FT5000 HANDBOOK 6/1
6
I/O ADDRESSES, INTERUPTS ETC.
System I/O addresses
The following table shows the location in I/O space of all directly I/O-accessible registers.
Address
Resource
Device
Notes
0000h - 000Fh
DMA Controller 1
PIIX4E
0010h - 001Fh
DMA Controller 1
PIIX4E
Aliased from 0000h - 000Fh
0020h - 0021h
Interrupt Controller 1
PIIX4E
0022h - 0023h
0024h - 0025h
Interrupt Controller 1
PIIX4E
Aliased from 0020h - 0021h
0026h - 0027h
0028h - 0029h
Interrupt Controller 1
PIIX4E
Aliased from 0020h - 0021h
002Ah - 002Bh
002Ch - 002Dh
Interrupt Controller 1
PIIX4E
Aliased from 0020h - 0021h
002Eh - 002Fh
Super I/O Index and Data Ports
0030h - 0031h
Interrupt Controller 1
PIIX4E
Aliased from 0020h - 0021h
0032h - 0033h
0034h - 0035h
Interrupt Controller 1
PIIX4E
Aliased from 0020h - 0021h
0036h - 0037h
0038h - 0039h
Interrupt Controller 1
PIIX4E
Aliased from 0020h - 0021h
003Ah - 003Bh
003Ch - 003Dh
Interrupt Controller 1
PIIX4E
Aliased from 0020h - 0021h
003Eh - 003Fh
0040h - 0043h
Programmable Timers
PIIX4E
0044h - 004Fh
0050h - 0053h
Programmable Timers
PIIX4E
Aliased from 0040h - 0043h
0054h - 005Fh
0060h, 0064h
Keyboard Controller
Keyboard chip select from 87307
0061h
NMI Status & Control Register
PIIX4E
0063h
NMI Status & Control Register
PIIX4E
Aliased
0065h
NMI Status & Control Register
PIIX4E
Aliased
0067h
NMI Status & Control Register
PIIX4E
Aliased
0070h
NMI Mask (bit 7) & RTC Address (bits 6::0)
PIIX4E
0072h
NMI Mask (bit 7) & RTC Address (bits 6::0)
PIIX4E
Aliased from 0070h
0074h
NMI Mask (bit 7) & RTC Address (bits 6::0)
PIIX4E
Aliased from 0070h
0076h
NMI Mask (bit 7) & RTC Address (bits 6::0)
PIIX4E
Aliased from 0070h
0071h
RTC Data
PIIX4E
0073h
RTC Data
PIIX4E
Aliased from 0071h