| Click here to select a new forum. |
| SWIM Chip Version |
Posted by: franklyn on 2026-05-08 01:26:26
I have a SWIM chip from a IIcx motherboard and an oxidized one from a PPC7100 motherboard. How many different versions are there? Are they interchangeable, or is the pinout—for example—different?
I’m asking because I would like to have a Macintosh II with an 020 CPU for upgrade purposes... |
Posted by: robin-fo on 2026-05-08 04:56:09
The one from the IIcx should work in the Mac II. The 7100 probably has a SWIM3 or NewAge or something.. |
Posted by: franklyn on 2026-05-08 10:34:28
... so there are
SWIM1 = 344SO061-A
SWIM2 = ?
SWIM3 = 343SO137-A |
Posted by: Arbee on 2026-06-01 11:24:55
https://wiki.mamedev.org/index.php?title=Driver:Mac_68K:Tech_Info:ASICs has basically everything anyone knows about Apple 34x numbers. But yes, 344S0061 is SWIM1 and 343S0137 is the somewhat rare discrete SWIM III (it's built into the system ASIC on almost everything that used it). |
| 1 |