diff --git a/runtime/syntax/asmh8300.vim b/runtime/syntax/asmh8300.vim
index 8560fb7..2eabb7e 100644
--- a/runtime/syntax/asmh8300.vim
+++ b/runtime/syntax/asmh8300.vim
@@ -1,19 +1,21 @@
 " Vim syntax file
-" Language:	Hitachi H-8300h specific syntax for GNU Assembler
-" Maintainer:	Kevin Dahlhausen <kdahlhaus@yahoo.com>
-" Last Change:	2002 Sep 19
+" Language:		Hitachi H-8300h specific syntax for GNU Assembler
+" Maintainer:		Doug Kearns <dougkearns@gmail.com>
+" Previous Maintainer:	Kevin Dahlhausen <kdahlhaus@yahoo.com>
+" Last Change:		2020 Oct 31
 
-" quit when a syntax file was already loaded
 if exists("b:current_syntax")
   finish
 endif
 
+runtime! syntax/asm.vim
+
 syn case ignore
 
-syn match asmDirective "\.h8300[h]*"
+syn match asmDirective	"\.h8300[hs]n\="
 
 "h8300[h] registers
-syn match asmReg	"e\=r[0-7][lh]\="
+syn match asmRegister	"e\=r\o[lh]\="
 
 "h8300[h] opcodes - order is important!
 syn match asmOpcode "add\.[lbw]"
@@ -37,32 +39,20 @@
 syn match asmOpcode "shl[lr]\.[lbw]"
 syn match asmOpcode "sub\.[lbw]"
 syn match asmOpcode "xor\.[lbw]"
-syn keyword asmOpcode "andc" "band" "bcc" "bclr" "bcs" "beq" "bf" "bge" "bgt"
-syn keyword asmOpcode "bhi" "bhs" "biand" "bild" "bior" "bist" "bixor" "bmi"
-syn keyword asmOpcode "bne" "bnot" "bnp" "bor" "bpl" "bpt" "bra" "brn" "bset"
-syn keyword asmOpcode "bsr" "btst" "bst" "bt" "bvc" "bvs" "bxor" "cmp" "daa"
-syn keyword asmOpcode "das" "eepmov" "eepmovw" "inc" "jmp" "jsr" "ldc" "movfpe"
-syn keyword asmOpcode "movtpe" "mov" "nop" "orc" "rte" "rts" "sleep" "stc"
-syn keyword asmOpcode "sub" "trapa" "xorc"
+
+syn keyword asmOpcode andc band bcc bclr bcs beq bf bge bgt
+syn keyword asmOpcode bhi bhs biand bild bior bist bixor bmi
+syn keyword asmOpcode bne bnot bnp bor bpl bpt bra brn bset
+syn keyword asmOpcode bsr btst bst bt bvc bvs bxor cmp daa
+syn keyword asmOpcode das eepmov eepmovw inc jmp jsr ldc movfpe
+syn keyword asmOpcode movtpe mov nop orc rte rts sleep stc
+syn keyword asmOpcode sub trapa xorc
 
 syn case match
 
-
-" Read the general asm syntax
-runtime! syntax/asm.vim
-
-
-" Define the default highlighting.
-" Only when an item doesn't have highlighting yet
-
-hi def link asmOpcode  Statement
-hi def link asmRegister  Identifier
-
-" My default-color overrides:
-"hi asmOpcode ctermfg=yellow
-"hi asmReg	ctermfg=lightmagenta
-
+hi def link asmOpcode	Statement
+hi def link asmRegister	Identifier
 
 let b:current_syntax = "asmh8300"
 
-" vim: ts=8
+" vim: nowrap sw=2 sts=2 ts=8 noet