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|
; -----------------------------------------------------------------------
;
; Copyright 2010-2015 Gene Cumm
;
; Portions from diskstart.inc:
; Copyright 1994-2009 H. Peter Anvin - All Rights Reserved
; Copyright 2009-2010 Intel Corporation; author: H. Peter Anvin
;
; This program is free software; you can redistribute it and/or modify
; it under the terms of the GNU General Public License as published by
; the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
; Boston MA 02110-1301, USA; either version 2 of the License, or
; (at your option) any later version; incorporated herein by reference.
;
; -----------------------------------------------------------------------
;
; geodsplib.inc
;
; Library file for geodsp*.asm
;
; ES:BX points to the buffer with address
; DX,CX as they should be for INT13h,AH=02
; Should work for C>=256
write_chs_lba:
; pushad
mov si,s_atchs
call writestr_early
call write_chs
call write_col_val_crlf
; popad
ret
; DX,CX as they should be for INT13h,AH=02
; Should work for C>=256
write_chs:
pushad
mov al,ch
mov ah,cl
shr ah,6
call writehex4
mov al,','
call writechr
mov al,dh
call writehex2
mov al,','
call writechr
mov al,cl
and al,3Fh
call writehex2
popad
ret
%ifdef TEST_EDD
write_edd_lba:
pushad
mov si,s_atchs
call writestr_early
call writehex8
call write_col_val_crlf
popad
ret
%endif ; TEST_EDD
write_col_val_crlf:
mov al,':'
call writechr
mov eax,[es:bx]
call writehex8
mov si,s_crlf
call writestr_early
ret
; write_exc:
; ; push ax
; mov al,'!'
; call writechr
; ; pop ax
; ret
; crlf:
; push si
; mov si,s_crlf
; call writestr_early
; pop si
; ret
;
;
; writestr_early: write a null-terminated string to the console
; This assumes we're on page 0. This is only used for early
; messages, so it should be OK.
;
writestr_early:
pushad
.loop: lodsb
and al,al
jz .return
call writechr
jmp short .loop
.return: popad
ret
writechr:
writechr_early:
pushad
mov ah,0Eh ; Write to screen as TTY
mov bx,0007h ; Attribute
int 10h
popad
ret
%include "writehex.inc"
s_atchs: db '@'
s_chs: db 'CHS'
s_space: db ' ', 0
s_typespec: db 'D='
s_type: db 'CHS', 0
s_end: db 0Dh, 0Ah, 'end'
s_crlf: db 0Dh, 0Ah, 0
; This indicates the general format of the last few bytes in the boot sector
BS_MAGIC_VER equ 0x1b << 9
|
