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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.
Frogger (Konami (Sega license), 1981)
Memory Area:frogger_map
Address RangeLengthFunctionDescription
0x0000-0x3FFF16384ROM
0x8000-0x87FF2048RAM
0x88001Mirror, Device Read0x07ff, watchdog, watchdog_timer_device, reset_r
0xA800-0xABFF1024Mirror, RAM Write, Shared0x0400, galaxian_videoram_w, videoram
0xB000-0xB0FF256Mirror, RAM Write, Shared0x0700, galaxian_objram_w, spriteram
0xB8081Mirror, Write0x07e3, irq_enable_w
0xB80C1Mirror, Write0x07e3, galaxian_flip_screen_y_w
0xB8101Mirror, Write0x07e3, galaxian_flip_screen_x_w
0xB8181Mirror, Write0x07e3, coin_count_0_w (/* IOPC7 */)
0xB81C1Mirror, Write0x07e3, coin_count_1_w (/* POUT1 */)
0xC000-0xFFFF16384Read/Writefrogger_ppi8255_r, frogger_ppi8255_w
Memory Area:galaxian_map_base
Address RangeLengthFunctionDescription
0x0000-0x3FFF16384ROM
0x4000-0x43FF1024Mirror, RAM0x0400,
0x5000-0x53FF1024Mirror, RAM Write, Shared0x0400, galaxian_videoram_w, videoram
0x5800-0x58FF256Mirror, RAM Write, Shared0x0700, galaxian_objram_w, spriteram
0x60001Mirror, Read Port0x07ff, IN0
0x6000-0x60012Mirror, Write0x07f8, start_lamp_w
0x60021Mirror, Write0x07f8, coin_lock_w
0x60031Mirror, Write0x07f8, coin_count_0_w
0x68001Mirror, Read Port0x07ff, IN1
0x70001Mirror, Read Port0x07ff, IN2
0x70011Mirror, Write0x07f8, irq_enable_w
0x70041Mirror, Write0x07f8, galaxian_stars_enable_w
0x70061Mirror, Write0x07f8, galaxian_flip_screen_x_w
0x70071Mirror, Write0x07f8, galaxian_flip_screen_y_w
0x78001Mirror, Device Read0x07ff, watchdog, watchdog_timer_device, reset_r
 

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:audiocpu
Address RangeLengthLabel/LocationDescription
0x0000-0x07FF2048epr-608.ic32CRC(e8ab0256) (Fluke: 6552)
0x0000-0x07FF2048epr-608.ic32CRC(e8ab0256) (Fluke: 6552)
0x0000-0x07FF2048epr-608.ic32CRC(e8ab0256) (Fluke: 6552)
0x0800-0x0FFF2048epr-609.ic33CRC(7380a48f) (Fluke: BAF8)
0x0800-0x0FFF2048epr-609.ic33CRC(7380a48f) (Fluke: BAF8)
0x0800-0x0FFF2048epr-609.ic33CRC(7380a48f) (Fluke: BAF8)
0x1000-0x17FF2048epr-610.ic34CRC(31d7eb27) (Fluke: D5F7)
0x1000-0x17FF2048epr-610.ic34CRC(31d7eb27) (Fluke: D5F7)
0x1000-0x17FF2048epr-610.ic34CRC(31d7eb27) (Fluke: D5F7)
Memory Area:gfx1
Address RangeLengthLabel/LocationDescription
0x0000-0x07FF2048epr-607.ic101CRC(05f7d883) (Fluke: 4CEB)
0x0000-0x07FF2048epr-607.ic101CRC(05f7d883) (Fluke: 4CEB)
0x0000-0x07FF2048epr-607.ic101CRC(05f7d883) (Fluke: 4CEB)
0x0800-0x0FFF2048epr-606.ic102CRC(f524ee30) (Fluke: 2A8F)
0x0800-0x0FFF2048epr-606.ic102CRC(f524ee30) (Fluke: 2A8F)
0x0800-0x0FFF2048epr-606.ic102CRC(f524ee30) (Fluke: 2A8F)
Memory Area:maincpu
Address RangeLengthLabel/LocationDescription
0x0000-0x0FFF4096frogger.26CRC(597696d6),We need the correct Sega "EPR" labels for these 3 (Fluke: 6500)
0x1000-0x1FFF4096frogger.27CRC(b6e6fcc3) (Fluke: ADF5)
0x2000-0x2FFF4096frogger.34CRC(ed866bab) (Fluke: 52DA)
Memory Area:proms
Address RangeLengthLabel/LocationDescription
0x0000-0x001F32pr-91.6lCRC(413703bf) (Fluke: 93DB)
0x0000-0x001F32pr-91.6lCRC(413703bf) (Fluke: 93DB)
0x0000-0x001F32pr-91.6lCRC(413703bf) (Fluke: 93DB)
0x0000-0x001F32pr-91.6lCRC(413703bf) (Fluke: 93DB)
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