1. 6502 assembly language references data in memory locations using an operand value containing the address (without the # character that indicates an immediate value). For example, the LDA $00 instruction loads the byte at memory address $00 into A. STA $01 stores the byte in A into address $01. Addresses can be any value in the range 0 to SFFFF, assuming memory exists at the address and the address is not already in use for some other purpose. Using your preferred 6502 emulator, write 6502 assembly code to store a 16-bit value into addresses $00-$01, store a second value into addresses $02-$03, then add the two values and store the result in $04-$05. Be sure to propagate any carry between the two bytes. Ignore any carry from the 16-bit result. Test with $0000+$0001, $00FF+$0001, and $1234+$5678.

1. 6502 assembly language references data in memory locations using an operand value containing the address (without the # character that indicates an immediate value). For example, the LDA $00 instruction loads the byte at memory address $00 into A. STA $01 stores the byte in A into address $01. Addresses can be any value in the range 0 to SFFFF, assuming memory exists at the address and the address is not already in use for some other purpose. Using your preferred 6502 emulator, write 6502 assembly code to store a 16-bit value into addresses $00-$01, store a second value into addresses $02-$03, then add the two values and store the result in $04-$05. Be sure to propagate any carry between the two bytes. Ignore any carry from the 16-bit result. Test with $0000+$0001, $00FF+$0001, and $1234+$5678.

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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Concept explainers

Fundamentals of Input and Output Performance

The I/O subsystem is a component of computer system design that uses buses to assist communication between the Central Processing Unit, Computer Memory/Storage, and Input and Output Devices (that is known as peripheral devices). The I/O subsystem includes disc controllers, tape drives, discs, system buses, and other devices. The I/O database application reads and writes drives using the operating system windows I/O.

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1. 6502 assembly language references data in memory locations using an operand value containing the address (without the #
character that indicates an immediate value). For example, the LDA $00 instruction loads the byte at memory address $00 into A.
STA $01 stores the byte in A into address $01. Addresses can be any value in the range 0 to SFFFF, assuming memory exists at
the address and the address is not already in use for some other purpose. Using your preferred 6502 emulator, write 6502 assembly
code to store a 16-bit value into addresses $00-$01, store a second value into addresses $02-$03, then add the two values and
store the result in $04-$05. Be sure to propagate any carry between the two bytes. Ignore any carry from the 16-bit result. Test
with $0000+$0001, $00FF+$0001, and $1234+$5678.

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