Make use of BIOS int 0x13 extensions configurable, and disabled
by default.
This commit is contained in:
parent
842a95cc23
commit
548bf5dd17
@ -1,4 +1,4 @@
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# $Id: Makefile,v 1.7 1998/10/15 22:08:13 rnordier Exp $
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# $Id: Makefile,v 1.8 1998/10/20 20:20:48 rnordier Exp $
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PROG= boot2
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NOMAN=
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@ -11,6 +11,7 @@ CLEANFILES+= boot1 boot1.out boot1.o \
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M4?= m4
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B1INT13X?= 0
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B2SIOPRT?= 0x3f8
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B2SIOFMT?= 0x3
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B2SIODIV?= 0xc
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@ -41,7 +42,7 @@ boot1.out: boot1.o
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${LD} ${LDFLAGS} -e start -Ttext ${ORG1} -o ${.TARGET} boot1.o
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boot1.o: boot1.m4 boot1.s
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(cd ${.CURDIR}; ${M4} boot1.m4 boot1.s) | \
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(cd ${.CURDIR}; ${M4} -DFLAGS=${B1INT13X} boot1.m4 boot1.s) | \
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${AS} ${AFLAGS} -o ${.TARGET}
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boot2: boot2.ldr boot2.bin
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@ -13,7 +13,7 @@
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# purpose.
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#
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# $Id: boot1.s,v 1.2 1998/10/13 21:35:42 rnordier Exp $
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# $Id: boot1.s,v 1.3 1998/10/27 20:19:24 rnordier Exp $
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.set MEM_REL,0x600 # Relocation address
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.set MEM_ARG,0x800 # Arguments
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@ -156,7 +156,9 @@ return: ret # Generic return
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# Read from disk
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read: testb %dh,%dh # Try for extensions?
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read: tstbim(0x80,MEM_REL+flags-start)# Extensions enabled?
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jz read.3 # No
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testb %dh,%dh # Try for extensions?
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jz read.3 # No
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movwir(0x55aa,_bx) # Magic
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pushl %edx # Save
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@ -239,6 +241,8 @@ msg_read: .asciz "Read error"
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msg_part: .asciz "No bootable partition"
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msg_boot: .asciz "\r\nHit return to reboot: "
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flags: .byte FLAGS # Flags
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.org PRT_OFF,0x90
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# Partition table
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@ -13,7 +13,7 @@
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# purpose.
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#
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# $Id:$
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# $Id: boot1.m4,v 1.1.1.1 1998/10/12 21:16:26 rnordier Exp $
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define(_al,0x0)dnl
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define(_cl,0x1)dnl
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@ -60,3 +60,4 @@ define(movbi1,`.byte 0xc6; .byte 0x40 | $3; .byte $2; .byte $1')dnl
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define(callwi,`.byte 0xe8; .word $1 - . - 0x2')dnl
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define(jmpnwi,`.byte 0xe9; .word $1 - . - 0x2')dnl
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define(tstbi0,`.byte 0xf6; .byte $2; .byte $1')dnl
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define(tstbim,`.byte 0xf6; .byte 0x6; .word $2; .byte $1')dnl
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@ -13,7 +13,7 @@
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# purpose.
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#
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# $Id: boot1.s,v 1.2 1998/10/13 21:35:42 rnordier Exp $
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# $Id: boot1.s,v 1.3 1998/10/27 20:19:24 rnordier Exp $
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.set MEM_REL,0x600 # Relocation address
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.set MEM_ARG,0x800 # Arguments
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@ -156,7 +156,9 @@ return: ret # Generic return
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# Read from disk
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read: testb %dh,%dh # Try for extensions?
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read: tstbim(0x80,MEM_REL+flags-start)# Extensions enabled?
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jz read.3 # No
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testb %dh,%dh # Try for extensions?
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jz read.3 # No
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movwir(0x55aa,_bx) # Magic
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pushl %edx # Save
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@ -239,6 +241,8 @@ msg_read: .asciz "Read error"
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msg_part: .asciz "No bootable partition"
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msg_boot: .asciz "\r\nHit return to reboot: "
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flags: .byte FLAGS # Flags
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.org PRT_OFF,0x90
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# Partition table
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@ -1,4 +1,4 @@
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# $Id: Makefile,v 1.7 1998/10/15 22:08:13 rnordier Exp $
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# $Id: Makefile,v 1.8 1998/10/20 20:20:48 rnordier Exp $
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PROG= boot2
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NOMAN=
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@ -11,6 +11,7 @@ CLEANFILES+= boot1 boot1.out boot1.o \
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M4?= m4
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B1INT13X?= 0
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B2SIOPRT?= 0x3f8
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B2SIOFMT?= 0x3
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B2SIODIV?= 0xc
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@ -41,7 +42,7 @@ boot1.out: boot1.o
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${LD} ${LDFLAGS} -e start -Ttext ${ORG1} -o ${.TARGET} boot1.o
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boot1.o: boot1.m4 boot1.s
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(cd ${.CURDIR}; ${M4} boot1.m4 boot1.s) | \
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(cd ${.CURDIR}; ${M4} -DFLAGS=${B1INT13X} boot1.m4 boot1.s) | \
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${AS} ${AFLAGS} -o ${.TARGET}
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boot2: boot2.ldr boot2.bin
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