X-Git-Url: http://git.mutantstargoat.com/user/nuclear/?a=blobdiff_plain;f=boot%2Fboot.asm;h=96506de177878426b08c7da880baebfe4cde1719;hb=de48157cb811c927d7a2af1be1ed15b162a320a2;hp=2b74db8265dd34740ed1795d4ada85145d570aeb;hpb=be7535b3af9d7ecc5581a7b3d325f5caec87b24f;p=eightysix

diff --git a/boot/boot.asm b/boot/boot.asm
index 2b74db8..96506de 100644
--- a/boot/boot.asm
+++ b/boot/boot.asm
@@ -27,21 +27,29 @@ cur_cyl		equ 7b14h	; 2 bytes - current cylinder
 %%end:	popf
 %endmacro
 
+; 5.25" 360K floppy
+BPB_DISK_SECTORS	equ 720
+BPB_TRACK_SECTORS	equ 9
+BPB_MEDIA_TYPE		equ 0fdh
+; 3.5" 1.44M floppy
+;BPB_DISK_SECTORS	equ 2880
+;BPB_TRACK_SECTORS	equ 18
+;BPB_MEDIA_TYPE		equ 0f0h
 
 bios_param_block:
 	jmp start	; 2 bytes
 	nop		; 1 byte
 	; start of BPB at offset 3
-	db "BSPL 0.1"	; 03h: OEM ident, 8 bytes
+	db "86BOOT00"	; 03h: OEM ident, 8 bytes
 	dw 512		; 0bh: bytes per sector
 	db 1		; 0dh: sectors per cluster
 	dw 1		; 0eh: reserved sectors (including boot record)
 	db 2		; 10h: number of FATs
 	dw 224		; 11h: number of dir entries
-	dw 2880		; 13h: number of sectors in volume
-	db 0fh		; 15h: media descriptor type (f = 3.5" HD floppy)
+	dw BPB_DISK_SECTORS	; 13h: number of sectors in volume
+	db BPB_MEDIA_TYPE	; 15h: media descriptor type (f0 = 3.5" HD floppy)
 	dw 9		; 16h: number of sectors per FAT
-	dw 18		; 18h: number of sectors per track
+	dw BPB_TRACK_SECTORS	; 18h: number of sectors per track
 	dw 2		; 1ah: number of heads
 	dd 0		; 1ch: number of hidden sectors
 	dd 0		; 20h: high bits of sector count