20 MHz Motherboard
Apple 661-1615. 820-0301, 630-0265 on board. Logic board for the Macintosh IIsi. ROM chips are either soldered on or SIMM based. Currently have one of each available (pictured is one without soldered ROM).
Non working board, caps are leaking.
A) SIMM based ROM (not included)
B) Soldered ROM
These can be great DYI projects or there are people that provide recapping service such as Mac Caps.
Available AS IS, no warranty.