The images here show that the 5ALI61 chipset chips are the ALi M1542 Aladdin-V Socket 7 North Bridge, and the ALi M1543 South Bridge:
https://theretroweb.com/motherboards/s/ford-lian-agp-ali
Logically, the M1542 appears as an M1541 CPU-to-PCI bridge and an M5243 AGP controller.
https://bitsavers.org/components/ali/M1541_M1542_Aladdin_V_Socket_7_North_Bridge.pdf
Logically, the M1543 appears as an M1533 PCI to ISA Bridge, an M5229 PCI IDE Controller, and an M5237 two port OpenHCI USB host controller.
https://bitsavers.org/components/ali/M1543_Desktop_South_Bridge_199801.pdf
There is a bit in an M1533 PCI to ISA Bridge device PCI configuration space register which enables or disables the USB host controller (Register Index : 53h-52h, Bit 14, On-chip USB device enable/disable).
As the previous reply states, check through all of the BIOS setup screens to see if there is an option to enable the USB host controller built into the chipset.