Register Name        Addr                   Bits     Description
Vendor_ID            0 (0x0)                15:0     3Dfx Interactive Vendor Identification
Device_ID            2 (0x2)                15:0     Device Identification
Command              4 (0x4)                15:0     PCI bus configuration
Status               6 (0x6)                15:0     PCI device status
Revision_ID          8 (0x8)                7:0      Revision Identification
Class_code           9 (0x9)                23:0     Generic functional description of PCI device
Cache_line_size      12 (0xc)               7:0      Bus Master Cache Line Size
Latency_timer        13 (0xd)               7:0      Bus Master Latency Timer
Header_type          14 (0xe)               7:0      PCI Header Type
BIST                 15 (0xf)               7:0      Build In Self-Test Configuration
memBaseAddr          16 (0x10)              31:0     Memory Base Address
Reserved             20-59 (0x14-0x3b)      n/a      Reserved
Interrupt_line       60 (0x3c)              7:0      Interrupt Mapping
Interrupt_pin        61 (0x3d)              7:0      External Interrupt Connections
Min_gnt              62 (0x3e)              7:0      Bus Master Minimum Grant Time
Max_lat              63 (0x3f)              7:0      Bus Master Maximum Latency Time
initEnable           64 (0x40)              31:0     Allow writes to hardware initialization registers
busSnoop0            68 (0x44)              31:0     Chuck bus snooping address 1 (write only)
busSnoop1            72 (0x48)              31:0     Chuck bus snooping address 0 (write only)
cfgStatus            76 (0x4c)              31:0     Aliased memory-mapped status register
cfgScratch           80 (0x50)              31:0     Scratchpad register
siProcess            84 (0x54)              31:0     Silicon Process monitor register
Reserved             88-255 (0x58-0xff)     n/a      Reserved