----- Original Message -----
> From: Gregg Eshelman <[email protected]>
>
> --- On Fri, 11/4/11, Jake Tesler <[email protected]> wrote:
>
>> How can I upgrade the floppy controller?
>
> Replace the IWM (Integrated Woz Machine) chip with a SWIM (Super Woz
> Integrated
> Machine) chip and replace the original ROM chips with the ones containing
> updated firmware for the SWIM chip.
>
> Good luck finding either.
>
> ROM and SWIM upgrades were also made for the Mac II to add 1.44M floppy drive
> support and also to correct a bug which limited the size of SIMMs usable in
> Bank
> A. I don't know if the SWIM chip for the SE and Mac II are the same. The
> ROMs are not.
>
The SE's IWM/SWIMÂ and the Mac II IWM/SWIM are not of the same physical size.
The SE is approx 1/2 x 1 3/8 inches. The Mac II is approx 1/2 inch square.
I just happen to have these two logic boards displayed in my living room as
"art" -- AFAIK they may still work. --glen
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