
HP Vectra VE 5/xx Series 2 PC
Medium-Profile
Desktop Vectras HP Vectra VE 5/xx Series 2 PC 21-5
21
IRQs and I/O Addresses
Cache Memory
The PC has a socket for the installation of an optional level-two cache memory
module. This module provides 256 KB cache.
Video Memory
The PC is supplied with 1 MB of video memory for 1024 × 768 in 256 colors. An
additional 1 MB of video memory can be installed by adding a pair of 512 KB
modules in surface mount technology sockets. This will make a total of 2 MB for
1024 × 768 in 64 K colors. You will need the PLLC Extraction Tool (part number
5041-2553) to remove the video upgrade chips from their sockets.
Main Memory
The PC uses 32-bit 60ns EDO main memory modules. Memory modules must be
installed in pairs of identical modules. Use only 4 MB and 16 MB modules in
bank C.
The PC is supplied with 8 MB or 16 MB of main memory (2 × 4 MB or 2 × 8 MB
memory modules installed in bank A). The maximum memory supported is
128 MB.
IRQ Function I/O Port Hexadecimal
IRQ 3 Free if not used for serial port 2E8h-2EFh, 2F8h-2FFh
IRQ 4 Free if not used for serial port 3F8h-3FFh, 3E8h-3EFh
IRQ 5 Free if not used for parallel port 278h-27Fh, 378h-37Fh
IRQ 6 Integrated flexible disk drive controller 3F0h-3F5h, 3F7h
IRQ 7 Free if not used for parallel port 278h-27Fh, 378h-37Fh
IRQ 9 Available for PCI devices, if not used by ISA board –
IRQ 10 Available for PCI devices, if not used by ISA board –
IRQ 11 Available for PCI devices, if not used by ISA board –
IRQ 14 Integrated IDE controller primary channel 1F0h-1F7h, 3F6h
IRQ 15 Free if not used by secondary IDE channel
(CD-ROM)
170h-177h, 376h
–Integrated I/O controller 370h-371h
–Integrated video controller 3B0h-3DFh
–HP Reserved 496h-497h
psh-v1.bk : ve5-s2 Page 5 Tuesday, March 11, 1997 1:16 PM