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TS9000/TS9050 TouchStar Systems User Manual
SYSTEM REFERENCE
CPU
The TouchStar main circuit board assembly contains the central
processing unit (CPU), DRAM, and an optional Flash-ROM
configured as a DOS device. The TouchStar is configured with
an AMD 5X86 processor. This CPU is driven by a 33MHz clock
signal from the main timer circuits. It runs internally at
133MHz.
System Cache
The TouchStar is configured with a 16 KB Level 1 processor
cache memory. Optional configurations include 128 KB or 256
KB Level 2 processor cache memory.
TouchStar System BIOS
The TouchStar System BIOS is an industry-standard basic
input/output system configured to support all onboard input/
output (I/O) functions. It incorporates an advanced system set-
up utility, as well as an extensive series of internal diagnostics
for system test and verification.
The standard BIOS is contained in a single 128Kbyte Flash
device and uses non-volatile CMOS RAM to store the real-time
clock, system configuration, and system diagnostic information.
The Flash device supports in-circuit reprogramming for BIOS
updates, adding features, or reconfiguring certain system
parameters.
The BIOS has been initialized to facilitate all communications
between the operating system, CPU and peripheral devices. The
TouchStar BIOS includes the main System BIOS, the Video
BIOS, and the system Set-Up Utility. Additional device drivers
can also be added.
The System BIOS consists of a routine designed to test the sys–
tem hardware, bootstrap load the operating system and boot-
strap load the device drivers. The 64Kbyte System BIOS module
resides in memory address spaces 0C,0000
H
to 0C,FFFF
H
.
APPENDIX____________________________________
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