Code cleanup, final fix for sprite lag problem.

[thunder] / doc / notes.txt

diff --git a/doc/notes.txt b/doc/notes.txt
old mode 100755 (executable)
new mode 100644 (file)
index 4829af2..04b808a
--- a/doc/notes.txt
+++ b/doc/notes.txt
@@ -28,7 +28,7 @@ Char matrix is 36x28 (Text mode)
 
 -> CMOS seems to be mapped to $5400 in RAM1...
 
-         TOP 5 
+         TOP 5
       SCORE  AREA  INI'T
 1ST   30000    5    ALB
 2ND   20000    4    LIR
@@ -57,7 +57,7 @@ $D803 is bank switch for CPU #2 (4 8K banks)
 $6000, 6200, 6400, 6600 are voice.  6200 & 6600 are sample # to play,
 6000 & 6400 are the strobe lines.
 
-PSG: 
+PSG:
 
 CPU #1's stack is mapped to $5FFF, #2 to $43FF
 
@@ -86,3 +86,41 @@ DIPSWITCH SETTINGS:
            10 undefined
            11 Type C(cocktail, flip)
 2-8: Continuation-off 6 games max, on 3 games max
+
+
+Date: Thu, 30 Jul 1998 18:45:51 -0500
+From: Lee Saito <ksaito@concentric.net>
+To: Jimmy Hamm <jlhamm@pacificnet.net>
+Subject: Re: Rolling Thunder clock freqs
+
+Jimmy Hamm wrote:
+
+> >> I need to know the clock frequency and IRQ frequency of both processors,
+> so
+> >> if you could look at the E and Q lines (pins 34 and 35 of the 6809s) and
+> the
+> >> IRQ lines (pin 3 of the 6809s) that would be great!
+> >
+
+OK.  I'm looking at the signals now...
+
+First, processor at 11A:
+
+pin 3 (IRQ line): Pulses vary in duration, making it somewhat difficult to
+determine frequency, but it's about 60 Hz (around 16 -17ms per pulse, 60Hz
+would be 16.6ms, I think)  This seems to be tied to the sound processor?
+(pulses get real short when no sounds are playing)
+
+pin 35: approx 650 ns/cycle  = 1.538 MHz
+
+pin 34: same as 35 (1.538 Mhz)
+
+Processor at 9A:
+
+Pin 3: Same as 11A (looks like 60Hz to me)
+
+Pin 35: Same as other processor (1.538 MHz)
+
+pin 34: Same as other processor (1.538 MHz)
+
+Hope this helps! ;)