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Macintosh-Classic-Reloaded
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@ -19,37 +19,37 @@ While it is possible to source some of the Apple custom IC's from resellers and
These boards aren't quite enough to build a new Macintosh SE from scratch (maybe one day, though!) - so you'll need to harvest a few parts from your donor board.
* **RAM Expansion Socket - 2 row, 44-pin connector - may be possible to substitute an IDC header.
* **RAM Expansion Socket** - 2 row, 44-pin connector - may be possible to substitute an IDC header.
* **DB19 Connector - Almost NLA, only really available as NoS or Reclaimed. These are a bastard to get out cause the lugs are soldered. I found that pre-heating the joint first, filled with flux, then pressing hard into the pad with the desoldering gun, waiting til you see the solder go molten, you can often schlorp out the majority of the solder and then tidy up with wick afterwards.
* **DB19 Connector** - Almost NLA, only really available as NoS or Reclaimed. These are a bastard to get out cause the lugs are soldered. I found that pre-heating the joint first, filled with flux, then pressing hard into the pad with the desoldering gun, waiting til you see the solder go molten, you can often schlorp out the majority of the solder and then tidy up with wick afterwards.
NoS ones available from https://www.exxoshost.co.uk/atari/store2/ - search for DB19F ASCI PCB RA POST
* **Main 14-pin Molex - Molex P/N 39-28-1143 - Still available new - costs less than £2. Get a new one.
* **Main 14-pin Molex** - Molex P/N 39-28-1143 - Still available new - costs less than £2. Get a new one.
* **Inductors & Ferrite beads
* **Inductors & Ferrite beads**
* **Passives - REPLACE ALL - use high tolerance metal film resistors & Nichicon or Panasonic electrolytics.
* **Passives** - REPLACE ALL - use high tolerance metal film resistors & Nichicon or Panasonic electrolytics.
* **AM26LS30's - NLA, only available as NoS or Reclaimed
* **AM26LS30's** - NLA, only available as NoS or Reclaimed
* **AM26LS32's - Available new, but still worth reclaiming
* **AM26LS32's** - Available new, but still worth reclaiming
* **MC3488A - NLA - replace with Texas Instruments SN75150
* **MC3488A** - NLA - replace with Texas Instruments SN75150
* **Rockwell 338-6523 - This is the 65C22N VIA, still available new as the W65C22S6TPLG-14
* **Rockwell 338-6523** - This is the 65C22N VIA, still available new as the W65C22S6TPLG-14
* **RTC Chip - Custom Chip - maybe possible to clone using a flex-PCB/ATTiny Chip
* **RTC Chip** - Custom Chip - maybe possible to clone using a flex-PCB/ATTiny Chip
* **ADB Chip - Apple branded PIC16CR54 in a PLCC package - maybe possible to re-produce/clone
* **ADB Chip** - Apple branded PIC16CR54 in a PLCC package - maybe possible to re-produce/clone
* **BBU Chip - Custom Chip - identical in pinout to the Macintosh SE
* **BBU Chip** - Custom Chip - identical in pinout to the Macintosh SE
* **NCR5830/AM58C30 SCSI Chip - Reclaim, but if not possible, these can be purchased from Mouser, as ZiLOG still makes them under the part number Z53C8003VSG
* **NCR5830/AM58C30 SCSI Chip** - Reclaim, but if not possible, these can be purchased from Mouser, as ZiLOG still makes them under the part number Z53C8003VSG
* **SWIM Floppy Chip - Custom Chip - available NoS from UTSource
* **SWIM Floppy Chip** - Custom Chip - available NoS from UTSource
* **ROM Chip - Toshiba TC534200 MASK ROM - Reclaim & reuse, but these are the same pinout as 27C040
* **ROM Chip** - Toshiba TC534200 MASK ROM - Reclaim & reuse, but these are the same pinout as 27C040
![Finished Logic Board](/macclassicboard-final-rev12-release.jpg)
![Finished Logic Board - Bottom](/macclassicboard-final-rev12-release-rear.jpg)