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Memory Map

The following is a memory map that was generated based on the MAME source code (.180).  This information is only as accurate as the MAME driver is.  If you see any errors, please let me know what that error is.
 
The Memory Area is related to where the information is from (CPU, Sound Board, etc..), and it may also reflect what it has in common with other hardware.
Tazz-Mania (bootleg, 1982)
Memory Area:galaxold_map
Address RangeLengthFunctionDescription
0x0000-0x3FFF16384ROM
0x4000-0x47FF2048RAM
0x5000-0x53FF1024RAM Write, Sharedgalaxold_videoram_w, videoram
0x5400-0x57FF1024Readgalaxold_videoram_r
0x5800-0x583F64RAM Write, Sharedgalaxold_attributesram_w, attributesram
0x5840-0x585F32RAM, Sharedspriteram
0x5860-0x587F32RAM, Sharedbulletsram
0x5880-0x58FF128RAM
0x60001Read PortIN0
0x0001Coin 1Active High
0x0002Coin 2Active High
0x0004Joystick LeftActive High
0x0008Joystick RightActive High
0x0010Button 1Active High
0x0020Joystick DownActive High
0x0040Joystick DownActive High
0x0080Joystick UpActive High
0x6000-0x60012Writegalaxold_leds_w
0x60021Writegalaxold_coin_lockout_w
0x60031Writegalaxold_coin_counter_w
0x6004-0x60074Device Writecust, galaxian_sound_device, lfo_freq_w
0x68001Read PortIN1
0x0001Start 1 / P1 and P2 Button 2Active High
0x0002Start 2Active High
0x0004Joystick LeftActive High
0x0008Joystick RightActive High
0x0010Button 1Active High
0x0020Joystick UpActive High
0x0040OffActive High
0x0000OnActive High
0x00003Active High
0x00805Active High
0x6800-0x68023Device Writecust, galaxian_sound_device, background_enable_w
0x68031Device Writecust, galaxian_sound_device, noise_enable_w
0x68051Device Writecust, galaxian_sound_device, fire_enable_w
0x6806-0x68072Device Writecust, galaxian_sound_device, vol_w
0x70001Read PortIN2
0x70011Writegalaxold_nmi_enable_w
0x70041Writegalaxold_stars_enable_w
0x70061Writegalaxold_flip_screen_x_w
0x70071Writegalaxold_flip_screen_y_w
0x78001Device Writecust, galaxian_sound_device, pitch_w
0x7800-0x7FFF2048Device Readwatchdog, watchdog_timer_device, reset_r
0xFFFC-0xFFFF4RAM
Memory Area:tazzmang
Address RangeLengthFunctionDescription
0x0000-0x5FFF24576ROM
0x70001Read PortDSW0 (/* mirror */)
0x0000UprightActive High
0x0001CocktailActive High
0x0000A 4C/1C B 1C/4CActive High
0x0002A 3C/1C B 1C/3CActive High
0x0006A 2C/1C B 1C/2CActive High
0x00041C_1CActive High
0x00f0UnusedActive High
0x8000-0x87FF2048RAM
0x8800-0x883F64RAM Write, Sharedgalaxold_attributesram_w, attributesram
0x8840-0x885F32RAM, Sharedspriteram
0x8860-0x887F32RAM, Sharedbulletsram
0x8880-0x8BFF896Write NOP
0x9000-0x93FF1024RAM Write, Sharedgalaxold_videoram_w, videoram
0x98001Device Readwatchdog, watchdog_timer_device, reset_r
0xA0001Read PortIN0
0x0001Coin 1Active High
0x0002Coin 2Active High
0x0004Joystick LeftActive High
0x0008Joystick RightActive High
0x0010Button 1Active High
0x0020Joystick DownActive High
0x0040Joystick DownActive High
0x0080Joystick UpActive High
0xA7FF1Read PortIN0 (/* mirror */)
0x0001Coin 1Active High
0x0002Coin 2Active High
0x0004Joystick LeftActive High
0x0008Joystick RightActive High
0x0010Button 1Active High
0x0020Joystick DownActive High
0x0040Joystick DownActive High
0x0080Joystick UpActive High
0xA8001Read Port, Device WriteIN1, cust, galaxian_sound_device, background_enable_w
0x0001Start 1 / P1 and P2 Button 2Active High
0x0002Start 2Active High
0x0004Joystick LeftActive High
0x0008Joystick RightActive High
0x0010Button 1Active High
0x0020Joystick UpActive High
0x0040OffActive High
0x0000OnActive High
0x00003Active High
0x00805Active High
0xA8031Writegalaxold_coin_counter_w
0xA8051Device Writecust, galaxian_sound_device, fire_enable_w
0xA806-0xA8072Device Writecust, galaxian_sound_device, vol_w
0xB0001Read PortDSW0
0x0000UprightActive High
0x0001CocktailActive High
0x0000A 4C/1C B 1C/4CActive High
0x0002A 3C/1C B 1C/3CActive High
0x0006A 2C/1C B 1C/2CActive High
0x00041C_1CActive High
0x00f0UnusedActive High
0xB0011Writegalaxold_nmi_enable_w
0xB0041Writegalaxold_stars_enable_w
0xB0061Writegalaxold_flip_screen_x_w
0xB0071Writegalaxold_flip_screen_y_w
0xB8001Device Read, Device Writewatchdog, watchdog_timer_device, reset_r, cust, galaxian_sound_device, pitch_w
 

ROM Map for this game

 
This is the ROM map for the game.  This should tell you what address the ROM is at, how big it is, what it's used for.   
Memory Area:gfx1
Address RangeLengthLabel/LocationDescription
0x0000-0x07FF2048tazm8.1lkCRC(2c5b612b) (Fluke: 1330)
0x0000-0x07FF2048tazm8.1lkCRC(2c5b612b) (Fluke: 1330)
0x0800-0x0FFF2048tazzm7.1jhCRC(3f5ff3ac) (Fluke: ED7D)
0x0800-0x0FFF2048tazzm7.1jhCRC(3f5ff3ac) (Fluke: ED7D)
Memory Area:maincpu
Address RangeLengthLabel/LocationDescription
0x0000-0x0FFF4096tazzm1.4kCRC(a14480a1) (Fluke: 3E24)
0x1000-0x1FFF4096tazzm2.5jCRC(5609f5db) (Fluke: EB71)
0x2000-0x2FFF4096tazzm3.6fCRC(fe7f7002) (Fluke: 48CF)
0x3000-0x3FFF4096tazzm4.7eCRC(c9ca1d0a) (Fluke: D5C3)
0x4000-0x4FFF4096tazzm5.7lCRC(f50cd8a6) (Fluke: 2809)
0x5000-0x5FFF4096tazzm6.7lCRC(5cf2e7d2) (Fluke: 2259)
Memory Area:proms
Address RangeLengthLabel/LocationDescription
0x0000-0x001F32prom.6lCRC(6a0c7d87) (Fluke: 9DB9)
0x0000-0x001F32prom.6lCRC(6a0c7d87) (Fluke: 9DB9)
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