1 ;; -----------------------------------------------------------------------
3 ;; Copyright 1994-2004 H. Peter Anvin - All Rights Reserved
5 ;; This program is free software; you can redistribute it and/or modify
6 ;; it under the terms of the GNU General Public License as published by
7 ;; the Free Software Foundation, Inc., 53 Temple Place Ste 330,
8 ;; Boston MA 02111-1307, USA; either version 2 of the License, or
9 ;; (at your option) any later version; incorporated herein by reference.
11 ;; -----------------------------------------------------------------------
16 ;; Header file for the BIOS data structures etc.
22 absolute 4*1Eh ; In the interrupt table
27 serial_base resw 4 ; Base addresses for 4 serial ports
29 BIOS_fbm resw 1 ; Free Base Memory (kilobytes)
31 BIOS_page resb 1 ; Current video page
33 BIOS_timer resw 1 ; Timer ticks
35 BIOS_magic resw 1 ; BIOS reset magic
37 BIOS_vidrows resb 1 ; Number of screen rows