Kai Robinson Posted January 7 Report Share Posted January 7 I've had a bit of luck in sourcing old Apple Custom IC's using utsource.net - I thought i'd ordered some BBU's...turns out instead of ordering 344S0603-B's, i ordered 344S0063-A's, which is the SE/30's ASC chip... And they arrived, well packed, with a proper invoice, in PLCC packaging, they're not remarked, they're definitely NOS chips - proper ejection markings, too. I've searched UTSource some more and they have in stock: 344-0042-B - SE & SE/30 RTC Chip -- NEW 344-0062-A - SE SWIM Chip -- Reclaimed 343-0045-A - SE & SE/30 SND Chip -- Reclaimed All for reasonable prices. I'm taking a punt on about a dozen of each - for testing purposes, but could be a handy avenue for the Mac <insert model here> Reloaded projects So, if anyone wants an ASC chip - let me know Quote Link to post Share on other sites
maceffects Posted January 7 Report Share Posted January 7 Here is a useful site for ASIC info including part numbers to search http://www.applelogic.org/APPLEASICs.html Quote Link to post Share on other sites
Kai Robinson Posted January 7 Author Report Share Posted January 7 I know all about that site - used it for cross referencing a few times - but it's geared towards the Apple II, rather than the Mac's. Quote Link to post Share on other sites
maceffects Posted January 7 Report Share Posted January 7 Seems like we should work on a Mac version then Quote Link to post Share on other sites
Kai Robinson Posted January 8 Author Report Share Posted January 8 I have begun this process https://docs.google.com/spreadsheets/d/1NDIA5orTwraRmOUgzrKxWYXcf2AXdULkdwUm020HdXI/edit?usp=sharing Quote Link to post Share on other sites
demik Posted January 8 Report Share Posted January 8 19 hours ago, Kai Robinson said: I know all about that site - used it for cross referencing a few times - but it's geared towards the Apple II, rather than the Mac's. A somewhat more complete version is available here : http://mess.redump.net/mess/driver_info/mac_technical_notes?s[]=mac&s[]=technical Quote Link to post Share on other sites
Kai Robinson Posted January 8 Author Report Share Posted January 8 OK - we're two models in, and i've even made pinouts...in spreadsheet form Quote Link to post Share on other sites
cheesestraws Posted January 8 Report Share Posted January 8 11 hours ago, Kai Robinson said: I have begun this process Whatever font you're using here makes capital As look like uppercase lambdas (Λ) and it's weirdly throwing me off Quote Link to post Share on other sites
Kai Robinson Posted January 8 Author Report Share Posted January 8 Aaah - i'll switch to Roboto Mono - i was using inconsolata - my default terminal font Quote Link to post Share on other sites
cheesestraws Posted January 8 Report Share Posted January 8 Wasn't a complaint, more just an amused note; my eye read HA in HAL as ΗΛ (ηλ) and it was weirdly disconcerting to find a latin L after it. This suggests two things: firstly, I need to get better at compartmentalising alphabets in my head, and secondly I need to take the Greek electricity (ηλεκτρικός, beginning, you will note, with those two letters) company leaflet off my fridge (long story) because it's obviously starting to warp my mind... Thread hijack over, apologies. Quote Link to post Share on other sites
LaPorta Posted January 8 Report Share Posted January 8 I wonder iif they have EGRETs... Quote Link to post Share on other sites
Kai Robinson Posted January 8 Author Report Share Posted January 8 @LaPorta I just searched - nothing on there by default, but i can try and get an RFQ Quote Link to post Share on other sites
quorten Posted January 8 Report Share Posted January 8 Interesting, I have to say I was somewhat surprised at first to hear that New-Old-Stock apple custom ICs are actually a thing. But I'm guessing it makes sense if you think a bit deeper... Apple may have been planning on making extras on the assumption that their techs might do precise, minimal component repairs (didn't really turn out that way in the field), so that's one thing. And then in their financial troubles in the '90's, maybe they closed a (secretive) deal to sell off their inventory of obsolete components to a Chinese no-name. Well, that's my guesses on how NOS ended up on UTsource. Might be worth asking about chain of custody of these components and see how reluctant they are to answer. Quote Link to post Share on other sites
Kai Robinson Posted January 11 Author Report Share Posted January 11 (edited) ADB XCVR available! These work in: Classic, II, IIx, IIcx, IIci, SE/30 & Quadra 700 Edited January 11 by Kai Robinson Quote Link to post Share on other sites
Kai Robinson Posted Saturday at 12:24 PM Author Report Share Posted Saturday at 12:24 PM Latest acquisitions! GENUINE NoS 3430045A's (Sony SND Chip) GENUINE NoS 3440042B's (RTC Chip for SE & SE/30's) Refurbished, used 344-0062A's (SWIM Chip, Harris branded with 1990 Date Codes) - These look to be genuine, just the tops have been skimmed and re-printed - not a cheap job, these won't rub off with alcohol. So if anyone needs one - ping me a DM, Quote Link to post Share on other sites
CC_333 Posted Saturday at 05:21 PM Report Share Posted Saturday at 05:21 PM Can these be reverse engineered and re-implemented somehow? I ask because, since the newfound supply of these is finite and will likely run out sooner than later, this seems like it would be an excellent opportunity to reverse engineer them without sacrificing working logic boards. c Quote Link to post Share on other sites
Kai Robinson Posted Saturday at 05:50 PM Author Report Share Posted Saturday at 05:50 PM I'm happy to give up a handful of SWIMs to anyone that wants to reverse engineer them Quote Link to post Share on other sites
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