AOpen AP41 User Manual page 30

Hardware Setup
AMD DX4 CPUS
The 3.45V AMD DX4 processors come in three types: AMD DX4
(V8T), AMD DX4-S(SV8T) and AMD DX4-S(SV8B). The AMD DX4
(V8T) is a non SL-enhanced CPU that supports write-through internal
cache mode. The AMD DX4-S(SV8T) is an SL-enhanced CPU that
supports write-through internal mode. The AMD DX4-S(SV8B) is also
an SL-enhanced CPU but with write-back internal cache mode
support.
To determine your AMD CPU type, check the second row of your
CPU label. An SL-enhanced AMD DX4 CPU has a letter "S" following
the "AMD DX4-100" label. The last letter (i.e., either "B" or "T")
indicates the CPU cache mode supported. See the following figure.
AMD 486DX4 (V8T) AMD 486DX4-S AMD 486DX4-S
(w/out SMM support) (SV8T) (SV8B)
"T" indicates write-through "S": SL-enhanced "S": SL-enhanced
mode "T" indicates "B" indicates
write-through mode write-back mode
2-10 User's Guide