Early Mac schematic

[H3NRY]

I posted MacDraw schematics from reverse engineering my Mac back in 1984. You'll need MacDraw to open them. Anybody know of an OS X app that can open or translate MacDraw docs?

http://homepage.mac.com/henryspragens/FileSharing4.html

->68K Mac -> MacSchematic

 

[Mac128]

I don't know of a direct OS X translator, but they can be easily opened in Mini vMac using Mac Draw, then print to a postscript file using the LaserWriter driver v7.0, which Preview will open.

As always Henry you are a treasure to this site, thank you so much for your continued contributions!

 

[H3NRY]

I thought of posting PDF versions, but I figured you'd rather have the original. Odd that Apple didn't carry the "MacDraw pict" format into AppleWorks like they did "MacPaint pict". The Draw module in AW is obviously a descendant of MacDraw, which is why I like it so well. For the simple technical drawings I do, there's no handier tool, and I'm sorry to see it go. Also odd that QuickTime and Graphic Converter don't handle the format since it's basically vanilla QuickDraw code.

 

[Trash80toHP_Mini]

I'll have a go at converting it with my sign software, CAD packages and my illustration apps, have you tried to open/import it into AI, FreeHand or CorelDraw? Those are all good bets to get your pict files transferred as object oriented data in EPS or PDF files.

It's not all that surprising that "image" editing software doesn't handle object oriented artwork. that's what illustration & CAD packages are meant to do, GraphicConverter is for pixels, not paths. [] ]'>

 

[JDW]

HENRY, bless you for making this available!

I created a PDF. I started by copying the files from my OS 10.6 iMac to my OS 9 G4 Cube. I then used FileBuddy to add back the file type & creator (DRWG & MDRW). I then used MacDraw Pro under OS 9 to convert the MacDraw files to MacDraw Pro format (you can find this in a not so secret "garden" -- hint hint). I then pulled them over to my OS 10.6 iMac and opened them in Intaglio 3. From there I generated individual PDFs and then used CombinePDFs to put them all in a single file. PDF download is here.

If HENRY wishes to nab this PDF and post it on his server, that is fine by me, since the files are his in the first place.

 

[Trash80toHP_Mini]

THX: to H3NRY & JDW! :approve:

 

[Mac128]

THX: to H3NRY & JDW! :approve:

Yes thanks! But it would still be interesting to find a way to open them directly under OS X. I found a shareware application called EasyDraw which is supposed to open MacDraw files. It recognized them as such and opened them, but they were basically empty documents. So not sure exactly what the problem is. Is it because they were missing the resource forks JDW?

 

[JDW]

Mac128, I just downloaded the EasyDraw Demo. I tried it on HENRY's original MacDraw formatted files and the MacDraw Pro formatted versions that I created. In both cases, I got the silly "Limited Conversion" error that says only the first "35 graphics will be imported." This is truly misleading the user because in my mind "35 graphics = 35 graphic documents." In fact, it appears to me, "35 objects within any given file."

I could see a few bits and pieces of the schematics appear on my screen but there is no way to know what will happen unless you have a code. If you have a code then I would not expect the entire document to be blank since I myself could see bits and pieces of the document in spite of the 35 object limit.

But in light of the excessively restrictive demo (give me the ability to preview at least one document in its entirety for crying out loud), I must give EasyDraw two thumbs down.

Moreover, even Intaglio is not needed if you don't need to make a PDF or if you can find a way to generate a PDF from MacDraw Pro (either in Classic or in OS 9). I tried selecting the Adobe printer in the Chooser on my OS 9 G4 Cube and then printing from MacDraw Pro, but it crashed when I did that. Even if you add back the file type and creator for HENRY's files and then try to open them directly in Intaglio, you will get a -23 error. They only open in Intaglio after you convert them to MacDraw Pro format. But like I said, MacDraw Pro is available in a particular "garden" so there is no real excuse not to use it. But hey, we are all on a 68k Mac forum here, so no doubt we all have the means to use the original MacDraw on our 68k Macs to access the files directly (albeit after adding back the file type and creator -- which is a job I wish we didn't have to do).

 

[Mac128]

Ah ... 35 objects, eh? I suppose that's possible except, I opened one file which only displayed 3 objects, so not sure. There are conversion reports which revealed "No resource for drawing information found., No resource for ruler information found.", so perhaps that was the problem. But I was not particularly impressed with the application either ...

if you don't need to make a PDF or if you can find a way to generate a PDF from MacDraw Pro (either in Classic or in OS 9).

I would presume you make a PDF the same way you make one on any Classic Mac, i.e. use the LaserWriter 7.0 or above driver and print a postscript file. That opens in Preview which you can then save as a PDF. While your method is more, uh, "authentic", I prefer the fewer steps of using Mini vMac and importing the files and exporting the postscript file for use with Preview.

 

[JDW]

Mac128, yes I "assume" it will work as you describe when creating a PDF via Classic. I did not try that, instead booting my G4 directly into OS 9 and running MacDraw Pro from there. In that case, I was unable to generate a PDF from MacDraw Pro due to a crash. But perhaps someone else could test this scenario to see if the crash is specific to my OS 9 G4 Cube? (I've not reinstalled OS 9 on that machine in 4 years.)

I have not yet setup Mini vMac to test but I am sure that would work as well. I did try to install SheepShaver after I purchased a new iMac i7. Sadly, my attempt to get it setup right was a complete and utter failure.

Anyway, Kudos to HENRY for these files. May we see many more 68k gems emerge from your treasure-filled cabinet of files!

 

[H3NRY]

JDW, thanks for your work. I usually make PDFs by printing to a file, which works on my 68K Macs without crashing. Then Preview makes PDFs after transferring to an OS X Mac. Sorry about the missing file types. Apparently Snow Leopard mangled the files in the upload process, though I checked them by re-downloading to my Cube under OS 9 and opening the files with MacDraw II.

I found the manilla file with the I.M. Underground docs. I'll post them as I have time to scan and clean them up. I think they originally were on a floppy, so I'll look for that, too.

 

[Mac128]

booting my G4 directly into OS 9 and running MacDraw Pro from there. In that case, I was unable to generate a PDF from MacDraw Pro due to a crash.

You said you used an Adobe driver. Use the generic Apple LaserWriter to print a postscript file, as Henry describes. There is no reason your G4 running OS 9 should not be able to create a postscript file from anything. If your Cube crashes from that then you have a problem somewhere.

 

[JDW]

Mac128, I know I have a problem somewhere. Even when I connect to my G4 Cube (booted into OS 9) via my iMac i7 (using Go > Connect to server > afp://192.168.24.52) it connects but then why I try to transfer a lot of files sometimes the Cube freezes and other times it just coughs up an error. This could be a Snow Leopard incompatibility I suppose. But I need to reinstall OS 9 on the Cube to start clean to know for sure.

 

[HarrisonIII]

Hi everyone, I'm new to these forums but have been a collector for awhile (roughly mid 1994), and have been following these posts for several years, and I have have to say they have been a great help the last 14 months as my Macs have started dying in sequence, first the 128k, then the 512k, then the plus (how weird is that?), here is the kicker, the next one to kick the bucket was my IIcx. I want to ask about the legality of posting schematics I have made from disassembling my boards and rebuilding them? Henry, thanks for the schematics again, great help! but I might be opening the wrong files? They seem to be schis for the 512k? They were a great help for my 512, but does anyone have 128k schematics, I'd like to make triple sure what I'm doing before I take an iron to my boards. I really would like to have pics or schis of the later 128k "thin Mac board" I Know they are almost the exact same (128k and 512k), but again ??????? By the way, I have an extra analog board from a plus, if anyone wants, it let me know, all you have to do is pay shipping, I have way to many of them and My wife is beating me up to make more room, so if I can point to a trip to the post office and get one sent away she will probably be happy that I'm making an effort

 

[H3NRY]

There are notes on the digital schematic of which parts are not present on the 128K board. The two boards are alike except the RAM array on the 512 obviously has 256K chips instead of 64K, and there is an extra address demultiplexer. If you have a Mac later than about the 30th week of '84, it is the same PC board as a 512. The schematic should help you with either. My experience is that digital boards rarely fail, and a classic Mac that doesn't boot nearly always has analog problems. In particular, 5V being low is common, since it isn't regulated. Cracked solder joints on parts that run hot are VERY common. There are several revisions of the analog board, so yours may be slightly different than mine.

 

[Mac128]

My experience is that digital boards rarely fail, and a classic Mac that doesn't boot nearly always has analog problems.

All of the dead 128k digital boards in my possession all have various degrees of the same problem: Bit Rot. Particularly the Apple branded RAM chips. There are usually two or more chips which have failed. I have never seen any other failures.

However, I would point out that there are several new resistors on the 512K aside from the mux array which will not match up to the 128k schematic. A search will reveal an extensive discussion about these differences.