The regions of a 1 MB (Mega Byte) Memory are shown in the diagram below. Each memory register is 1B (Byte). The memory regions are as follows: 256 KB RESERVED, 512KB RAM, 128KB SCREEN, and 1B KEYBOARD. Their arrangement is shown in the diagram below. 0 RESERVED RAM SCREEN KEYBOARD UNUSED 256 KB 512 KB 128 KB 1 B
The regions of a 1 MB (Mega Byte) Memory are shown in the diagram below. Each memory register is 1B (Byte). The memory regions are as follows: 256 KB RESERVED, 512KB RAM, 128KB SCREEN, and 1B KEYBOARD. Their arrangement is shown in the diagram below. 0 RESERVED RAM SCREEN KEYBOARD UNUSED 256 KB 512 KB 128 KB 1 B
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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Transcribed Image Text:The regions of a 1 MB (Mega Byte) Memory are shown in the diagram below.
Each memory register is 1B (Byte).
The memory regions are as follows: 256 KB RESERVED, 512KB RAM, 128KB SCREEN, and 1B
KEYBOARD. Their arrangement is shown in the diagram below.
0
22⁰-1
RESERVED
RAM
SCREEN
KEYBOARD
UNUSED
256 KB
512 KB
128 KB
1 B
Fill in the blanks to submit your answer to the following questions:
(a) The lowest memory address associated with the 512KB RAM is
complete 20-bit address in HEXADECIMAL notation without spaces. Note: For example, the lowest
memory address associated with the RESERVED region is 0x00000 in HEXADECIMAL notation.
(b) The highest memory address associated with the 512KB RAM is
complete 20-bit address in HEXADECIMAL notation without spaces.
Write the
. Write the
(c) The memory-mapped IO address of the 1B Keyboard register is
complete 20-bit address in HEXADECIMAL notation without spaces.
(d) Say we utilize a DMUX8Way to route the load signal to the various regions of the memory in
order to perform a data write. What would be the binary values of the DMUX8Way select bits
needed in order to perform data write to SCREEN?
. Note: For example, if the
select bits 2:0 were 011 then you'd write Ob011 or 011
. Write the
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