From 053aedcf95f620db00f3fb91cc320699e3f2667a Mon Sep 17 00:00:00 2001
From: Phil Budne <phil@ultimate.com>
Date: Sat, 19 Mar 2016 00:51:07 -0400
Subject: [PATCH] s7.s: fix sna/sma confusion that caused hangs in display PI
 code

---
 src/sys/s7.s | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/sys/s7.s b/src/sys/s7.s
index 236c288..cb2e5b2 100644
--- a/src/sys/s7.s
+++ b/src/sys/s7.s
@@ -78,7 +78,7 @@ cnop:			" fetched as constant in iread
 
 		"** BEGIN CROSSED OUT
 1: lds				" load display status (see 03-scope.pdf pg 25)
-   sma ral			" edges flag??
+   sma ral			" display trap set? (and rotate left)
    jmp 1f			"  not set
    cdf				" clear display flags
    lac .dspb
@@ -99,11 +99,11 @@ dsprestart:
    dac .dsptm			" set .dsptm = -10 (10 ticks)
    jmp piret
 
-1: sna ral			" dataphone flag set (bit 7)??
+1: sma ral			" edges flag set?? (and rotate)
    jmp .+3			"  no
    raef				" "resume after edges flag"
    jmp piret			" return
-   sma				" light pen flags (bit 2)
+   sma				" light pen flag?
    jmp 1f			"  no
    lda				" G-2: load display address
    dac .lpba			" save