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Oops. Remove some debugging code used to display a hexdump of the sector

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we just loaded from the disk.  The code to call it was commented out, and
it easily fit into the extra sector, but remove it anyway as it is
unneeded.
This commit is contained in:
John Baldwin 2000-07-17 19:39:50 +00:00
parent bda0fa93eb
commit f15da231c5
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=63328
1 changed files with 3 additions and 66 deletions
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69
sys/boot/i386/boot0/boot0.s
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@ -301,12 +301,6 @@ main.15: movw $LOAD,%bx # Address for read
jne main.10 # No
callw putn # Leave some space
jmp *%bx # Invoke bootstrap
/*
movw %bx,%si # Memory to dump
movw $SECTOR_SIZE/16,%dx # Lines to display
callw memdump # Dump memory
hang: jmp hang # Spin
*/
#
# Display routines
@ -485,66 +479,9 @@ os_netbsd: .ascii "NetBS"; .byte 'D'|0x80
os_bsdos: .ascii "BSD/O"; .byte 'S'|0x80
#
# A set of functions to print out various parts of %ax in hex
# Fake partition entry created at the end of the table used when loading
# boot0 at the very beginning and when loading an MBR from another disk when
# F5 is pressed.
#
hex16: callw hex16.1 # Do upper 8
hex16.1: xchgb %ah,%al # Save/restore
hex8: push %ax # Save
shrb $0x4,%al # Do upper
callw hex8.1 # 4
pop %ax # Restore
hex8.1: andb $0xf,%al # Get lower 4
cmpb $0xa,%al # Convert
sbbb $0x69,%al # to hex
das # digit
orb $0x20,%al # To lower case
push %ax # Save
callw putchr # Print char
pop %ax # Restore
retw # (Recursive)
#
# Function to display a hexdump of memory. Call with:
#
# %dx - word - number of lines to display, each line is 16 bytes
# %ds:(%si) - caddr_t - memory to display
#
memdump: movw %si,%ax # Display the
callw hex16 # memory offset
movb $':',%al # Output a seperator
callw putchr # between the
movb $' ',%al # offset and
callw putchr # the data
push %si # Save %si
movw $16,%cx # Bytes per line
memdump.1: lodsb # Get next byte
callw hex8 # and display it
movb $' ',%al # Determine which
cmpb $9,%cl # seperator
jne memdump.2 # to use
movb $'-',%al # and then
memdump.2: callw putchr # display it
loop memdump.1 # Next byte
movb $'|',%al # Start of character
callw putchr # display
pop %si # Restore %si
movb $16,%cl # Bytes per line
memdump.3: lodsb # Get next byte
cmpb $32,%al # Control character?
jb memdump.4 # Yes, so modify
cmpb $0x80,%al # Upper ASCII?
jb memdump.5 # No, use raw characer
memdump.4: movb $'.',%al # Use '.' instead of bad char
memdump.5: callw putchr # Output character
loop memdump.3 # Do whole line
movb $'|',%al # Start of character
callw putchr # display
push %si # Save %si
callw putn # New line
pop %si # Restore %si
dec %dx # Done yet?
jnz memdump # No, keep going
retw # Yes, return
.org SECTOR_SIZE*NUM_SECTORS, 0x0
fake: