68kMLA Classic Interface

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Macintosh SE/30 logicboard recreation (thread revival)
Posted by: robin-fo on 2022-04-27 13:08:40 And… it’s alive! I ended up socketing the chips, and swapping in the VIAs got it going. Thanks again to Bolle for doing this - and also for revising the board so that the latest rev has the right footprints. That's great news! Well done!
Posted by: daanvdl on 2022-05-03 08:38:44 Hi all, I created a 3D STL model for the RESET and INTERRUPT button right angle support (for use with the ALPS SKHCBHA010). It doesn't have the bottom prongs but I found out that it doesn't affect the firmness much. This model will fit on the original and the Bolle board. You can download it over here: https://van-de-lagemaat.com/se30/bottenholder-final.stl 3D Printer settings: 80% infill 0.2mm quality no support
Posted by: cannfoddr on 2022-05-26 00:50:28 I am in the UK and am thinking about ordering some of these. Basic green boards with the bottom side populated from the BOM/Parts Placement. I have at least one donor board that is in pretty bad shape. 1. Is anyone else interested in one of these - looks like minimum order is 5? 2. Can anyone give me a quick rundown of which options I need to specify from JLPCB - board thickness, etc...? Thanks
Posted by: CircuitBored on 2022-05-26 00:55:09 Is anyone else interested in one of these - looks like minimum order is 5? I am! I'm in the UK too and have been meaning to get one of these new PCBs for a while.
Posted by: APPLCOLC on 2022-06-09 11:21:08 Is this still being sold? edit: My bad I misread parts of the thread. Don’t answer the question, my apologies.
Posted by: mg.man on 2022-06-09 11:26:50 @CircuitBored, @cannfoddr, I believe @Kai Robinson might have one or more available - you might want to drop him a PM.
Posted by: APPLCOLC on 2022-06-10 07:21:38 Is this sold as a completed kit or is it just a board file with a BOM? I apologize if I’m being a dumbass here.
Posted by: joshc on 2022-06-10 08:09:41 Is this sold as a completed kit or is it just a board file with a BOM? I apologize if I’m being a dumbass here. No, just a board file with a BOM.
Posted by: xporadio on 2022-06-10 14:21:20 I have my boards on the way, and I have an old mac IIcx board that I will be harvesting all the parts from. I will let everyone know the progress as I'm curious to see how many of the parts required will be available on the IIcx board. It looks like most of them will work when comparing images of an Se/30 board and a IIcx. Of course I will be ordering dip sockets, PGA cpu, pga socket, roms seperately.
Posted by: Kai Robinson on 2022-06-11 19:08:17 @CircuitBored, @cannfoddr, I believe @Kai Robinson might have one or more available - you might want to drop him a PM. None left i'm afraid. I won't be putting an order in til after August either.
Posted by: daanvdl on 2022-06-19 04:54:27 Work in progress
Posted by: rplacd on 2022-06-20 03:15:33 Off-topic question to people assembling boards: are y'all scavenging from bombed boards, or is there a source for NOS ASICs that I'm somehow missing? I've been looking far and wide for a replacement for an SE/30 GLUE chip that might be malfunctioning.
Posted by: cheesestraws on 2022-06-20 03:40:19 is there a source for NOS ASICs that I'm somehow missing? I think anyone that claims to have lots of ASICs for these should probably be treated with moderate suspicion, unfortunately. As far as I know there's no reliable source other than bombed boards.
Posted by: daanvdl on 2022-07-08 11:54:19 For those who are interested; I measured the ferrite beads located at L22,L20,L19,L18,L17,L16,L15,L14,L13,L12,L11,L10,L9,L8 with my VNA. Hereby a sweep resistance output from 1Mhz to 500Mhz. M1 is at 100Mhz 92Ohm with a low Q factor. Taiyo Yuden FBMJ4516HS111-T is matching this curve.
Posted by: cheesestraws on 2022-07-08 12:11:49 I measured the ferrite beads located at L22,L20,L19,L18,L17,L16,L15,L14,L13,L12,L11,L10,L9,L8 with my VNA. That's some serious dedication to getting the right ferrite. Thankyou 🙂
Posted by: daanvdl on 2022-07-08 13:09:51 Thanks🙂 Beside this, i found some beautiful good fitting replacement parts for L1 and L2 which aren't on the BOM list; L1 HALO LD11-0246FLF L2 Laird Performance Materials 29F0303-0T0-10
Posted by: daanvdl on 2022-07-31 09:50:08 Anyone have a clue? Doesn’t seems to be related to ROM, RAM, VIAs, SCSI PLCC or FPU. Removing them doesn’t affect the pattern).
Posted by: robin-fo on 2022-08-01 02:22:57 Anyone have a clue? Doesn’t seems to be related to ROM, RAM, VIAs, SCSI PLCC or FPU. Removing them doesn’t affect the pattern). Bad VRAM? Does it go away after 10 minutes?
Posted by: cannfoddr on 2022-08-14 12:00:00 None left i'm afraid. I won't be putting an order in til after August either. Kai, any plans to order more - I am in UK and now have 2 possible donor boards - just got a new one on the ‘finds’ thread. We could go 50:50 on something maybe?
Posted by: rplacd on 2022-08-26 03:19:25 Bad VRAM? Does it go away after 10 minutes? Alternatively, might be the video PALs, since the pattern has a repeating structure (I think the socketed chips above the RAM sockets.)
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