Technical Information 1-13
Bridge Battery
The bridge battery saves the memory contents and system status for up to 5 minutes while
in Suspend mode. It is connected to the Audio board via connector P11. The AC adapter
maintains voltage in the bridge battery when the system is powered on or off. The bridge
battery stores 3.6 Volts, 70 mAH.
SYSTEM MEMORY
The CPU board provides 16 MB (3.3 V SO-DIMM) of standard RAM.
Optional SO-DIMMs with a value of 16-MB, 32-MB and 64 MB can be added to increase system
memory Versa 5060/5060X: Maximum 80-MB, Versa 5080/5080X: Maximum 144-MB.
In addition, 256-KB of read-only memory (ROM), 1 x 28F020, enables the system BIOS to be flashed.
The system provides 2 MB of video RAM (50-ns HyperPage mode, self-refresh).
The following Cache RAM is provided:
L1: 32 KB (Internal Pentium)
L2: 256 KB write back (External).
Memory Map
The system supports system and video shadowing, both controlled through complementary
metal oxide semiconductor (CMOS). The system supports BIOS as a cacheable area with
write protection. Table 1-2 lists the system's memory map.
Table
1-2
Memory
Map
Memory Space Size Function
0000000h-009FFFFh 640 KB DOS Applications & Optional Memory
Space Gap
00A0000h-00B7FFFh 96 KB Video (VGA) Graphics Memory
00B8000h-00BFFFFh 32 KB Text Mode Memory (SMM Space)
00C0000h-00C7FFFh 40 KB Video (VGA) BIOS
00C8000h-00D7FFFh 128 KB PCMCIA Window and USB (Extended
Memory or Upper Memory Block)
00D8000h-00DFFFFh 32 KB Boot Block Code CMOS Save Area
00E0000h-000FFFFFh 64 KB System BIOS ROM
To -00FFFFFFh 16 MB Total Base Memory
To -FFFEFFFFh 80 MB Total Expansion Memory
