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

[Kai Robinson]

@Trash80toHP_Mini - here you go: https://drive.google.com/file/d/1qXWsemDG4Ypb7kUFZebFNU_NZiY-CQuv/view?usp=sharing

 

[Kai Robinson]

Porchy has worked some magic and behold - a .JED for the GLU!! A Proper fuse map!

Is anyone in a position to test this aside from me?

View attachment apple1.jed

 

[Bolle]

What type of PAL is this originally? Converting it to use a GAL or an ATF replacement would be useful I guess.

Edit: nevermind, fusemap already is for a 16V8 type device. I'll give it a try later on.

 

[cheesestraws]

Porchy has worked some magic and behold - a .JED for the GLU!! A Proper fuse map!

That was an impressively quick turnaround!

 

[Kai Robinson]

That was an impressively quick turnaround!

 I know! I'm unreasonably excited for this now

 

[Trash80toHP_Mini]

@Trash80toHP_Mini - here you go: https://drive.google.com/file/d/1qXWsemDG4Ypb7kUFZebFNU_NZiY-CQuv/view?usp=sharing

Nope, Guide to the Macintosh Family Hardware Second Edition is the book @quorten was referencing and it's available on vintageapple.org already. Got that one new off the shelf in the day, it's the 1990 update to the three part series. Technical Introduction to the Macintosh Family is the first book on the map and may suffice

Macintosh Family Hardware Reference has (more or different?) info for the SE and Mac II, that's assumed to be understood in GttMFH2e. So MFHR is the one to search for in .PDF out in the wilds. Unfortunately abebooks is sold out, but you might find a hard copy at a reasonable price somewhere else.

• ISBN-10 : 0201192551
  
• ISBN-13 : 978-0201192551
  
• Publisher : Addison-Wesley Pub. Co; 2nd edition (January 1, 1988)
  

edit: found one: used copy for $28.32

 

[Kai Robinson]

Only $254...

 

[Trash80toHP_Mini]

LOL! Gotta love the listed prices for new books And that only gets you the paperback version! Click on the 7 used from $25 link to get over the sticker shock. []

I'm wondering if the selling of "new" books on Amazon angle is a faster, safer path to laundered money than the usual eBay schtick?

 

[ronan]

Did you have a look here : https://www.abebooks.com/servlet/SearchResults?cm_sp=SearchF-_-topnav-_-Results&ds=20&kn=Macintosh Family Hardware Reference&sts=t ?   

 

[Crutch]

+1. AbeBooks (which is owned by Amazon!) is the place to get such things. Never Amazon proper. 

 

[Trash80toHP_Mini]

Definitely +1 for AbeBooks, looked there first yesterday and search reported the title was sold out. Didn't know Amazon owned them or I'd have been more hesitant to use them in the past. Finally got past my hatred of Amazon, now it's just skin-crawly when I buy from there.

This time a couple of Amazon prices are lower:

https://www.amazon.com/gp/offer-listing/0201192551/ref=tmm_pap_used_olp_0?ie=UTF8&condition=used

 

[Kai Robinson]

Okay, it's done... 

See pics for details! 

No boot, but a checkerboard again at least... 

 

[ronan]

Congrats on all the work done ! I'm really impressed ! Good luck for the future of this project  

 

[cheesestraws]

Well done!  I'm lagging significantly behind you, I fear... but most of mine is done too, so I will hopefully join you in checkerboard land shortly

 

[techknight]

Nice! 

that looks like uninitialized RAM, so the CPU isnt starting up for some reason. 

Wonder if theres another address/data line that was missed or unconnected. 

 

[Kai Robinson]

I just checked the test points for voltages - instead of reading +5v, it's reading +7.5v!!! 

I think my analog board has potentially killed some chips...

 

[quorten]

Oops, well... actually I'd vouch the essential chips are still working: GLU and BBU for one.  You can double check that the ROM and CPU are okay, and if so, that should actually be good enough for initial oscilloscope debugging.

 

[quorten]

Easy way to check the CPU is still working in some vein: If you can trigger *HALT + *RESET and it will respond by de-asserting/asserting *AS after a few clock cycles, it should be okay.

 

[Kai Robinson]

I'm thinking my analogue board is potentially in need of repair as well - seeing as the video is very off centre as well as being wonky...voltages are something i'll have to measure....if only i had an extension cable to be able to test this flat on a bench! Anyone make one at all?

 

[max1zzz]

Very nice!

As for extension cables, iirc you can get a normal 20pin ATX extension cable and just use one side of it (I haven't tried this personally though)