1. How fast conversion between hexadecimal, byte-addressable memory completed?
Highest address bit byte code :( - lowest address bits +) / on-chip memory capacity
Case: byte-addressable memory. If the memory chips to address 32Kx8bit AOOOOH DFFFFH from memory, it needs at least () with a storage capacity of core tablets.
Analysis: the premise is byte-addressable
Chip capacity is 32K * 8 bits 8 bits = 1 byte capacity is 32K bytes so the chip
is 32 * 1024 bytes = 32768 bytes
DFFFFH-A0000H = 3FFFFH = 262143 ( 10 decimal)
262,143 divided by 7.99 = 32768 is selected from 8
// hexadecimal 16 into every is 1, but we only the ten digits 0 ~ 9 this, we use A, B, C, D, E, F , respectively, five letters to represent 10, 11, , 14, 15. The letters are not case sensitive.
Hex bit 0 of the 0 th weight value of 16, a first power weight value of 1 to 16, the two weights is a power of 2 ...... 16
Therefore, in the N (N starting from 0 ) the position, if is the number of X (X is greater than or equal to 0, and X is 15 or less, namely: F) is represented by the size of the N-th power of X * 16.
Note Unit Conversion: 1byte = 8bit 1MB = 1024KB
2. how the missed test questions do remember the simplicity of knowledge?
The specific knowledge points down, repeatedly remember knowledge, especially to the kinds of questions often test