some clarifications

diff --git a/ROM-2003/vend.asm b/ROM-2003/vend.asm
index ee733c1..60c92ff 100644 (file)
--- a/ROM-2003/vend.asm
+++ b/ROM-2003/vend.asm
@@ -7942,7 +7942,7 @@ BDB4 39              9     rts
 
 jump78:
 ; start/finish sending a byte to the display
-; stack parameter - 0 to disable clock (finish), 1 to enable clock (start)
+; stack parameter - 0 to disable display clock (for reading keypad), 1 to enable
 ; lower 8-bits of D - byte to write to display.
 ; bytes with bit 7 unset are characters (0-127)
 ; bytes with bit 7 set are control commands.
@@ -8060,7 +8060,7 @@ BE6F BD E5 96        ...   jsr e596               ;jump115 - 100ms delay
 BE72 CE 10 00        ...   ldx #1000
 BE75 1C 00 80        ..    bset 00,x, #80
 
-; set clock polarity
+; set SPI enable
 BE78 CE 10 28        ...   ldx #1028
 BE7B 1C 00 40        ...   bset 00,x, #40
 
@@ -8080,7 +8080,7 @@ BE90 CC 00 E0        ...   ldd #00e0    ;11100000
 BE93 BD BD B5        ...   jsr bdb5            ;jump78
 BE96 38              8     pulx 
 
-; revert clock polarity
+; revert SPI enable
 BE97 CE 10 28        ..(   ldx #1028
 BE9A 1D 00 40        ...   bclr 00,x, #40
 BE9D 39              9     rts