Saturn 2 pinball by Bell Games 1985
(clone of Ballys Spy hunter)

26-Nov-2021
Version: 13
MPU board ROMs: U2 file CRC32# 422F190E (2532/2732 EPROM)
                U6 file CRC32# CAE795C1 (2532/2732 EPROM)
MEM EX-3 Expander J5 board file CRC32# 36C33047 (2764 EPROM)


ROM update is as follows:

01. Add Freeplay: enabled when maximum credits DIP switch settings are set to absolute maximum which is now '99' credits.
02. In switch test mode, cycle through showing *every* closed switch, not just the first closed switch found.
03. Restore functionality to the Activity 'S33' switch on the MPU board which Bell disabled.
04. Made the reaction time between quickly pressing the self test button a little more responsive.
05. Sped up the score threshold award setting counter in audit mode.
06. Show code version number '13' on the Ball in Play/Match display at power-up.
07. Added ability for the Activity 'S33' MPU board switch to zero the software settings in book-keeping/audits from #16 onwards.


Freeplay Mode:
Freeplay is enabled when MPU board DIP switches 25 and 26 are ON. Maximum Credits in freeplay is '99'.
When DIP switch 20 is OFF, credits are reset to zero at the start of a new game (Credit Reset mode).
When DIP switch 20 is ON,  credits are normally subtracted by 1 at the start of new games / addition of new players (Credit Count mode).
When credits are zero, the credit display is blanked out ('00' is never displayed). Players can still be added while credits are zero.
When credits are '01' or higher, the credits value will be displayed.
The credit indicator lamp will always indicate credits are available even when credits are zero (credit display blanked out).
If on power-up previous credits were zero, credits will be changed to '09'.



DSW26,DSW25         Maximum Credits
 Off   Off             05
 Off   On              10
 On    Off             20
 On    On              99  (enables Freeplay)



When freeplay is enabled via the Maximum Credits DIP switches, DIP switch 20 changes functionality:

DSW20               Freeplay mode (set credits to '09' on power-up if credits were zero)
 Off                   Credit Reset mode, Reset credits to zero at start of new game (credit display blanks out) 
 On                    Credit Count mode, Subtract 1 credit at start of new game / addition of new players


DSW19,DSW18,DSW17   Credits / Coin for chute #2 (center)
 Off   Off   Off       Same as coin chute #1 settings (refer to the games user manual)
 Off   Off   On        1 Credit  / 1 Coin
 Off   On    Off       2 Credits / 1 Coin
 Off   On    On        3 Credits / 1 Coin
 On    Off   Off       4 Credits / 1 Coin
 On    Off   On        5 Credits / 1 Coin
 On    On    Off       6 Credits / 1 Coin
 On    On    On        7 Credits / 1 Coin


When freeplay is disabled, DIP switch 20 returns to being part of coin chutes #2 Credits/Coin settings.
Refer to the games user manual.