I;m sorry I didn't noticed that you already had answered to my question
Here i s my Belarc report,and to answer your question about the audio plugs there are not in the I/O Plate but in this lower section...
Operating System System Model
Windows XP Professional Dodatek Service Pack 2 (build 2600) No details available
Processor a Main Circuit Board b
800 megahertz Intel Pentium III
32 kilobyte primary memory cache
256 kilobyte secondary memory cache Board: ASUSTeK Computer INC. CUSL2 REV 1.xx
Bus Clock: 133 megahertz
BIOS: Award Software, Inc. ASUS CUSL2 ACPI BIOS Revision 1003 10/04/2000
Drives Memory Modules c,d
80,02 Gigabytes Usable Hard Drive Capacity
64,21 Gigabytes Hard Drive Free Space
LG DVD-ROM DRD8120B [CD-ROM drive]
LITE-ON CD-RW SOHR-5238S [CD-ROM drive]
Stacja dyskietek [Floppy drive]
WDC WD800JB-00JJC0 [Hard drive] (80,02 GB) -- drive 0 512 Megabytes Installed Memory
Slot 'DIMM 1' has 128 MB
Slot 'DIMM 2' has 128 MB
Slot 'DIMM 3' has 256 MB
Local Drive Volumes
c: (NTFS on drive 0) 80,02 GB 64,21 GB free
Controllers Display
Standardowy kontroler stacji dyskietek [Controller]
Kontroler Intel(R) 82801BA Ultra ATA Storage Controller - 244B
Podstawowy kanał IDE [Controller]
Pomocniczy kanał IDE [Controller] NVIDIA GeForce4 MX 420 [Display adapter]
Monitor domyślny
Samsung S/M 755DF [Monitor] (15,7"vis, s/n HJFT912416, wrzesień 2002)
Bus Adapters Multimedia
Uniwersalny kontroler hosta USB Intel(r) 82801BA/BAM - 2442
Uniwersalny kontroler hosta USB Intel(r) 82801BA/BAM - 2444 None detected
Communications Other Devices
Karta Realtek RTL8139 Family PCI Fast Ethernet NIC #4