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ponydos
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Get rid of one (1) jump

This commit is contained in:
shikhin 2023-03-19 19:32:28 +05:30
parent e900a60d4a
commit 8178c7a715
1 changed files with 9 additions and 13 deletions
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22
ponydos.asm
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@ -42,7 +42,7 @@ initialize_mouse:
mov ax, 0xc205 mov ax, 0xc205
mov bh, 3 ; TODO: This is the usual PS/2 mouse packet size, but is it correct here? mov bh, 3 ; TODO: This is the usual PS/2 mouse packet size, but is it correct here?
int 0x15 int 0x15
jc .error jc initialize_mouse_error
; Set handler address ; Set handler address
; https://www.ctyme.com/intr/rb-1603.htm ; https://www.ctyme.com/intr/rb-1603.htm
@ -50,24 +50,14 @@ initialize_mouse:
; es is already set correctly ; es is already set correctly
mov bx, mouse_handler mov bx, mouse_handler
int 0x15 int 0x15
jc .error jc initialize_mouse_error
; Enable mouse ; Enable mouse
; https://www.ctyme.com/intr/rb-1596.htm ; https://www.ctyme.com/intr/rb-1596.htm
mov ax, 0xc200 mov ax, 0xc200
mov bh, 1 mov bh, 1
int 0x15 int 0x15
jc .error jc initialize_mouse_error
jmp .done
.error:
; https://www.ctyme.com/intr/rb-1601.htm
mov ax, 0xc201
int 0x15
jmp initialize_mouse
.done:
load_shell: load_shell:
push word 0x1000 push word 0x1000
@ -117,6 +107,12 @@ mainloop:
call flip_mouse_cursor call flip_mouse_cursor
jmp mainloop jmp mainloop
initialize_mouse_error:
; https://www.ctyme.com/intr/rb-1601.htm
mov ax, 0xc201
int 0x15
jmp initialize_mouse
; ------------------------------------------------------------------ ; ------------------------------------------------------------------
; Drawing subroutines ; Drawing subroutines
; ------------------------------------------------------------------ ; ------------------------------------------------------------------