Revert the 5.2.4 version of boot1a.s to that of the former 5.0.8.

This should make things work like before.  Update the desc. for
compressed images lzrom -> zrom.

net/etherboot/files/patch-ad

@@ -0,0 +1,32 @@
+--- arch/i386/prefix/boot1a.s	Wed Jun 30 14:16:27 2004
++++ /usr/home/ambrisko/boot1a.s	Thu Jul  1 10:18:17 2004
+@@ -1,7 +1,3 @@
+-# This code is no longer used in Etherboot.  It is not maintained and
+-# may not work.
+-
+-
+ #
+ # Copyright (c) 1998 Robert Nordier
+ # All rights reserved.
+@@ -183,7 +179,10 @@ main.5:		mov %dx,MEM_ARG			# Save args
+ 		movb $0x2,%dh			# Sector count
+ 		mov $0x7e00, %bx
+ 		callw nreadbx			# Read disk
+-		movb $0x40,%dh			# Sector count
++		cmpw $0xaa55, 0x7e00+0x200	# rom signature ?
++		jnz booterror
++		movb 0x7e00+0x202,%dh		# Sector count
++		incb %dh
+ 		movb %dh, %al
+ 		callw puthex
+ 		mov $0x7e00, %bx
+@@ -192,8 +191,7 @@ main.5:		mov %dx,MEM_ARG			# Save args
+ 		mov $msg_r1,%si
+ 		callw putstr
+ 		pop %si
+-		lcall $0x800,$0			# enter the rom code
+-		int $0x19
++		ljmp $0x800,$6			# enter the rom code
+ 
+ msg_r1:		.asciz " done\r\n"
+ 		

net/etherboot/pkg-descr

@@ -8,7 +8,7 @@ The defaults used here are suited to boot FreeBSD ELF kernels over NFS.
 To produce an etherboot floppy (or HD partition) do
 
 	cd work/etherboot/src 
-	cat bin/boot1a.bin bin/<device>.lzrom > /dev/fd0
+	cat bin/boot1a.bin bin/<device>.zrom > /dev/fd0
 
 Replace <device> with the specific code for your card, and /dev/fd0
 with your hard disk partition.