paws Posted October 16 Report Share Posted October 16 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. Quote Link to post Share on other sites
Kai Robinson Posted October 16 Author Report Share Posted October 16 Well, if you want to undertake the reverse engineering of the SE customs - you're welcome to take the analyzer Quote Link to post Share on other sites
claanu Posted October 17 Report Share Posted October 17 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. Quote Link to post Share on other sites
olePigeon Posted October 19 Report Share Posted October 19 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. Quote Link to post Share on other sites
techknight Posted October 19 Report Share Posted October 19 I assume repopulating your latest PCB didnt work? Quote Link to post Share on other sites
Kai Robinson Posted October 19 Author Report Share Posted October 19 @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... Quote Link to post Share on other sites
techknight Posted October 20 Report Share Posted October 20 (edited) On 10/19/2020 at 1:32 AM, Kai Robinson said: @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 Edited October 20 by techknight Quote Link to post Share on other sites
joshc Posted October 22 Report Share Posted October 22 On 10/19/2020 at 6:32 AM, Kai Robinson said: @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 Quote Link to post Share on other sites
Phazmatis Posted October 29 Report Share Posted October 29 (edited) 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!! Edited October 29 by Phazmatis Quote Link to post Share on other sites
Torbar Posted October 30 Report Share Posted October 30 23 hours ago, Phazmatis said: If making a custom PCB, it would be interesting to make a SWIM that works with standard IBM floppy drives instead. I like the idea of not being stuck with using the Apple drives, but the problem you'd run into with the IBM floppy drives, is it won't be able to handle 400k/800k disks, since there's a difference between how the drives read the disks/tracks. Which is why, to write a 800k/400k disk, you need a Mac with a built in floppy drive. Someone that knows more can probably explain in better detail why exactly that is?(Or if I'm wrong, tell me that too) Quote Link to post Share on other sites
quorten Posted October 31 Report Share Posted October 31 Yeah, actually @Torbar, have you seen the FluxEngine? This basically is a board that uses IBM drives and a custom floppy disk controller to be able to read/write other formats like Macintosh 400k and 800k, via flux image streaming to a powerful computer... point in hand, it definitely should be possible. Quote Link to post Share on other sites
Torbar Posted October 31 Report Share Posted October 31 11 hours ago, quorten said: Yeah, actually @Torbar, have you seen the FluxEngine? This basically is a board that uses IBM drives and a custom floppy disk controller to be able to read/write other formats like Macintosh 400k and 800k, via flux image streaming to a powerful computer... point in hand, it definitely should be possible. I have not heard of it, but just looked into it a bit. That's really cool! Quote Link to post Share on other sites
Kai Robinson Posted November 4 Author Report Share Posted November 4 Well, apologies for the delay, been 'busy' with work lately and had 0 free energy left at the end of the day! However, thanks to Rob Taylor, the man responsible for getting me into the reverse engineering in the first place, I now have a new toy to play with! Finally a proper PAL dumper! Will get a ZIF socket but i have everything else I need - anyone else want one? Quote Link to post Share on other sites
Kai Robinson Posted November 4 Author Report Share Posted November 4 @Torbar that parcel is finally on track to arrive, too - bloody customs wanted £15 to release it!! :o Quote Link to post Share on other sites
Torbar Posted November 4 Report Share Posted November 4 (edited) 1 hour ago, Kai Robinson said: @Torbar that parcel is finally on track to arrive, too - bloody customs wanted £15 to release it!! :o I thought it was supposed to be only for packages over like £125 had a customs charge, but apparently not. that stinks! Edited November 4 by Torbar Quote Link to post Share on other sites
Kai Robinson Posted November 4 Author Report Share Posted November 4 I think i can claim it back....i think Quote Link to post Share on other sites
Torbar Posted November 5 Report Share Posted November 5 Not to turn this thread into an international shipping practices thread , but the first shipment wasn't held for customs payment or anything, right? only this most recent one? Quote Link to post Share on other sites
max1zzz Posted November 5 Report Share Posted November 5 (edited) 18 hours ago, Torbar said: I thought it was supposed to be only for packages over like £125 had a customs charge, but apparently not. that stinks! "Gifts" up to a value of £35 or "Commercial Shipments" up to a value of £19 attract no import charges (That's including the cost of postage, and due to the cost of shipping these days almost no shipments will fall under these limits) anything over this will attract import VAT (20% + a £8 - £12 handling charge). There is a point where shipments may also attract duty or other import charges but I'm not 100% sure at what value this is Sometimes packages will slip through without getting a charge applied to them, but this is unfortunately quite rare Yeah, shipping into the UK sucks Edited November 5 by max1zzz Quote Link to post Share on other sites
Torbar Posted November 5 Report Share Posted November 5 3 minutes ago, max1zzz said: "Gifts" up to a value of £35 or "Commercial Shipments" up to a value of £19 attract no import charges (That's including the cost of postage, and due to the cost of shipping these days almost no shipments will fall under these limits) anything over this will attract import VAT (20% + a £8 - £12 handling charge). There is a point where shipments may also attract duty or other import charges but I'm not 100% sure at what value this is Sometimes packages will slip through without getting a charge applied to them, but this is unfortunately quite rare Yeah, shipping into the UK sucks Ah, thanks for clearing that up. That sucks. Not sure what I put down as the value of the first shipment, and if I put it as a gift or a commercial shipment, but I'm sure the value+postage was over 35GBP (Postage alone was 20GBP), so that one must have slipped by. first one I did the customs form by hand, 2nd one I did online. Maybe the first one they couldn't read my handwriting Quote Link to post Share on other sites
cheesestraws Posted November 5 Report Share Posted November 5 @Kai Robinson sorry to drag this back to original topic could you post the latest version of the BOM? Perhaps I'm missing something but the only version I could see here, you said you'd made some changes to after it was posted, I think... Quote Link to post Share on other sites
Kai Robinson Posted November 6 Author Report Share Posted November 6 Yes mate, let me dig it out Quote Link to post Share on other sites
cheesestraws Posted November 6 Report Share Posted November 6 Cheers! I've finally managed to feel human enough to concentrate on it Quote Link to post Share on other sites
Kai Robinson Posted November 7 Author Report Share Posted November 7 * Partlist from file: MacintoshSE.lay6" / 07/11/2020 00:32:29 * * Name Value * C1 100nF C2 100nF C3 100nF C4 33uF 16v C5 33 pF C6 100nF C7 100nF C8 100nF C9 100nF C10 100nF C11 33uF 16v C12 100nF C13 33uF 16v C15 100nF C16 33uF 16v C17 100nF C18 33pF C19 10pF C20 100nF C21 100nF C22 100nF C23 100nF C24 100nF C25 100nF C26 33uF 16v C27 100nF C28 100nF C29 100nF C30 100nF C31 100nF C32 33uF 16v C33 100nF C34 33uF 16v C35 100nF C36 1uF 16v C37 33uF 16v C38 33uF 16v C39 100nF C40 68pF C41 100nF C42 100nF C43 100nF C44 100nF C45 100nF C46 100nF C47 100nF C48 100nF C49 100nF C50 100nF C51 100nF C52 100nF C53 100nF C54 100nF C55 100nF C56 100nF C57 100nF C58 100nF C59 100nF C60 100nF C61 100nF C62 33uF 16v C63 100nF C64 100nF C65 100nF C66 100nF C67 100nF CR1 1N4150 CR2 1N4150 CR3 1N4150 J1 EAR Kobiconn 161-3520-EX J2 SERIAL TE 5749268-1 J3 SERIAL TE 5749268-1 J4 EXT SCSI Amphenol L77SDB25S1ACH4R J5 INT SCSI Molex 87831-5019 J6 EXT FLOPPY J7 UPPER DRIVE Molex 87831-5920 J8 LOWER DRIVE Molex 87831-5920 J9 ADB TE 5749181-1 J10 ADB TE 5749181-1 J11 Speaker J12 MAIN Molex 39-28-1143 J13 PDS TE 5535032-4 J14 SIMM PE Connectors HWS9229 J15 SIMM PE Connectors HWS9229 J16 1x3 HEADER L1 33uH L2 33uH L3 33uH L4 Ferrite Bead Q1 2N3904 R1 10k R2 10 R3 47 R4 47 R5 560k R6 10 R7 10 R8 1.2k R9 47 R10 47 R11 1k R12 150 R13 1k R14 470 R15 1k R16 3.3k R17 10k R18 1k R19 10 R20 75 R21 3.3k R22 47 R23 47 R24 47 R25 560 R26 3.3k R27 3.3k R28 47 R29 47 R30 47 R31 10k R32A 47 R33A 47 R34 10k R35 150 R36 150 R37 39 R38 39 R39A 47 R40A 47 R41 3.3k R42 39 R43 3.3k R44 3.3k R45 3.3k R46 3.3k R47 3.3k R48 3.3k RP1 39 Bourns 4610X-102-390LF RP2 39 Bourns 4610X-102-390LF U1C SND U2B FILTER Bourns 4120R-601-250/201 U2C 26LS30 U2E 74ACT257 U2F 74ACT257 U3C 26LS32 U4B FILTER Bourns 4120R-601-250/201 U4C 26LS32 U4D MC3488A U4E BBU U5D 85C30 SCC U6B 58C30 SCSI U6D ROM HIGH U7D ROM LOW U7E MC68000 U8B FILTER U8D SWIM U9D GLU U10C ADB U10D 16 Mhz Clock U11A ADB FILTER HALO LD11-0246FLF (24uH Common Mode 1:1:1:1 Choke) U11B FILTER Bourns 4120R-601-250/201 U11C RTC U11D Rockwell 338-6523 TPI U11F 74FCT245 U12F 74FCT245 Y1 32.768 KHz Quote Link to post Share on other sites
cheesestraws Posted November 7 Report Share Posted November 7 Thanks! Quote Link to post Share on other sites
Kai Robinson Posted November 7 Author Report Share Posted November 7 BTW - a reminder that U11D is just a standard 6522 VIA, the rockwell part number is misleading. Quote Link to post Share on other sites
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