William O Ferry <WOFerry+@CMU.EDU> writes:

IMHO, yes, no, in that order.  ;)

I suspect the chip you are looking at is "just supported" since, in
/sys/dev/ic/aic7xxxvar.h:

        AHC_AIC7770     = 0x010,
        AHC_AIC7850     = 0x020,
        AHC_AIC7860     = 0x021,        /* ULTRA version of the aic7850 */
        AHC_AIC7870     = 0x040,
        AHC_AIC7880     = 0x041,
        AHC_AIC78X0     = 0x060,        /* PCI Based Controller */

This is in -current at least, and in 1.2 beta as well.

> ASUS PCI-I486/SP3G motherboard, 486DX4/100, 16MB RAM, NCR 53C810 with
> Conner 1.06GB SCSI-II HD (64MB swap), S3 Trio64V+ (2MB PCI) video card.

IMHO, the memory and processor, in that order.

>     Would I do best to upgrade the processor (to a Pentium, 90-120 MHz)
> or the RAM (to 32, maybe 48MB)?

I have 64, but I'm lucky.  :)

--Michael