Answered: This is my assembly code. It draws a…

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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This is my assembly code. It draws a pink square 32x32 from position 0. My goal is to make a checkboard pattern. Can you finish the code so it does that. This is a 16bit simulator of assembly. Only four registers for arithematics.

draw1:
MOV A, 2 ; Set the bitmap mode .
OUT 7
MOV A, 3 ; Clear the video memory .
OUT 7
MOV C, 0
NOT D
MUL 32
MOV B, D
draw2:
MOV A, B
OUT 8
MOV A, 238
OUT 9
ADD B, 1 ; paints
ADD C, 1 ;increments counter
CMP C, 32
JZ row
CMP C, 64
JZ row
CMP C, 96
JZ row
CMP C, 128
JZ row
CMP C, 160
JZ row
CMP C, 192
JZ row
CMP C, 224
JZ row
CMP C, 256
JZ row
CMP C, 288
JZ row
CMP C, 320
JZ row
CMP C, 352
JZ row
CMP C, 384
JZ row
CMP C, 416
JZ row
CMP C, 448
JZ row
CMP C, 480
JZ row
CMP C, 512
JZ row
CMP C, 544
JZ row
CMP C, 576
JZ row
CMP C, 608
JZ row
CMP C, 640
JZ row
CMP C, 672
JZ row
CMP C, 704
JZ row
CMP C, 736
JZ row
CMP C, 768
JZ row
CMP C, 800
JZ row
CMP C, 832
JZ row
CMP C, 864
JZ row
CMP C, 896
JZ row
CMP C, 928
JZ row
CMP C, 960
JZ row
CMP C, 992
JZ row
CMP C, 1024
JZ row
JMP draw2
row:
ADD B, 256
SUB B, 32
CMP C, 1024
JZ exit
JMP draw2:
exit:
HLT

Note: Try to follow the syntax like i did so that i can compile it when i get the result. Also the screen is 256x256 pixels

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