Macintosh IIfx - SRAM compatibility

[Kai Robinson]

On the IIfx and the IIfx Reloaded, the two Peripheral Interface Chips use a 65C02 core running at 4MHz - they require SRAM to operate.

Here's a quick list of pin compatible 32K x 8 SRAM chips.

Manufacturer​	Part Number​
Lyontek	LY62256
Sony	CXK58257AP
Toshiba	TC55257BFL
NEC	uPD43256
OKI	MSM51257AL
Samsung	KM62256CLG-7
Hynix	GM76C256CLFW
Fujitsu	MB84256MB84256

 

[Bolle]

On a reloaded board you can just go for ISSI IS61C256AL in SOJ-28 which is still in production.
I made the pads for the SRAM large enough to take both, SOJ and the original wide SO footprint.