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Macintosh SE Superdrive (1.44) ROM flash service
Posted by: lem150 on 2026-01-19 17:02:21
Hi I am looking for someone to create the three ROM chips (hi, low, swim) so that my Macintosh SE can use a 1.44 superdrive floppy. I can pay for the chips or buy them, although I have no idea where to get them from?
Posted by: cheesestraws on 2026-01-19 17:03:00
The SWIM isn't a ROM chip, it's an integrated logic chip, so I'm afraid you're stuck looking for an original of that one.
Posted by: lem150 on 2026-01-19 17:04:37
The SWIM isn't a ROM chip, it's an integrated logic chip, so I'm afraid you're stuck looking for an original of that one.
I see! I thought you could flash them with a flash tool?
Posted by: cheesestraws on 2026-01-19 17:05:16
I see! I thought you could flash them with a flash tool?

The ROMs you can, but the SWIM isn't a ROM.
Posted by: lem150 on 2026-01-19 17:06:48
Google AI has failed me again! Do you have one to sell me?!
Posted by: luRaichu on 2026-01-19 18:10:54
"AI" doesn't care about Facts.
Posted by: obsolete on 2026-01-19 18:11:52
You can get a SWIM that will work in your SE from Kero's Mac Mods in Japan for $48: https://en.infinityproducts.co.jp/product-page/super-wh-iwm-swapper-plcc44-to-dip28-swim-adapter

For an extra $16, you can also get flashed ROMs, but they're not pin-compatible, so there's a little extra work required to install them.
Posted by: mattsoft on 2026-01-19 18:25:07
It's probably better/cheaper/easier just to find an FDHD SE logic board.
Posted by: lem150 on 2026-01-19 18:35:02
Yup working on that now lol 🙂
Posted by: luRaichu on 2026-01-19 19:02:30
For reference, here's a picture of an SE FDHD logic board (from oldcrap.org)

When searching for an FDHD logic board be sure the SWIM/IWM chip matches up with this photo
Posted by: mari3311 on 2026-01-24 08:34:04
You can buy it here from Japan.
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