JPC should be 7b/8b not 76/86 (b and 6 look similar i suppose).
it doesn't matter much because parity is hardly ever checked
this way...  just happened to notice it when doing some other things.

Reference: /n/sources/patch/applied/8ljpc
Date: Fri Mar 18 11:58:41 CET 2005

--- /sys/src/cmd/8l/optab.c	Fri Mar 18 11:57:21 2005
+++ /sys/src/cmd/8l/optab.c	Fri Mar 18 11:57:17 2005
@@ -401,7 +401,7 @@
 	{ AJNE,		yjcond,	Px, 0x75,0x85 },
 	{ AJOC,		yjcond,	Px, 0x71,0x81,(00) },
 	{ AJOS,		yjcond,	Px, 0x70,0x80,(00) },
-	{ AJPC,		yjcond,	Px, 0x76,0x86 },
+	{ AJPC,		yjcond,	Px, 0x7b,0x8b },
 	{ AJPL,		yjcond,	Px, 0x79,0x89 },
 	{ AJPS,		yjcond,	Px, 0x7a,0x8a },
 	{ ALAHF,	ynone,	Px, 0x9f },