lsfs_16-bit now includes its own print functions

std_singos/stdio.h

@@ -8,11 +8,27 @@ char* string;
     push bp
     mov bp,sp
     mov si,4[bp]
-    call 0x0000:0x7C47
+
+    ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+    new_print_print:
+    ; Prints string in si
+    ; IN si: zero terminated string to print
+    ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+        mov ah, #0xE     ; Specify 'int 0x10' 'teletype output' function
+                        ; [AL = Character, BH = Page Number, BL = Colour (in graphics mode)]
+    .new_print_printchar:
+        lodsb           ; Load byte at address SI into AL, and increment SI
+        test al, al
+        jz .new_print_done        ; If the character is zero (NUL), stop writing the string
+        int #0x10         ; Otherwise, print the character via 'int 0x10'
+        jmp .new_print_printchar  ; Repeat for the next character
+    .new_print_done:
+
     pop bp
 #endasm
 }
 
+
 void print_stack(argument)
 {
 #asm 
@@ -24,7 +40,20 @@ void print_stack(argument)
     mov ax, ss
     mov ds, ax
     mov si,4[bp]
-    call 0x0000:0x7C47
+    ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+    print_stack_print:
+    ; Prints string in si
+    ; IN si: zero terminated string to print
+    ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+        mov ah, #0xE     ; Specify 'int 0x10' 'teletype output' function
+                        ; [AL = Character, BH = Page Number, BL = Colour (in graphics mode)]
+    .print_stack_printchar:
+        lodsb           ; Load byte at address SI into AL, and increment SI
+        test al, al
+        jz .print_stack_done        ; If the character is zero (NUL), stop writing the string
+        int #0x10         ; Otherwise, print the character via 'int 0x10'
+        jmp .print_stack_printchar  ; Repeat for the next character
+    .print_stack_done:
     
     pop ax
     pop ds
@@ -45,7 +74,26 @@ void* input;
 #asm
     push bp
     mov bp,sp
-    call 0x000:0x7C2A
+
+    pusha           ; save registers
+    mov bx, ax
+    mov ah, #0xE     ; Teletype output
+
+    mov cx, #4       ; 4 nipples in a 16 bit word
+    .dump_ax_loop:
+    rol bx, #4       ; rotate to next nipple
+    mov al, bl      ; we copy to al because we need to mask only the low 4 bits
+    and al, #%1111   ; Do the masking
+    add al, #48     ; convert to ASCII
+    cmp al, #57     ; If we are greater than 9 ascii, we add 7 to make digit 10 be represented as 'A'
+    jbe .dump_ax_skip       ;  -|-
+    add al, #7       ;  -|-
+    .dump_ax_skip:          ;  -|-
+    int #0x10        ; BIOS call 'output'
+    loop .dump_ax_loop
+
+    popa            ; restore registers
+
     pop bp
 #endasm
 }