71 lines
1.3 KiB
NASM
71 lines
1.3 KiB
NASM
|
@ $00000:
|
||
|
|
label vbuf:
|
||
|
|
|
||
|
|
@ $4B000:
|
||
|
|
$5B000 ; Set Instruction Pointer to $5B000
|
||
|
|
label RAX:
|
||
|
|
$0000000 ; RAX
|
||
|
|
$0000000 ; R2 - Temp Scratch
|
||
|
|
$0000000 ; R3 - Temp Scratch
|
||
|
|
$0000000 ; R4 - ARG 1
|
||
|
|
$0000000 ; R5 - ARG 2
|
||
|
|
$0000000 ; R6 - ARG 3
|
||
|
|
$0000000 ; R7 - ARG 4
|
||
|
|
$0000000 ; R8 - ARG 5
|
||
|
|
$0000000 ; RX
|
||
|
|
$0000000 ; RY
|
||
|
|
$0000000 ; RVBUF (RY * 640) + RX
|
||
|
|
|
||
|
|
@ $4B0C0:
|
||
|
|
|
||
|
|
import display.asm
|
||
|
|
import charset.asm
|
||
|
|
import strings.asm
|
||
|
|
import util.asm
|
||
|
|
|
||
|
|
; Common Strings
|
||
|
|
data ascii HelloWorld Welcome to Boo OS Running on Boo Byte Code!
|
||
|
|
data ascii Welcome !@#$%^&*()_+=-0987654321
|
||
|
|
data ascii Introspection We Can Now Do Introspection:
|
||
|
|
data ascii label_rax RAX:
|
||
|
|
data ascii label_rip RIP:
|
||
|
|
data ascii label_cycles Instruction Count:
|
||
|
|
|
||
|
|
|
||
|
|
; Kernel Begins
|
||
|
|
@ $5B000:
|
||
|
|
loadi $9 1;
|
||
|
|
loadi $A 1;
|
||
|
|
call set_pos
|
||
|
|
|
||
|
|
loadi $4 HelloWorld
|
||
|
|
call draw_string;
|
||
|
|
|
||
|
|
loadi $9 1;
|
||
|
|
loadi $A 10;
|
||
|
|
call set_pos
|
||
|
|
|
||
|
|
loadi $4 Welcome
|
||
|
|
call draw_string;
|
||
|
|
|
||
|
|
; OK! Time for some self referencing!!
|
||
|
|
loadi $9 1;
|
||
|
|
loadi $A 20;
|
||
|
|
call set_pos
|
||
|
|
|
||
|
|
loadi $4 Introspection
|
||
|
|
call draw_string;
|
||
|
|
|
||
|
|
loadi $9 1;
|
||
|
|
loadi $A 30;
|
||
|
|
call set_pos
|
||
|
|
|
||
|
|
loadi $4 label_cycles
|
||
|
|
call draw_string;
|
||
|
|
|
||
|
|
loadi $4 $4B000
|
||
|
|
loadi $2 $40
|
||
|
|
add $2 $4 $4
|
||
|
|
call print_addr
|
||
|
|
updsp
|
||
|
|
jmp $5B000;
|