My OS doesn't have /proc mounted by default, but from dmesg ...

mainbus0 (root): SUNW,SPARCstation-5
cpu0 at mainbus0: MB86907 @ 170 MHz, on-chip FPU
cpu0: 16K instruction (32 b/l), 16K data (32 b/l), 512K external (32 b/l) DVMA coherent cache enabled

Yeah, it's old