Well, if you want to undertake the reverse engineering of the SE customs - you're welcome to take the analyzer 😀 | |
| Posted by: chiptripper on 2020-10-17 02:23:29 I've been following (lurking) this project for a while and decided to create an account to say that this is a really worthwhile effort. I'd love to see similar undertakings for other 68K systems. | |
| Posted by: olePigeon on 2020-10-18 18:04:57 Just out of curiosity: if you're going to be cloning the SWIM chip, would it be possible to make it so you can daisy-chain floppy drives like you can on the Apple II? I don't know if there are other hardware limitations, or if it could be implemented via the SWIM chip. | |
| Posted by: techknight on 2020-10-18 21:07:23 I assume repopulating your latest PCB didnt work? | |
| Posted by: Kai Robinson on 2020-10-18 22:32:35 @techknight I've not even started yet - between heart issues and easing back into work again, i've just not had the chance. Ie - on Saturday, I slept for 12 hours straight - i will give it a go this coming weekend though... | |
Posted by: techknight on 2020-10-20 04:13:17@techknight I've not even started yet - between heart issues and easing back into work again, i've just not had the chance. Ie - on Saturday, I slept for 12 hours straight - i will give it a go this coming weekend though...Oh wow. I am sorry to hear that has happened. Hopefully you get well soon and not catch this corona nastiness in the process, wish you the best 🙂 | |
Posted by: joshc on 2020-10-22 10:47:39@techknight I've not even started yet - between heart issues and easing back into work again, i've just not had the chance. Ie - on Saturday, I slept for 12 hours straight - i will give it a go this coming weekend though...Your health comes first, rest up! The SE board will wait as will the rest of us 🙂 | |
| Posted by: Phazmatis on 2020-10-29 14:21:42 If making a custom PCB, it would be interesting to make a SWIM that works with standard IBM floppy drives instead. And/or even IDE hard disks. IMHO more valuable to the future of retromaccing than making a 1:1 SWIM. But! Do whatever is most fun! 🙂 p.s: Sorry to hear about health issues! Hope you feel better soon!! | |
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