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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.
Monte Carlo (Atari, 1979)
Memory Area:firetrk_map
Address RangeLengthFunctionDescription
0x0000-0x00FF256Mirror, RAM, Shared0x0700, , alpha_num_ram
0x0800-0x08FF256Mirror, RAM, Shared0x0700, , playfield_ram
0x10001Mirror, Write Only, Shared0x001f, , scroll_y
0x10201Mirror, Write Only, Shared0x001f, , scroll_x
0x10401Mirror, Write0x001f, crash_reset_w
0x10601Mirror, Write0x001f, firetrk_skid_reset_w
0x10801Mirror, Write Only, Shared0x001f, , car_rot
0x10A01Mirror, Write0x001f, steer_reset_w
0x10C01Mirror, Device Write0x001f, watchdog, watchdog_timer_device, reset_w
0x10E01Mirror, Write, Shared0x001f, blink_on_w, blink
0x14001Mirror, Write0x001f, firetrk_motor_snd_w
0x14201Mirror, Write0x001f, firetrk_crash_snd_w
0x14401Mirror, Write0x001f, firetrk_skid_snd_w
0x14601Mirror, Write Only, Shared0x001f, , drone_x
0x14801Mirror, Write Only, Shared0x001f, , drone_y
0x14A01Mirror, Write Only, Shared0x001f, , drone_rot
0x14C01Mirror, Write0x001f, firetrk_output_w
0x14E01Mirror, Write0x001f, firetrk_xtndply_w
0x1800-0x18078Mirror, Read, Write NOP0x03f8, firetrk_input_r,
0x1C00-0x1C034Mirror, Read0x03fc, firetrk_dip_r
0x2000-0x3FFF8192ROM
Memory Area:montecar_map
Address RangeLengthFunctionDescription
0x0000-0x00FF256Mirror, RAM, Shared0x0700, , alpha_num_ram
0x0800-0x08FF256Mirror, RAM, Shared0x0700, , playfield_ram
0x10001Mirror, Write Only, Shared0x001f, , scroll_y
0x10201Mirror, Write Only, Shared0x001f, , scroll_x
0x10401Mirror, Write0x001f, montecar_drone_reset_w
0x10601Mirror, Write0x001f, montecar_car_reset_w
0x10801Mirror, Write Only, Shared0x001f, , car_rot
0x10A01Mirror, Write0x001f, steer_reset_w
0x10C01Mirror, Device Write0x001f, watchdog, watchdog_timer_device, reset_w
0x10E01Mirror, Write0x001f, montecar_skid_reset_w
0x14001Mirror, Write0x001f, firetrk_motor_snd_w
0x14201Mirror, Write0x001f, firetrk_crash_snd_w
0x14401Mirror, Write0x001f, firetrk_skid_snd_w
0x14601Mirror, Write Only, Shared0x001f, , drone_x
0x14801Mirror, Write Only, Shared0x001f, , drone_y
0x14A01Mirror, Write Only, Shared0x001f, , drone_rot
0x14C01Mirror, Write0x001f, montecar_output_1_w
0x14E01Mirror, Write0x001f, montecar_output_2_w
0x1800-0x18078Mirror, Read, Write NOP0x03f8, montecar_input_r,
0x1C00-0x1C034Mirror, Read0x03fc, montecar_dip_r
0x2000-0x3FFF8192ROM
 

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
0x0000-0x03FF102435778-01.m4CRC(294ee08e) (Fluke: A1B4)
Memory Area:gfx2
Address RangeLengthLabel/LocationDescription
0x0000-0x07FF204835775-01.e6CRC(504106e9) (Fluke: FE3E)
Memory Area:gfx3
Address RangeLengthLabel/LocationDescription
0x0000-0x07FF204835779-01.m6CRC(4fbb3fe1) (Fluke: 0FF8)
Memory Area:gfx4
Address RangeLengthLabel/LocationDescription
0x0000-0x07FF204835780-01.b6CRC(9d0f1374) (Fluke: D85D)
Memory Area:maincpu
Address RangeLengthLabel/LocationDescription
0x2000-0x27FF204835766-01.h1CRC(d3695f09) (Fluke: 6ED8)
0x2800-0x2FFF204835765-01.f1CRC(9491a7ee) (Fluke: 9CC7)
0x3000-0x37FF204835764-01.d1CRC(899aaf4e) (Fluke: CA85)
0x3800-0x3FFF204835763-01.c1CRC(378bfe47) (Fluke: 1E14)
Memory Area:proms
Address RangeLengthLabel/LocationDescription
0x0000-0x01FF51235785-01.e7CRC(386c543a),color (Fluke: 44A9)
0x0200-0x02FF2569114.prmCRC(b8094b4c),sync (Fluke: 695B)
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