Retro/pcjs
Watch
1
0
Fork
You've already forked pcjs
 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

More protected-mode improvements

Browse source
This commit is contained in:
Jeff Parsons 2014-11-25 17:21:20 -08:00 • committed by jeffpar
commit 9523de773d
7 changed files with 197 additions and 115 deletions
Download patch file Download diff file Expand all files Collapse all files

19
modules/diskdump/lib/diskdump.js
View file

@ -222,12 +222,12 @@ DiskDump.aDefaultBPBs = [
],
[ // define BPB for 1.2Mb diskette
0xEB, 0xFE, 0x90, // 0x00: JMP instruction, following by 8-byte OEM signature
0x49, 0x42, 0x4d, 0x20, 0x31, 0x30, 0x2e, 0x31, // "IBM 10.0" (which I believe was used on IBM OS/2 1.0 diskettes)
0x49, 0x42, 0x4D, 0x20, 0x31, 0x30, 0x2E, 0x31, // "IBM 10.0" (which I believe was used on IBM OS/2 1.0 diskettes)
0x00, 0x02, // 0x0B: bytes per sector (0x200 or 512)
0x01, // 0x0D: sectors per cluster (1)
0x01, 0x00, // 0x0E: reserved sectors; ie, # sectors preceding the first FAT--usually just the boot sector (1)
0x02, // 0x10: FAT copies (2)
0xe0, 0x00, // 0x11: root directory entries (0xe0 or 224) 0xe0 * 0x20 = 0x1c00 (1 sector is 0x200 bytes, total of 14 sectors)
0xE0, 0x00, // 0x11: root directory entries (0xe0 or 224) 0xe0 * 0x20 = 0x1c00 (1 sector is 0x200 bytes, total of 14 sectors)
0x60, 0x09, // 0x13: number of sectors (0x960 or 2400)
0xF9, // 0x15: media type (0xF9 was used for 1228800-byte diskettes, and later for 737280-byte diskettes)
0x07, 0x00, // 0x16: sectors per FAT (7)
@ -235,6 +235,21 @@ DiskDump.aDefaultBPBs = [
0x02, 0x00, // 0x1A: number of heads (2)
0x00, 0x00, 0x00, 0x00 // 0x1C: number of hidden sectors (always 0 for non-partitioned media)
],
[ // define BPB for 1.44Mb diskette
0xEB, 0xFE, 0x90, // 0x00: JMP instruction, following by 8-byte OEM signature
0x4d, 0x53, 0x44, 0x4F, 0x53, 0x35, 0x2E, 0x30, // "MSDOS5.0" (an actual OEM signature, arbitrarily chosen for use here)
0x00, 0x02, // 0x0B: bytes per sector (0x200 or 512)
0x01, // 0x0D: sectors per cluster (1)
0x01, 0x00, // 0x0E: reserved sectors; ie, # sectors preceding the first FAT--usually just the boot sector (1)
0x02, // 0x10: FAT copies (2)
0xE0, 0x00, // 0x11: root directory entries (0xe0 or 224) 0xe0 * 0x20 = 0x1c00 (1 sector is 0x200 bytes, total of 14 sectors)
0x40, 0x0B, // 0x13: number of sectors (0xb40 or 2880)
0xF0, // 0x15: media type (0xF0 was used for 1474560-byte diskettes)
0x09, 0x00, // 0x16: sectors per FAT (9)
0x12, 0x00, // 0x18: sectors per track (18)
0x02, 0x00, // 0x1A: number of heads (2)
0x00, 0x00, 0x00, 0x00 // 0x1C: number of hidden sectors (always 0 for non-partitioned media)
],
[ // define BPB for 10Mb hard disk
0xEB, 0xFE, 0x90, // 0x00: JMP instruction, following by 8-byte OEM signature
0x49, 0x42, 0x4D, 0x20, 0x20, 0x32, 0x2E, 0x30, // "IBM 2.0" (this is a real OEM signature)