Coinop.org /// kdl

Disclaimer: This information is provided as is. There may be errors in this information. You may use this information only if you agree that Minimalist / Coinop.org, its employees, and noted authors will never be held responsible for any damage, injury, death, mayhem, etc. caused by errors in the information. When working with high voltage, never work alone and always follow safety precautions.
Document Title: [GauntletMap.html (html file)]
Gauntlet 68010 Memory Map

Function                           Address        R/W  DATA
-------------------------------------------------------------
Program ROM/Operating System       000000-00FFFF  R    D0-D15
Program ROM/SLAPSTIC               038000-03FFFF  R    D0-D15
Program ROM/Main                   040000-07FFFF  R    D0-D15
Spare RAM                          800000-801FFF  R/W  D0-D15

EEPROM                             802001-802FFF  R/W  D7-D0

Player 1 Input (See detail below)  803001         R    D0-D71
Player 2 Input                     803003         R    D0-D7
Player 3 Input                     803005         R    D0-D7
Player 4 Input                     803007         R    D0-D7

Player Inputs:
  Joystick Up                                          D7
  Joystick Down                                        D6
  Joystick Left                                        D5
  Joystick Right                                       D4
  Spare                                                D3
  Spare                                                D2
  Fire                                                 D1
  Magic/Start                                          D0

VBLANK (Active Low)                803009         R    D6
Outbut/Buffer Full (@803170)       803009         R    D5
 (Active High)
Input/Buffer Full (@80300F)        803009         R    D4
 (Active High)
Self-Test (Active Low)             803009         R    D3

Read Sound Processor (6502)        80300F         R    D0-D7

Watchdog (128 msec. timeout)       803100         W    xx

LED-1 (Low On)                     803121         W    D0
LED-2 (Low-On)                     803123         W    D0
LED-3 (Low On)                     803125         W    D0
LED-4 (Low On)                     803127         W    D0
Sound Processor Reset (Low Reset)  80312F         W    D0

VBlank Acknowledge                 803140         W    xx
Unlock EEPROM                      803150         W    xx
Write Sound Processor (6502)       803171         W    D0-D7

Playfield RAM                      900000-901FFF  R/W  D0-D15
Motion Object Picture              902000-9027FF  R/W  D0-D15
Motion Object Horizontal Position  902800-902FFF  R/W  D0-D15
Motion Object Vertical Position    903000-9037FF  R/W  D0-D15
Motion Object Link                 903800-903FFF  R/W  D0-D15
Spare RAM                          904000-904FFF  R/W  D0-D15
Alphanumerics RAM                  905000-905FFF  R/W  D0-D15

Playfield Vertical Scroll          905F6E,905F6F  R/W  D7-D15
Playfield ROM Bank Select          905F6F         R/W

Color RAM Alpha                    910000-9101FF  R/W  D0-D15
Color RAM Motion Object            910200-9103FF  R/W  D0-D15
Color RAM Playfield Shadow         910400-9104FF  R/W  D0-D15
Color RAM Playfield                910500-9105FF  R/W  D0-D15
Color RAM (Spare)                  910600-9107FF  R/W  D0-D15

Playfield Horizontal Scroll        930000,930001  W    D0-D8

NOTE: All addresses can be accessed in byte or word mode.


GAUNTLET 6502 MEMORY MAP

Function                                  Address     R/W  Data
---------------------------------------------------------------
Program RAM                               0000-0FFF   R/W  D0-D7
 
Write 68010 Port (Outbut Buffer)          1000        W    D0-D7
Read 68010 Port (Input Buffer)            1010        R    D0-D7

Audio Mix:
 Speech Mix                               1020        W    D5-D7
 Effects Mix                              1020        W    D3,D4
 Music Mix                                1020        W    D0-D2

Coin 1 (Left)                             1020        R    D3
Coin 2                                    1020        R    D2
Coin 3                                    1020        R    D1
Coin 4 (Right)                            1020        R    D0

Data Available (@ 1010) (Active High)     1030-1030   R    D7
Output Buffer Full (@1000) (Active High)  1030        R    D6
Speech Ready (Active Low)                 1030        R    D5
Self-Test (Active Low)                    1030        R    D4

Music Reset (Low Reset)                   1030        W    D7
Speech Write (Active Low)                 1031        W    D7
Speech Reset (Active Low)                 1032        W    D7
Speech Squeak (Low = 650KHz Clock)        1033        W    D7
Coin Counter Right (Active High)          1034        W    D7
Coin Counter Left (Active High)           1035        W    D7

Effects                                   1800-180F   R/W  D0-D7
Music                                     1810-1811   R/W  D0-D7
Speech                                    1820        W    D0-D7
Interrupt Acknowledge                     1830        R/W  xx

Program ROM (48K bytes)                   4000-FFFF   R    D0-D7