f14fb60209
* Updating common/lib * Updating lib/csu * Updating lib/libc * Updating libexec/ld.elf_so * Corrected test on __minix in featuretest to actually follow the meaning of the comment. * Cleaned up _REENTRANT-related defintions. * Disabled -D_REENTRANT for libfetch * Removing some unneeded __NBSD_LIBC defines and tests Change-Id: Ic1394baef74d11b9f86b312f5ff4bbc3cbf72ce2
151 lines
2.9 KiB
ArmAsm
151 lines
2.9 KiB
ArmAsm
/* $NetBSD: conio.S,v 1.7 2011/06/16 13:27:59 joerg Exp $ */
|
|
|
|
/* PC console handling
|
|
originally from: FreeBSD:sys/i386/boot/netboot/start2.S
|
|
*/
|
|
|
|
#include <machine/asm.h>
|
|
|
|
.text
|
|
|
|
/**************************************************************************
|
|
CLR - Clear screen
|
|
**************************************************************************/
|
|
ENTRY(conclr)
|
|
pusha
|
|
|
|
call _C_LABEL(prot_to_real) # enter real mode
|
|
.code16
|
|
|
|
/* Clear screen. */
|
|
movw $0x0600, %ax
|
|
movw $0x0700, %bx
|
|
xorw %cx, %cx
|
|
movw $0x184f, %dx /* 80x25 */
|
|
int $0x10
|
|
|
|
/* Home cursor. */
|
|
movb $0x02, %ah
|
|
xorw %bx, %bx
|
|
xorw %dx, %dx
|
|
int $0x10
|
|
|
|
calll _C_LABEL(real_to_prot) # back to protected mode
|
|
.code32
|
|
|
|
popa
|
|
ret
|
|
|
|
/**************************************************************************
|
|
PUTC - Print a character
|
|
**************************************************************************/
|
|
ENTRY(conputc)
|
|
pusha
|
|
|
|
call _C_LABEL(prot_to_real) # enter real mode
|
|
.code16
|
|
|
|
#if defined(__minix)
|
|
cmp $0x08, %al # backspace?
|
|
jne print_char
|
|
|
|
# Multiline backspace support.
|
|
push %ax
|
|
movb $0x3, %ah # get cursor position
|
|
xorw %bx, %bx
|
|
int $0x10
|
|
pop %ax
|
|
testb %dl, %dl # cursor on first column?
|
|
jnz print_char
|
|
testb %dh, %dh # cursor not on first row?
|
|
jz print_char
|
|
decb %dh # move up one row
|
|
movb $0x4f, %dl # move to last column
|
|
xorw %bx, %bx
|
|
movb $0x02, %ah # set cursor position
|
|
jmp do_int
|
|
|
|
print_char:
|
|
#endif /* defined(__minix) */
|
|
movw $1,%bx
|
|
movb $0x0e,%ah
|
|
movb %al, %cl
|
|
#if defined(__minix)
|
|
do_int:
|
|
#endif /* defined(__minix) */
|
|
int $0x10
|
|
|
|
calll _C_LABEL(real_to_prot) # back to protected mode
|
|
.code32
|
|
|
|
popa
|
|
ret
|
|
|
|
/**************************************************************************
|
|
GETC - Get a character
|
|
**************************************************************************/
|
|
ENTRY(congetc)
|
|
xorl %eax, %eax
|
|
pusha
|
|
|
|
call _C_LABEL(prot_to_real) # enter real mode
|
|
.code16
|
|
|
|
movb $0x0,%ah
|
|
int $0x16
|
|
movb %al,%bl
|
|
|
|
calll _C_LABEL(real_to_prot) # back to protected mode
|
|
.code32
|
|
|
|
movb %bl, 28(%esp)
|
|
|
|
popa
|
|
ret
|
|
|
|
/**************************************************************************
|
|
ISSHIFT - Check for keyboard interrupt; via shift key
|
|
**************************************************************************/
|
|
ENTRY(conisshift)
|
|
xorl %eax, %eax
|
|
pusha
|
|
|
|
call _C_LABEL(prot_to_real) # enter real mode
|
|
.code16
|
|
|
|
xor %bx,%bx
|
|
movb $0x2,%ah
|
|
int $0x16
|
|
testb $3,%al
|
|
setnz %bl
|
|
|
|
calll _C_LABEL(real_to_prot) # back to protected mode
|
|
.code32
|
|
|
|
movb %bl, 28(%esp)
|
|
|
|
popa
|
|
ret
|
|
|
|
/**************************************************************************
|
|
ISKEY - Check for keyboard input
|
|
**************************************************************************/
|
|
ENTRY(coniskey)
|
|
xorl %eax, %eax
|
|
pusha
|
|
|
|
call _C_LABEL(prot_to_real) # enter real mode
|
|
.code16
|
|
|
|
xor %bx,%bx
|
|
movb $0x1,%ah
|
|
int $0x16
|
|
setnz %bl
|
|
|
|
calll _C_LABEL(real_to_prot) # back to protected mode
|
|
.code32
|
|
|
|
movb %bl, 28(%esp)
|
|
|
|
popa
|
|
ret
|