btx/btx/btx.S

23 		.set MEM_BTX,0x1000		# Start of BTX memory
24 		.set MEM_ESP0,0x1800		# Supervisor stack
25 		.set MEM_BUF,0x1800		# Scratch buffer
26 		.set MEM_ESPR,0x5e00		# Real mode stack
27 		.set MEM_IDT,0x5e00		# IDT
28 		.set MEM_TSS,0x5f98		# TSS
29 		.set MEM_MAP,0x6000		# I/O bit map
30 		.set MEM_TSS_END,0x7fff		# End of TSS
31 		.set MEM_ORG,0x9000		# BTX code
32 		.set MEM_USR,0xa000		# Start of user memory
36 		.set PAG_SIZ,0x1000		# Page size
37 		.set PAG_CNT,0x1000		# Pages to map
41 		.set PSL_RESERVED_DEFAULT,0x00000002
42 		.set PSL_T,0x00000100		# Trap flag
43 		.set PSL_I,0x00000200		# Interrupt enable flag
44 		.set PSL_VM,0x00020000		# Virtual 8086 mode flag
45 		.set PSL_AC,0x00040000		# Alignment check flag
49 		.set SEL_SCODE,0x8		# Supervisor code
50 		.set SEL_SDATA,0x10		# Supervisor data
51 		.set SEL_RCODE,0x18		# Real mode code
52 		.set SEL_RDATA,0x20		# Real mode data
53 		.set SEL_UCODE,0x28|3		# User code
54 		.set SEL_UDATA,0x30|3		# User data
55 		.set SEL_TSS,0x38		# TSS
59 		.set TSS_ESP0,0x4		# PL 0 ESP
60 		.set TSS_SS0,0x8		# PL 0 SS
61 		.set TSS_MAP,0x66		# I/O bit map base
65 		.set SYS_EXIT,0x0		# Exit
66 		.set SYS_EXEC,0x1		# Exec
70 		.set V86_CTL,0x0		# Control flags
71 		.set V86_ADDR,0x4		# Int number/address
72 		.set V86_ES,0x8			# V86 ES
73 		.set V86_DS,0xc			# V86 DS
74 		.set V86_FS,0x10		# V86 FS
75 		.set V86_GS,0x14		# V86 GS
79 		.set V86F_ADDR,0x10000		# Segment:offset address
80 		.set V86F_CALLF,0x20000		# Emulate far call
81 		.set V86F_FLAGS,0x40000		# Return flags
85 		.set DMP_X16,0x1		# Word
86 		.set DMP_X32,0x2		# Long
87 		.set DMP_MEM,0x4		# Memory
88 		.set DMP_EOL,0x8		# End of line
92 		.set SCR_MAT,0xe1		# Mode/attribute
93 		.set SCR_COL,0x50		# Columns per row
94 		.set SCR_ROW,0x19		# Rows per screen
98 		.set BDA_MEM,0x501		# Free memory
99 		.set BDA_POS,0x53e		# Cursor position
103 		.set _ESP0H,MEM_ESP0>>0x8	# Byte 1 of ESP0
104 		.set _TSSIO,MEM_MAP-MEM_TSS	# TSS I/O base
105 		.set _TSSLM,MEM_TSS_END-MEM_TSS	# TSS limit
106 		.set _IDTLM,MEM_TSS-MEM_IDT-1	# IDT limit
167 		xchg %ax,%bx			#  set
177 		loop init.2			# Till set done
215 		push $0x202			# Set flags (IF set)
410 		testl $PSL_T,0x10(%esp,1)	# Trap flag set?
559  * Panic if V86F_CALLF isn't set with V86F_ADDR.
665  * Now we are back in protected mode.  The kernel stack frame set up
838 		.set SIO_PRT,SIOPRT		# Base port
839 		.set SIO_FMT,SIOFMT		# 8N1
840 		.set SIO_DIV,(115200/SIOSPD)	# 115200 / SPD