56 lines
1.8 KiB
C
56 lines
1.8 KiB
C
/* BIOS definitions. Each BIOS entry has an index that is to be used with the
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* sys_bioscopy() system call. The raw addresses, sizes, and magic numbers
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* are defined here as well. The values that are defined here were collected
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* from various kernel files in MINIX 2.0.4.
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*
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* Author: Jorrit N. Herder
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*/
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#ifndef _BIOS_H
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#define _BIOS_H
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/* Memory check (is stopped on reboot). */
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#define BIOS_MEM_CHECK 0 /* address to stop memory check */
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#define ADR_MEM_CHECK 0x472L
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#define LEN_MEM_CHECK 1L
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#define STOP_MEM_CHECK 0x1234 /* magic number to stop memory check */
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/* Centronics printers. */
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#define BIOS_PRN_PORTBASE 1 /* base of printer ports */
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#define ADR_PRN_PORTBASE 0x408L
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#define LEN_PRN_PORTBASE 2L
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/* Hard disk parameter vectors. */
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#define BIOS_WINI_PARAMS 2 /* number of hard disk drives */
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#define ADR_WINI_PARAMS 0x475L
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#define LEN_WINI_PARAMS 1L
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#define BIOS_WINI_0_PARM_VEC 3 /* disk 0 parameters */
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#define ADR_WINI_0_PARM_VEC 0x41*4L
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#define LEN_WINI_0_PARM_VEC 4L
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#define BIOS_WINI_1_PARM_VEC 4 /* disk 1 parameters */
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#define ADR_WINI_1_PARM_VEC 0x46*4L
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#define LEN_WINI_1_PARM_VEC 4L
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/* Video controller (VDU). */
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#define BIOS_VDU_COLUMNS 5
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#define ADR_VDU_COLUMNS 0x44AL
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#define LEN_VDU_COLUMNS 2L
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#define BIOS_VDU_CRTBASE 6
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#define ADR_VDU_CRTBASE 0x463L
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#define LEN_VDU_CRTBASE 2L
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#define BIOS_VDU_ROWS 7
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#define ADR_VDU_ROWS 0x484L
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#define LEN_VDU_ROWS 1L
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#define BIOS_VDU_FONTLINES 8
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#define ADR_VDU_FONTLINES 0x485L
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#define LEN_VDU_FONTLINES 2L
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/* Machine ID. */
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#define BIOS_MACHINE_ID 9
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#define ADR_MACHINE_ID 0xFFFFEL
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#define LEN_MACHINE_ID 1L
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#define PS_386_MACHINE 0xF8 /* Machine ID byte for PS/2 model 80 */
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#define PC_AT_MACHINE 0xFC /* PC/AT, PC/XT286, PS/2 models 50/60 */
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#endif /* _BIOS_H */
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