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Index > DOS > Three games - 24 bytes each (May Be The Smallest PC Games)

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sourcerer



Joined: 06 Apr 2011
Posts: 4
sourcerer
It's joke. Only two of them are 24 byte-sized. Third is 27 bytes.
I wrote a topic about this games (on russian!): http://habrahabr.ru/blogs/asm/119765/
Very Happy you can play them if you want. You need DOS or Dosbox of NTVDM, but for third game you should use 8086 Very Happy

First:
First gamer press any key on keyboard. Second gamer press keys on keyboar until he press first pressed key. Otherwise he'll get a hint
Code:
org 100h
;;Guess what key was pressed

 int 16h ;;Wait for keyboard press
 mov bl, al ;;Save keycode

 still: ;;Main loop
 int 29h ;;Print entered symbol

 mov ax, 1*256+13;;al=13 - carriage return, ah=1 - check keyboard
 int 29h

 int 21h

 cmp al, bl ;;compare keycodes
 mov al, '+'
 ja still
 mov al, '-'
 jb still

 true:
 ret
    


Second:
There are 19 sticks on the table. Press number key to take few. You MUST press 1, 2 or 3. Otherwise your PC opponent will be mad 'coz you broke the rules Very Happy So, you and your PC takes sticks from the table until somebody takes last stick
Code:
org 100h
;;Famous Bashe game

 mov dl, 15+4 ;;dl=number of sticks

 still: ;;Main loop
 sub dl, 4
 js fin

 mov ax, 1*100h+'|' ;;Out stick sumbol
 mov cl, dl ;;in loop
 disp: ;;from 1 to cl stick
 int 29h ;;callin 29h
 loop disp

 int 21h

 sub al, '0' ;;Convert ASCII to real number

 cmp dl, al ;;If you take last stick you won
 jne still

 win:
 int 29h ;;Print heart symbol

 fin:
 ret
    


Third:
Try to get three same symbols pressing "right arrow". It's VERY difficult, but few people can do this. You need very slow PC or emulator to play this game.
Code:
;;Roulette (one-handed bandit)

org 100h

 push 0b800H ;;Working with videomemory
 pop ds 

 le: ;;out symbol
 inc bx
 inc bx ;;move cursor

 inf: ;;Almost infinite loop
 int 1AH ;;Call timer
 add dl, bl ;;Avoid player to win with fast "right arrow" pressing
 mov [bx], dl ;;Out symbol to the screen

 ;;Keyboard handle
 in al, 60H
 cmp al, 77 ;;Pressed "right arrow", go to next symbol
 jnz inf ;;Almost infinite loop loops almost infinite

 re: ;;It's time to print next symbol or stop roulette
 cmp bx, 6
 jnz le

 ret ;;Fin
    
Post 04 Oct 2011, 16:08
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Goplat



Joined: 15 Sep 2006
Posts: 181
Goplat
sourcerer wrote:
You need DOS or Dosbox of NTVDM, but for third game you should use 8086 Very Happy
The 8086 didn't have a "push immediate" instruction, that was introduced in the 80186 :p
Post 04 Oct 2011, 20:16
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sourcerer



Joined: 06 Apr 2011
Posts: 4
sourcerer
Ow Very Happy I didn't knew that.
Post 05 Oct 2011, 12:03
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addes3



Joined: 09 May 2011
Posts: 29
addes3
Obviously wasn't tested on a 8086 Smile
Post 05 Oct 2011, 23:50
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