Review how VIDEO BIOS Interrupt 10h is suppose to function!

You indicate string doesn't contain attributes with AX,1300h
BUT Never set BL to indicate attribute to use!

ALSO DL=column ...

You aren't being very clear!

If you are using a more recent computer but somehow using an old DOS interface and not in an emulator, then you can use 32-bit instructions in Real Mode. An operand...

The Auxiliary Carry (AF bit of Status Flags) is used for the carry out of bit 3 (0...7) into bit 4 for use in BCD operations! Think of it as a nibble carry!

You push each key until you get a linefeed 0ah then only pop one value. 0Dh is carriage return!

How many did you push? You need to count them! But using push-pop you're on the right track. Of...

Win32 From Win2000 and WinXP isolated the hardware to make it unaccessible directly from an application. Access was one of the nice features of Win98.

The books available here are my favorites. I...

Apples and Oranges. I'm not sure if the newer version has the capability of still building REAL mode apps. (Microsoft loves making things obsolete!) You can build a Win32 application and call a...

Code worked just fine for me! I cut'n'paste your last posting into test2.asm and built it. (I did tab most stuff since its not really suppose to be left justified!


I intentionally used MASM...

The simple answer is you can't.
The .386 and above have a Real Mode and a Protected Modes. Win32 such as XP, Win98, etc. are Protected Mode.

DOS is Real Mode. You can't mix and match without a...

Don't use the LODSB STOSB they aren't cost effective on short runs on newer processors. Do the mov, and inc yourself!

Everything looks correct but I still think its a Segment:Offset issue.

Initialize your Graphics card Page#0 column 0, row 0. Before doing anything.

And try writing your ASCII letters directly...

As an experiment replace your

lodsb ; AL = [DS:SI]

with

mov al,cs:[si]
inc si

You were using C definitions in the posted code.

Examine your CS register and IP register.
What are their hex values when you first begin the code?

Okay then.

Does your assembler understand C defines?

mov sp, 0x7c00

0x7c00 is a C definition.
0x10

Assemblers typically are looking for 07c00h

Are you clobberng your Segment register on purpose?

xor ax,ax ;zero out ax
mov ds,ax ;initialise data segment
mov ss,ax
...

I'm not sure why you aren't using one of the many free assemblers available instead of the ancient 1980 DOS debugger but yes. You'll have to enter your code instructions, then in adjacent memory (or...

then try offset Hola

or use LEA or something similar!

The idea is the data has to not be in the code flow, and you need to load its address into ds:dx.

Watch the spelling!
Are you doing...

You need to keep the ASCII text ouside the code flow or it will be treated like code, which it isn't!

You need to modify your code as to something as follows!


MOV AH,9 ; Write String to...

You're working in 16-bit RealMode but why is your origin at 7c00h ?


lodsb is equivalent to

;16-bit
mov al,ds:[si]
inc si

;32-bit

I definitely don't like NASM!
It has its own way of doing things....

; ------------------------------------------
; Keyboard input method
xVer: db 'Ver',0

Key: times 128 db 0 ; reserve...

Well finally a processor I'm not familiar with.
Not 80x86 unless its been macroized as assembly.

Is a bit similar looking to MIPS.

Look at the line number that contains the error and look for things.


Line#35
You may need the label on the same line as instruction. Some assemblers require this, some don't!

main: MOV...

One step at a time


xVer db 'Ver',0
Key db dup(128)
Kscan db dup(128)


xor bx,bx

I don't understand your question. If you have to clear it yourself and are working in an old style Real Mode code where the BIOS services are exposed.

I'm kind of rusty at this...

mov...

After data entry, remove carriage return and set a terminator!

Create a master list of commands! A table lookup of string addresses and scan through the list one at a time and do a caseless...

Different ways.
One is to clear the screen yourself by writing to the display Segment:Offset.


Using Video Services interrupt 10h, command ah=0 Set the video mode again! (Not really the best way...

You're using the 0x10 VIDEO BIOS services handler for your video handling so use the 0x16 KEYBOARD BIOS services handler for your keyboard handling!


; Get Keyboard value (and wait for...

Doesn't bother me. Only noticed when I was looking for alternate questions to reply to.

Posting on competitors site too!

Spelling of your ASCII$ string buffer.
To be consistent
LEA DX, message

And the missing $ terminator!
message DB 'Test!$'
or
message DB 'Test!','$'

Actually your code needs work. Compare what you have to the following...

.model small
.stack 100h
.data
.code

start:
mov ah,1 ; input character from keyboard (with echo)
int 21h ;...

When doing 80x86 I use C/C++ with either inline assembly, or MASM assembled files linked to the exe.

MIPS its usually SNSystems.
PowerPC its a couple different IDE's.
Rabbit SofTools
PIC18F ...

I realize English isn't your primary language but you need to try better as your request is not clear!

You covered up your code so we can no longer see it!
DOS used a '$' terminator so if you're...

I'm not sure of what you're trying to say,
but DOS interrupt is 21h ; 21 Hex not 21 decimal.
DOS terminate is 20h ; 20 Hex not 20 decimal

In the assembler you enter ...

Yes, $v0 $v zero $vo is a mistake!

There are many languages out there. Some companies build applications using Java. Some C, Pascal, Visual Basic, Basic, Fortran, Cobol (though fewer and...

And thankyou for your help! I've been programming professionally since 1979 and have built multi-million line programs. But over the years I've been isolated as to designing and building new...

You print the four robot_state lines but you aren't printing based upon if 1 or 2 or 3 or 4.

So without using conditionals, try this instead!
It uses the robot_state as an index into a string...

I missed it change those two syscal to syscall

Change $vo to $v0 zero

Since this is no longer a school project I went in and cleaned top to bottom. You need to finish at bottom where indicated.
Review each section of code and understand how it works!


.data #...

Done: Should be near bottom of file just above the robot_state 4 case code that doesn't exist yet!

# Process new robot positions

j PrtOut

MoveHop: j MoveLoop

Done:

The clear matrix should look like this then...

# Clear Entire Maze Array

la $t0, maze # load address of maze
li $t3, 0 # <-- Fill maze with (0)
li $t1, 144

clr: # repeat if...