林阿发

VIA Software Engineer 笔试题  
题目内容
发信人: pentium (倚海凭栏), 信区: job
标 题: VIA Software Engineer 笔试题(ZZ)
发信站: 饮水思源 (2003年11月09日19:30:21 星期天), 转信

1. describe x86 PC's architecture in a diagram
cpu,core chipset, Cache,DRAM, IO-subsystem, IO-Bus

2. SWI instruction is often called a "supervisor call",describe the actions
in detail
a. Save the address of the instruction after the SWI in rl4_svc.
b. Save the CPSR in SPSR_svc.
c. Enter supervisor mode and disable IRQs.
d. Set the PC to 08 and begin executing the instruction there.

3.a. What is PIO operation? advantage and disadvantage?
b. DMA operation? advantage and disadvantage?
c. Scatter/Gather DMA engine? how does it operate?

4. MP3 decoder related.(a flow chart of decoding is presented)
a. advantages of Huffman encoding?
b. why the aliasing reduction is necessary?
c. analytical expression in mathematics of the IMDCT?
d. which block in the flow chart is suitable for the software implementation
and which for the hardware? reason?

5. Assembly codes -> C language (about 15 lines).

6. Graduation thesis description.
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