From c28c120384379ce09246ce3b05704140edab9785 Mon Sep 17 00:00:00 2001
From: Nick Bannon <nick@ucc.asn.au>
Date: Thu, 3 Jan 2002 12:31:48 +0000
Subject: [PATCH] Added Indirect X addressing instructions

---
 ROM/makeasm.pl | 51 +++++++++++++++++++++++++++++++++++++++++++++++---
 1 file changed, 48 insertions(+), 3 deletions(-)

diff --git a/ROM/makeasm.pl b/ROM/makeasm.pl
index 7bf28d4..c7b3064 100755
--- a/ROM/makeasm.pl
+++ b/ROM/makeasm.pl
@@ -48,7 +48,14 @@ my %twobytesecond = ( '18 38' => 'PULY',
 			'18 3A' => 'ABY',
 			'18 3C' => 'PSHY');
 
-my %onewitharg = ('63' => "COM\t\$%s,X",
+my %twobytesecondword = ( '18 FE' => 'LDY\t%s',
+			'18 FF' => 'STY\t%s');
+
+my %onewitharg = ('60' => "NEG\t\$%s,X",
+			'63' => "COM\t\$%s,X",
+			'64' => "LSR\t\$%s,X",
+			'67' => "ASR\t\$%s,X",
+			'68' => "ASL\t\$%s,X",
 			'6A' => "DEC\t\$%s,X",
 			'6C' => "INC\t\$%s,X",
 			'6D' => "TST\t\$%s,X",
@@ -62,8 +69,21 @@ my %onewitharg = ('63' => "COM\t\$%s,X",
 			'86' => "LDAA\t#\$%s",
 			'88' => "EORA\t#\$%s",
 			'8A' => "ORA\t#\$%s",
+			'A0' => "SUBA\t\$%s,X",
+			'A1' => "CMPA\t\$%s,X",
+			'A2' => "SBCA\t\$%s,X",
 			'A3' => "SUBD\t\$%s,X",
+			'A4' => "ANDA\t\$%s,X",
+			'A6' => "LDAA\t\$%s,X",
 			'A7' => "STA\t\$%s,X",
+			'A8' => "EORA\t\$%s,X",
+			'A9' => "ADCA\t\$%s,X",
+			'AA' => "ORAA\t\$%s,X",
+			'AB' => "ADDA\t\$%s,X",
+			'AC' => "CPX\t\$%s,X",
+			'AD' => "JSR\t\$%s,X",
+			'AE' => "LDS\t\$%s,X",
+			'AF' => "STS\t\$%s,X",
 			'C0' => "SUBB\t#\$%s",
 			'C1' => "CMPB\t#\$%s",
 			'C2' => "SBCB\t#\$%s",
@@ -72,9 +92,21 @@ my %onewitharg = ('63' => "COM\t\$%s,X",
 			'C6' => "LDAB\t#\$%s",
 			'C8' => "EORB\t#\$%s",
 			'CA' => "ORB\t#\$%s",
+			'E0' => "SUBB\t\$%s,X",
+			'E1' => "CMPB\t\$%s,X",
+			'E2' => "SBCB\t\$%s,X",
 			'E3' => "ADDD\t\$%s,X",
+			'E4' => "ANDB\t\$%s,X",
+			'E6' => "LDAB\t\$%s,X",
+			'E7' => "STAB\t\$%s,X",
+			'E8' => "EORB\t\$%s,X",
+			'E9' => "ADCB\t\$%s,X",
+			'EA' => "ORAB\t\$%s,X",
+			'EB' => "ADDB\t\$%s,X",
 			'EC' => "LDD\t\$%s,X",
-			'ED' => "STAD\t\$%s,X" );
+			'ED' => "STD\t\$%s,X",
+			'EE' => "LDX\t\$%s,X",
+			'EF' => "STX\t\$%s,X" );
 
 
 my %onewithword = (
@@ -157,7 +189,6 @@ LINE: while (<>) {
 # Usage: instruction line
 sub instruction {
     my ($line) = @_;
-    print ";$line";
 
     $instruction = substr($line,5,2);
 
@@ -176,6 +207,19 @@ sub instruction {
 		print "$1\n";
 		return;
 	}
+    
+	if (defined $twobytesecondword{$thing}) {
+    		$athing = substr($line,11,2);
+    		$athing2 = substr($line,14,2);
+		if (!($athing2 =~ /\s+/)) {
+    		 $curraddr = substr($line,0,4);
+		 printf "FOO%s\tEQU\t\$%s%s\n", $curraddr,$athing,$athing2;
+    		 printf "\t$twobytesecondword{$thing}", ">FOO$curraddr";
+		 $line =~ /$twobytesecondword{$thing} [0-9A-F][0-9A-F][0-9A-F][0-9A-F](.*)$/i;
+		 print "\t;$1\n";
+		return;
+		}
+    	}
     }
     
     if (defined $onewitharg{$instruction}) {
@@ -200,6 +244,7 @@ sub instruction {
 	}
     }
    
+    print ";$line";
     if ($line =~ /^([A-F0-9]{4}) ((([A-F0-9]{2}) )*[A-F0-9]{2})/) {
         @_=split(' ',$2);
         print "\tFCB\t\$".join(', $',@_)."\n";
-- 
2.20.1