X-Git-Url: http://git.mutantstargoat.com/user/nuclear/?a=blobdiff_plain;f=src%2Fboot%2Fboot.s;h=50817a3f6799e94e0b56625dabace56f90fd0592;hb=559dd7c3c836a69eac46bd12c7ef61bb5de8882c;hp=554f5a2f2ca0b9e522a8d74ca274efe4ddde24f6;hpb=c3e1be53f1269385b7f2b64442b85747e20b2412;p=bootcensus

diff --git a/src/boot/boot.s b/src/boot/boot.s
index 554f5a2..50817a3 100644
--- a/src/boot/boot.s
+++ b/src/boot/boot.s
@@ -15,7 +15,7 @@
 # along with this program.  If not, see <https://www.gnu.org/licenses/>.
 
 	.code16
-	.section .boot,"a"
+	.section .boot,"ax"
 
 	.set stack_top, 0x7be0
 	.set read_retries, 0x7be8
@@ -65,15 +65,16 @@ boot:
 	call read_sectors
 	jmp boot2_addr
 
-	.set ARG_NSECT, 6
-	.set ARG_SIDX, 4
-
 loading_msg: .asciz "\nLoad "
 driveno_msg: .asciz "Drv:"
 
+	.global sect_per_track
 sect_per_track: .short 18
+	.global num_cylinders
 num_cylinders: .short 80
+	.global num_heads
 num_heads: .short 2
+	.global heads_mask
 heads_mask: .byte 1
 
 get_drive_chs:
@@ -88,10 +89,10 @@ get_drive_chs:
 
 	mov $8, %ah
 	int $0x13
-	jnc .Lok
+	jnc ok
 	ret
 
-.Lok:	xor %eax, %eax
+ok:	xor %eax, %eax
 	mov %ch, %al
 	mov %cl, %ah
 	rol $2, %ah
@@ -118,6 +119,10 @@ get_drive_chs:
 	call print_num
 	ret
 
+
+	.set ARG_NSECT, 6
+	.set ARG_SIDX, 4
+
 # read_sectors(first, num)
 read_sectors:
 	push %bp
@@ -147,7 +152,7 @@ read_sector:
 
 	movw $3, read_retries
 
-.Lread_try:
+read_try:
 	# calculate the track (sidx / sectors_per_track)
 	mov 4(%bp), %ax
 
@@ -179,22 +184,22 @@ read_sector:
 	mov $0x0201, %ax
 	movb drive_number, %dl
 	int $0x13
-	jnc .Lread_ok
+	jnc read_ok
 
 	# abort after 3 attempts
 	decw read_retries
-	jz .Lread_fail
+	jz read_fail
 
 	# error detected, reset controller and retry
 	xor %ah, %ah
 	int $0x13
-	jmp .Lread_try
+	jmp read_try
 
-.Lread_fail:
+read_fail:
 	mov 4(%bp), %ax
 	jmp abort_read
 
-.Lread_ok:
+read_ok:
 	mov $46, %ax
 	call print_char
 
@@ -227,12 +232,12 @@ print_str:
 
 0:	mov (%si), %al
 	cmp $0, %al
-	jz .Lend
+	jz end
 	call print_char
 	inc %si
 	jmp 0b
 
-.Lend:	popa
+end:	popa
 	ret
 
 	# expects character in al
@@ -267,14 +272,14 @@ print_num:
 	movw $scratchbuf + scratchbuf_size, %si
 	movb $0, (%si)
 	mov $10, %ebx
-.Lconvloop:
+convloop:
 	xor %edx, %edx
 	div %ebx
 	add $48, %dl
 	dec %si
 	mov %dl, (%si)
 	cmp $0, %eax
-	jnz .Lconvloop
+	jnz convloop
 
 	call print_str
 
@@ -335,9 +340,9 @@ ser_putchar:
 0:	mov %al, %ah
 	# wait until the transmit register is empty
 	mov $UART_LSTAT, %dx
-.Lwait:	in %dx, %al
+wait:	in %dx, %al
 	and $LST_TREG_EMPTY, %al
-	jz .Lwait
+	jz wait
 	mov $UART_DATA, %dx
 	mov %ah, %al
 	out %al, %dx