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Specifications 6-21
Table 6-4
Continued
I/O Address (Hex) System Function (Shipping Configuration)
170 - 177 Hard Drive Secondary Registers
178 - 1EF Unused
1F0 - 1F7 Hard Drive Primary Registers
1F8 - 1FF Unused
200 - 21F Unused
220 - 22F ESS Audio Registers (1st Possible) (Default)
230 - 23F ESS Audio Registers (2nd Possible)
240 - 24F ESS Audio Registers (3rd Possible)
250 - 25F ESS Audio Registers (4th Possible)
260 - 277 Unused
278 - 27A LPT2 and High Speed Parallel Port Registers
27B - 27F LPT2 High Speed Printer Port Registers
280 - 2F7 Unused
2F8 - 2FF Serial Control Register COM2
300 - 36F Unused
370 - 371 Reserved
372 Diskette Digital Output Register
373 Unused
374 Reserved
375 Diskette Main Status/Data Registers
376 Reserved
377 Diskette Input/Control Registers
378 - 37A LPT1 and High Speed Parallel Port Registers
37B - 37F Unused
380 - 387 Unused
388 - 38B ESS FM Synthesizer
38C - 3AF Unused
3B0 - 3BB Cirrus Logic Video Controller
3BC - 3BE LPT3 and High Speed Parallel Port Registers
3BF LPT1 High Speed Parallel Port Registers
3C0 - 3CD Cirrus Logic Video Controller
3D0 - 3DF Cirrus Logic Video Controller
3F0 - 3F7 Diskette Drive Controller Primary Registers
3F8 - 3FF COM1 Serial Controller Registers
400 - 4CF Unused
480 - 48F Extended DMS Registers
4D0 - CF6 Unused
CF7 Configuration/NVM Data Register
CF8 - CFB PCI Configuration Index Register
CFC - CFF PCI Configuration Index Register
D00 - FFF Unused