+---------------------------------------------------------------------------.
Title:          : CONVERTING BATTLEZONE TO RED BARON                        :
Version:        : 1.0                                                       :
Date:           : March 03, 2003                                            :
Author:         : Michael Kelley                                            :
+---------------------------------------------------------------------------+
                                                                            :
+------------.                                                              :
 Background   \                                                             :
+--------------`------------------------------------------------------------+
                                                                            :
What, you want to hack your working Battlezone boardset to play Red Baron?  :
Well then, follow along!                                                    :
                                                                            :
                                                                            :
+-----------.                                                               :
 Ingredients \                                                              :
+-------------`-------------------------------------------------------------+
                                                                            :
1 Battlezone AVG board (working)                                            :
1 Red Baron Aux 'Math Box' board (again, working)                           :
1 2532 EPROM                                                                :
8 2716 EPROMs                                                               :
1 Red Baron Program data                                                    :
                                                                            :
                                                                            :
+---------.                                                                 :
 The Hack! \                                                                :
+-----------`---------------------------------------------------------------+
                                                                            :
First, we will hack a 2532 EPROM for program rom H1. Since Battlezone uses  :
a 2716 at location H1 and Red Baron uses a 2532, we need at adapt! Connect  :
pin 18 to AB12, pin 19 to AB10, pin 20 to /ROM1 (chip select), which is L2  :
(74LS32) pin 8, and pin 21 to +5V. Install the Red Baron 2532 @ location H1.:
                                                                            :
Next, replace the game roms (2716s) A3, B/C3, E1, H1, J1, K1, L/M1, N1 with :
Red Baron 2716s.                                                            :
                                                                            :
Prom 36408 @ K7 stays the same as Battle Zone.                              :
                                                                            :
This is not too tough. In fact, I can't believe that the factory Red Baron  :
AVG's just did this instead of modifying the AVG to use jumpers to accept   :
the 2532 @ H1. The first time I saw a stock RB AVG (a long time ago), I     :
thought "Wow, look at the meatball surgery on this BZ AVG board! I wonder   :
if it works..."                                                             :
                                                                            :
HOWEVER, I can see no way to easily hack the Aux board of a Battle Zone to  :
work as a Red Baron Aux board. You've got about 7 extra chips plus the      :
novram. You would defiantely need a daughtercard to modify a Battle Zone    :
aux board for Red Baron.                                                    :
                                                                            :
                                                                            :
+-------.                                                                   :
 Pinouts \                                                                  :
+---------`-----------------------------------------------------------------+
                                                                            :
    +-----+--+-----+                                                        :
 A7 |1    +--+   24| VCC                                                    :
 A6 |2           23| A8                                                     :
 A5 |3           22| A9                                                     :
 A4 |4           21| VPP                                                    :
 A3 |5           20| /CS                                                    :
 A2 |6           19| A10                                                    :
 A1 |7    2716   18| PD/PGM                                                 :
 A0 |8           17| D8                                                     :
 D1 |9           16| D7                                                     :
 D2 |10          15| D6                                                     :
 D3 |11          14| D5                                                     :
GND |12          13| D4                                                     :
    +--------------+                                                        :
                                                                            :
                                                                            :
    +-----+--+-----+                                                        :
 A7 |1    +--+   24| VCC                                                    :
 A6 |2           23| A8                                                     :
 A5 |3           22| A9                                                     :
 A4 |4           21| A11                                                    :
 A3 |5           20| /OE VPP                                                :
 A2 |6    2732   19| A10                                                    :
 A1 |7           18| PD/PGM                                                 :
 A0 |8           17| D7                                                     :
 D0 |9           16| D6                                                     :
 D1 |10          15| D5                                                     :
 D2 |11          14| D4                                                     :
GND |12          13| D3                                                     :
    +--------------+                                                        :
                                                                            :
                                                                            :
    +-----+--+-----+                                                        :
 A7 |1    +--+   24| VCC                                                    :
 A6 |2           23| A8                                                     :
 A5 |3           22| A9                                                     :
 A4 |4           21| VPP                                                    :
 A3 |5           20| PD/PGM                                                 :
 A2 |6           19| A10                                                    :
 A1 |7    2532   18| A11                                                    :
 A0 |8           17| D8                                                     :
 D1 |9           16| D7                                                     :
 D2 |10          15| D6                                                     :
 D3 |11          14| D5                                                     :
GND |12          13| D4                                                     :
    +--------------+                                                        :
                                                                            :
                                                                            :
Voltages:                                                                   :
Vcc = 5 VDC, +/- 5%                                                         :
Vpp (Program pulse) = 25 VDC                                                :
Vss = 0 VDC (Ground)                                                        :
                                                                            :
Pinout:                                                                     :
PD/PGM = Power Down / Program                                               :
A0 - A11  = Address Inputs  (A0 = LSB, A11 = MSB)                           :
D0 - D7 = Data Outputs/Inputs (D0 = LSB, D7 = MSB)                          :
                                                                            :
+---------------------------------------------------------------------------.