From 07932e2ce04cf698e78f9bb2048b75326f2af29d Mon Sep 17 00:00:00 2001
From: deadvey <deadvey@deadvey.com>
Date: Thu, 16 Oct 2025 13:56:17 +0100
Subject: [PATCH] Pong

I forgot to commit for a while and I haven't done much, but got the very basics of the game pong working.

Signed-off-by: deadvey <deadvey@deadvey.com>
---
 build-linux.sh               |   2 +-
 disk_images/crawos.flp       | Bin 1474560 -> 1474560 bytes
 disk_images/crawos.iso       | Bin 1835008 -> 1835008 bytes
 source/features/graphics.asm |  39 +++++----
 source/features/screen.asm~  | 162 -----------------------------------
 source/functions/math.asm    |   0
 source/games/pong.asm        | 106 +++++++++++++++++++----
 source/games/pong_old.asm    |  86 +++++++++++++++++++
 source/kernel.asm            |   6 +-
 source/kernel.bin            | Bin 580 -> 730 bytes
 10 files changed, 202 insertions(+), 199 deletions(-)
 delete mode 100755 source/features/screen.asm~
 create mode 100644 source/functions/math.asm
 create mode 100644 source/games/pong_old.asm

diff --git a/build-linux.sh b/build-linux.sh
index 66caf65..a3a62a3 100755
--- a/build-linux.sh
+++ b/build-linux.sh
@@ -66,5 +66,5 @@ mkisofs -quiet -V 'MIKEOS' -input-charset iso8859-1 -o disk_images/crawos.iso -b
 
 echo '>>> Done!'
 
-qemu-system-i386 -drive file=disk_images/crawos.flp,index=0,if=floppy,format=raw
+#qemu-system-i386 -drive file=disk_images/crawos.flp,index=0,if=floppy,format=raw
 
diff --git a/disk_images/crawos.flp b/disk_images/crawos.flp
index 3d3461d0394fd4ba4ff7cc7253cdcce4565e115c..4044973022a3c9cd2bc0d9af16776b913fab32c7 100755
GIT binary patch
delta 1865
zcmZo@h-zqv+F+)}VU!jS&CGC%X|o{Hd%?{LOqaPgxfn1qewl3OdZ>O2&jy}uK3S%2
zF?pt!3=C%ltoam~N?06UeEAO&wiZ)nDq(SY@$CO$1}NZv!OZZYh2h2S{|hfLEtX|k
ztjN?YcZsP}PM(Qb?gmq*oHEmk75^7rfy-S(mFxL`xLfQJQ{yXEhEB2cOH41e{(ou4
z02Vp~61v3nV)6f%Dh%CX*Px27F};}h|D_N_1gz#7(~J85FBuqK?D%WLQ6g+pUb5Dv
zxMa6Ybje8@^^)r^pZ$N)`}f7qzpM<b4AzXS3?eYUKL7>5D51bK8U~|bFq#)ev%%)k
LY=Ac#++YC!+vJ^C

delta 1715
zcmZo@h-zqv+F+)}p;&f0ikZQMX|o{Hd%?{LOqaPgxfn1qzMX97dMGeq3(p3gZa!<K
zZZTV?mkbPN1+4k(nMzn3Uwruw61Em|WGZ2CdhzUk;`xLZ$N#@L`~QXEzn5GLFKqtV
zaFj5={PzEa;=jbhtPHFSatwM5JTO}xfUFuN6qrWCU^EOy^TKF0*gTpI@MeQtRsg!M
BWPAVs

diff --git a/disk_images/crawos.iso b/disk_images/crawos.iso
index 6dc1a1fb138f4912183eb437e5afd175ecd214bc..1133aac1033514db252becd301601aec0785be4f 100644
GIT binary patch
delta 643
zcmZo@C}?OX*s#8VmrH=xP=$qwfq{{MfpK$Ta}(oayQa^wh6aXahQ=nA#%7krEJg-K
zrpN-5{hGyikOejuG*1zc4aq1~@J}vLFf>yzG`2Fav@$kR0BPki)-y2LtTN*kJ1YYN
z!_MkW3xpL|!S+s;I3NpUS;1K`2h<^An>!AyGvzQ!3y5ZBxW%-Q@sR8`5k><>#xK(i
zMHvs(Z{gX%)6FN#)Ga2@^pb($tbjG2B2x*A<BKo<LBiHz%1k9JPA{JQKg<9H{4bap
zUbHa0*!_Ru1*XNaOp6tny5%l0b;`*zG0WXx>XcJvda>gF!YgpOYp8NP{||SIU1Dl{
z#mdkrmVSxp#n%5X%^1K!hd@G?m|iUY|5AmaTkINC(KV(Q6aT*yf{1|CTw{7s|NkWe
z!;2k%Z8%DVZOTj5+7y@Uwuvq|X`^0p{pGX&FM9vJ`1zNWftA6Uk(EJYBjf-2jRGHr
I8P3Q70N`i>iU0rr

delta 493
zcmZo@C}?OX*s#8VmyMg>kcEYbfq{{MfpK$Ta}(oayQa^w24;qahNdQ#1||j;EJg-K
zrpN-5{hGyikOejuG*1yx2v1E>@G8wyFf>#!G_^9Zv@$SJ0BPki)-y0lG_c&PIO7&O
z(@y(M3xpL|!S+s;I3NpUS;1K`2h<^An>!AyGv!b$I~~Q$;KH<#@sR8`5k><>#<$ZA
zMHvqTCT!u^z|+lV&D1Ss%k+|g;jDl)pFL9vi{pzg|3SjmVvbBDEKV<;{ZBlf@Z$LY
z7ia&!F#PwDi{XXMKO2q`=9l08zfk;_c$k%el|ha{kAY_+<Nx}N0w0DM{+j~;XOGH1

diff --git a/source/features/graphics.asm b/source/features/graphics.asm
index a56b42f..e15a90c 100644
--- a/source/features/graphics.asm
+++ b/source/features/graphics.asm
@@ -16,8 +16,6 @@ os_set_graphics_mode:
 ; y_start
 ; colour
 os_draw_graphical_rectangle:
-	pusha
-
 	; Tell BIOS we're changing 'da pixels!
 	mov ah, 0Ch
 
@@ -28,21 +26,28 @@ os_draw_graphical_rectangle:
 
 	jmp .x_loop
 
-	.x_loop:
-		int 10h
-		cmp cx, [x_end]
-		je .next_row
-		inc cx
-		call .x_loop
+.x_loop:
+   int 10h
+   cmp cx, [x_end]
+   je .next_row
+   inc cx
+   call .x_loop
 
-	.next_row:
-		mov cx, [x_start]
-		cmp dx, [y_end]
-		je .finish
-		inc dx					; Increase Row
-		call .x_loop
+.next_row:
+   mov cx, [x_start]
+   cmp dx, [y_end]
+   je .finish
+   inc dx					; Increase Row
+   call .x_loop
 
-	.finish:
-		popa
-		Iret
+.finish:
+   ret
+
+
+section .data
+	x_start dw 0
+	y_start dw 0
+	x_end dw 0
+	y_end dw 0
+	colour db 1111b
 
diff --git a/source/features/screen.asm~ b/source/features/screen.asm~
deleted file mode 100755
index c20a56b..0000000
--- a/source/features/screen.asm~
+++ /dev/null
@@ -1,162 +0,0 @@
-; ==================================================================
-; MikeOS -- The Mike Operating System kernel
-; Copyright (C) 2006 - 2021 MikeOS Developers -- see doc/LICENSE.TXT
-;
-; SCREEN HANDLING SYSTEM CALLS
-; ==================================================================
-
-; ------------------------------------------------------------------
-; os_print_string -- Displays text
-; IN: SI = message location (zero-terminated string)
-; OUT: Nothing (registers preserved)
-
-os_print_string:
-	pusha
-
-	mov ah, 0Eh			; int 10h teletype function, we're telling the BIOS we will print something
-
-.repeat:
-	lodsb				; Get char from si into al
-	cmp al, 0			; Compare al to 0
-	je .done			; If char is zero, end of string
-
-	int 10h				; Otherwise, print it
-	jmp .repeat			; And move on to next char
-
-.done:
-	popa
-	ret
-
-; Exact same as the above procedure, but this adds a newline 
-; after priting, similar to the difference between Rust's print! and println!
-os_print_string_nl:				pusha
-
-	mov ah, 0Eh			; int 10h teletype function, we're telling the BIOS we will print something
-
-.repeat:
-	lodsb				; Get char from si into al
-	cmp al, 0			; Compare al to 0
-	je .done			; If char is zero, end of string
-
-	int 10h				; Otherwise, print it
-	jmp .repeat			; And move on to next char
-
-.done:
-	call os_print_newline
-	popa
-	ret
-
-; --------------------------------------------
-
-os_print_newline:
-	pusha
-
-	mov ah, 03h
-	int 10h
-	
-	mov ah, 02h
-	add dh, 1
-	mov dl, 0
-	int 10h
-	
-	popa
-	ret
-		
-
-; -------------------------------------------
-
-os_clear_screen:
-        pusha
-
-	mov ah, 00h
-	mov al, 03h 		; Set video mode to textmode (80x25). 16 colors, 8 pages
-	int 10h
-
-	mov ah, 02h
-	mov dh, 0
-	mov dl, 0
-	int 10h
-
-        popa
-        ret
-
-; -------------------------------------------
-
-; AX = key pressed
-os_read_input:
-	mov ah, 11h			; BIOS call to check for key
-	int 16h				; Interrupt
-	jnz .key_pressed		; Jump if input isn't 0
-	
-	hlt
-	jmp os_read_input
-
-.key_pressed:
-	mov ah, 10h
-	int 16h
-	ret
-
-; -------------------------------------------
-
-os_display_input:	
-	pusha
-	mov cx, prompt_length ; Characters remaining
-	
-.loop:
-	call .check_key_pressed
-
-        jmp .loop
-
-.check_key_pressed:	
-        call os_read_input
-
-	cmp al, 08h
-	je .backspace
-
-	cmp al, 0Dh
-	je .enter_key
-
-	cmp al, 1Bh
-	je .esc_key
-
-	dec cx
-	call .print_current_input
-	ret
-
-.esc_key:
-	call os_reboot
-
-.enter_key:
-	mov al, 0
-	stosb
-	mov di, user_input
-	popa
-	call os_read_cli
-
-.backspace:
-	cmp cx, prompt_length			; If bx < 20
-	jl .move_cursor_back			; then .move_cursor_back
-	call .loop				; Else .loop
-
-.move_cursor_back:
-	mov ah, 0Eh
-
-	mov al, 08h
-	int 10h
-	mov al, 20h
-	int 10h
-	mov al, 08h
-	int 10h
-
-	dec di
-	inc cx
-	jmp os_display_input
-
-.print_current_input:
-	stosb
-	
-	mov ah, 0Eh
-	int 10h
-
-
-	ret
diff --git a/source/functions/math.asm b/source/functions/math.asm
new file mode 100644
index 0000000..e69de29
diff --git a/source/games/pong.asm b/source/games/pong.asm
index 6018bdd..852340e 100644
--- a/source/games/pong.asm
+++ b/source/games/pong.asm
@@ -1,27 +1,99 @@
 game_pong:
-	pusha
+   call .draw_players
+   call .detect_input
 
-	call os_set_graphics_mode
+; Clears screen and draws both players and ball
+.draw_screen:
+   call os_set_graphics_mode ; Clear screen
+.draw_p1:
+   ; Player 1
+   mov ax, [p1_x]
+   mov [x_start], ax
+   mov [x_end], ax
 
-	call os_draw_graphical_rectangle
+   mov bx, [p1_y]
+   mov [y_start], bx
+   add bx, [bat_height]
+   mov [y_end], bx
+
+   call os_draw_graphical_rectangle ; Draw player 1
+.draw_p2:
+   ; Player 2
+   mov ax, [p2_x]
+   mov [x_start], ax
+   mov [x_end], ax
+
+   mov bx, [p2_y]
+   mov [y_start], bx
+   add bx, [bat_height]
+   mov [y_end], bx
+
+   call os_draw_graphical_rectangle ; Draw player 1
+   ret
+
+; Player 1 movements
+.p1_up:
+   mov dx, [p1_y]
+   sub dx, 5
+   mov [p1_y], dx
+   call .draw_players
+   jmp .detect_input
+.p1_down:
+   mov dx, [p1_y]
+   add dx, 5
+   mov [p1_y], dx
+   call .draw_players
+   jmp .detect_input
+
+; Player 2 movements
+.p2_up:
+   mov dx, [p2_y]
+   sub dx, 5
+   mov [p2_y], dx
+   call .draw_players
+   jmp .detect_input
+.p2_down:
+   mov dx, [p2_y]
+   add dx, 5
+   mov [p2_y], dx
+   call .draw_players
+   jmp .detect_input
+
+; Ball bouncing
+.bounce_ball:
 
-	call os_set_text_mode
-	jmp .finish
 
 .detect_input:
-	call os_read_input
-	cmp al, 08h
-	je .finish
-	jmp .detect_input
+   call os_read_input
+   cmp al, 08h
+   je .finish
+
+   ; Player 1
+   cmp al, 77h       ; Pressed 'w' (player 1 up)
+   je .p1_up
+   cmp al, 73h       ; Pressed 's' (player 1 down)
+   je .p1_down
+
+   ; Player 2
+   cmp al, 5bh       ; Pressed '[' (player 2 up)
+   je .p2_up
+   cmp al, 27h       ; Pressed ''' (player 2 down)
+   je .p2_down
+
+   jmp .detect_input
 
 .finish:
-	call os_set_text_mode
-	popa
-	ret
+   call os_set_text_mode
+   call os_start_cli
 
 section .data
-	x_start dw 5
-	y_start dw 5
-	x_end dw 30
-	y_end dw 46	
-	colour db 1100b
+   ball_x dw 5
+   ball_y dw 5
+
+   p1_x dw 5
+   p1_y dw 5
+
+   p2_x dw 315
+   p2_y dw 5
+
+   bat_height dw 20
diff --git a/source/games/pong_old.asm b/source/games/pong_old.asm
new file mode 100644
index 0000000..ec82717
--- /dev/null
+++ b/source/games/pong_old.asm
@@ -0,0 +1,86 @@
+game_pong:
+	pusha
+	call os_set_graphics_mode
+	jmp .draw_player_1
+	jmp .draw_player_2
+	jmp .detect_inputi
+.draw_player_1:
+	; X coords
+	mov ax, [p1_x]
+	mov [x_start], ax
+	mov [x_end], ax
+
+	; Y coords
+	mov bx, [p1_y]
+	mov [y_start], bx
+	add bx, [bat_height] ; Add the bat height to the y coord
+	mov [y_end], b
+	call os_draw_graphical_rectangle
+	ret
+.draw_player_2:
+	; X coords
+	mov ax, [p2_x]
+	mov [x_start], ax
+	mov [x_end], ax
+
+	; Y coords
+	mov bx, [p2_y]
+	mov [y_start], bx
+	add bx, [bat_height] ; Add the bat height to the y coord
+	mov [y_end], bx
+
+	call os_draw_graphical_rectangle
+	ret
+.detect_input:
+	call os_read_input
+	; Exit if backspace is pressed
+	cmp al, 08h
+	je .finish
+	; Go up when you press 'w'
+	cmp al, 77h
+	je .p1_up
+	; Go up when you press 's'
+	cmp al, 73h
+	je .p1_down
+
+	; Loop back
+	jmp .detect_input
+.p1_down:
+	; X coords
+	mov ax, [p1_x]
+	mov [x_start], ax
+	mov [x_end], ax
+
+	; Y coords
+	mov bx, [p1_y]
+	add bx, 5 ; Move the bat down 5
+	mov [y_start], bx
+	add bx, [bat_height] ; Add the bat height to the y coord
+	mov [y_end], bx
+
+	call os_draw_graphical_rectangle
+	ret
+.p1_up:
+    mov ax, [move_distance]
+	sub ax, [p1_y]
+	call os_draw_graphical_rectangle
+	ret
+.finish:
+	call os_set_text_mode
+	popa
+	ret
+
+section .data
+	x_start dw 0
+	y_start dw 0
+	x_end dw 0
+	y_end dw 0
+
+	p1_y dw 5
+	p2_y dw 0
+	p1_x dw 5
+	p2_x dw 30
+
+	bat_height dw 20
+	move_distance dw 5
+	colour db 1111b
diff --git a/source/kernel.asm b/source/kernel.asm
index ea73479..912ca67 100755
--- a/source/kernel.asm
+++ b/source/kernel.asm
@@ -60,7 +60,6 @@ Sides dw 2
 
 ; ------------------------------------------------------------------
 ; FEATURES -- Code to pull into the kernel
-
 	%INCLUDE "features/screen.asm"
 	%INCLUDE "features/cli.asm"
 	%INCLUDE "features/power.asm"
@@ -68,7 +67,10 @@ Sides dw 2
 	%INCLUDE "features/graphics.asm"
 	%INCLUDE "features/sound.asm"
 
-; GAMES
+; FUNCTIONS -- Other stuff that is useful
+    %INCLUDE "functios/math.asm"
+
+; GAMES -- Games that I wrote for it
 	%INCLUDE "games/pong.asm"
 
 ; ==================================================================
diff --git a/source/kernel.bin b/source/kernel.bin
index 5e5bb3ed9be6fe3a9a9bd7853a07c5f0c87f84aa..c3efb35f5e7e066ed28bd0be01b5234cb5009685 100644
GIT binary patch
delta 246
zcmX@Ya*K6?0VCs=$%c%F>bLN0;OXX*W$G4_XL`xNa8|&YPm!sF#qq_L{~%#&F=eI_
z7N-}_{vT$50{$1w3@=(3UhMwA@B-6fS*FE`Ox<#qm^$U;nV98nFm=i)Grd^xf8iCl
z+%;6Wp8tot#V#>5zG7wQ6wA28^kVD(mu3uLp+g{{OH3~o|9`2%&@FZis^}Wii;4eV
z3PD7`YOXQ8sQ>?xf#JoDzcw5t!Zzh4Yi){4cH2akoU~Cdx&HFm{};V~U;O;b%D~EC
K&B)3i!T<o(Y+q0S

delta 95
zcmcb`dW2<z0VCtv$%c%F0u#3IY~bnUvu5fRvt@e8z;IT;n$Mo8gvIg2m;WGPYcWTr
z5*DWy&;BQ#Pk3?s|BJK#Ul{&-$;I%(=AR8m3G>Tu|6eHnOFYcVz{()UpvS-i0Q;RL
A`Tzg`