added some gameboard initialization

src/alloc.asm

@@ -21,3 +21,4 @@ alloc:; Takes lenght of data in rdi and returns pointer in rax
 	mov [brk_pointer], rax
 	pop rax
 	ret
+

src/drawing.asm

@@ -0,0 +1,54 @@
+%include "symbols.asm"
+
+section .bss
+	extern gameboard_ptr
+
+	extern term_rows
+	extern term_cols
+
+section .data 
+	clear: 		db ESC_CHAR, "[2J", 0
+	reset:		db ESC_CHAR, "[0m", 0
+
+	statusbar:	db ESC_CHAR, "[100m", "Use arrow keys to move cursor, enter to invert cell, p to       simulation", 0
+
+
+
+section .text 
+extern print_str
+extern string_copy
+
+init_gameboard:
+	mov ax, [term_cols]
+	mov cx, [term_rows]
+	mul rcx
+
+	mov rdx, rax
+	sub rdx, rcx; get pointer to start of last line
+	
+	lea rdi, [gameboard_ptr]
+	add rdi, rax; get end of gameboard 
+	
+	sub rdi, 5; get space for reset sequence
+	
+	lea rsi, [reset]
+
+	push rdx
+	call string_copy
+
+	pop rdx
+	mov rdi, rdx
+	lea rsi, [statusbar]
+	call string_copy
+
+	ret
+	
+
+print_game_ui:
+	lea rdi, [clear]
+	call print_str
+
+
+	
+	
+	ret

src/input.asm

@@ -0,0 +1,12 @@
+
+section .bss
+	cursor_rows: RESW 1
+	cursor_cols: RESW 1
+
+section .text
+
+global handle_user_input
+handle_user_input:
+
+	
+	

src/main.asm

@@ -6,6 +6,11 @@ section .bss
 	term_rows: RESW 1
 	term_cols: RESW 1
 
+	gameboard_ptr: RESQ 1
+
+	extern cursor_rows
+	extern cursor_cols
+
 section .data
 	
 section .text
@@ -39,12 +44,12 @@ _start:
 	call init_alloc
 
 	mov ax, [term_rows]
-	dec ax; one less than terminal size for statusbar
 	mov cx, [term_cols]
 	mul rcx
 	mov rdi, rax
 	call alloc
-	mov r15, rax; stores pointer to gameboard array
+	mov [gameboard_ptr], rax; stores pointer to gameboard array
+
 
 
 

src/str.asm

@@ -7,7 +7,7 @@ print_str: ; takes pointer to string in rdi and retuns in rax
     push rsi
     push rdx
     mov rsi, rdi
-    mov rdx, 0
+    xor rdx, rdx
 
 .count_loop:
     cmp byte [rsi+rdx], 0
@@ -25,7 +25,7 @@ print_str: ; takes pointer to string in rdi and retuns in rax
 
 global unsigned_int_to_ascii
 unsigned_int_to_ascii: ; takes pointer to array in rdi and value stored in rsi DOES NOT BOUNDS CHECK
-    mov r11, 0
+    xor r11, r11
     mov rcx, 10
     mov rax, rsi
 
@@ -41,7 +41,7 @@ unsigned_int_to_ascii: ; takes pointer to array in rdi and value stored in rsi D
 .loop_count_exit:
     push rax
 
-    mov rcx, 0
+    xor rcx, rcx
 
 .store_loop: ; basicly for loop
     cmp rcx, r11
@@ -60,3 +60,15 @@ unsigned_int_to_ascii: ; takes pointer to array in rdi and value stored in rsi D
 
     ret
 
+string_copy:; takes pointer to destination in rdi and pointer to source in rsi
+	
+	xor rax, rax
+
+	.copy_next_byte:
+	mov byte al, [rdi+rax]
+	mov [rsi+rax], al
+	inc rax
+	test rax,rax
+	jnz .copy_next_byte
+	ret
+	

src/symbols.asm

@@ -7,3 +7,4 @@ STDOUT		equ 1
 TIOCGWINSZ	equ 0x5413
 
 ASCII_ZERO 	equ 48
+ESC_CHAR 	equ 27