W83C553F Datasheet, PDF (111/159 Pages) Winbond – SYSTEM I/O CONTROLLER WITH PCI ARBITER

W83C553F
Electrical Specifications
Port 92 Register (default = 24h)
Type:
Read/Write
Bit Description:
Bits [7:3]:
Bit 2:
Bit 1:
Bit 0:
Reserved. These bits default to "00100."
Read only. Value of pin 116 after reset. See page 25.
Alt A20.
Hot Reset. Changing this bit from a 0 to 1 will cause a system soft reset to occur. This bit must
be returned to 0 before another soft reset can be issued.
Co-processor Error Register
Type:
Write only
Bit Description:
Bits [7:0]:
Co-processor Error. This register only exists in x86 mode.
WINBOND SYSTEMS LABORATORY
108