Search

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.
Cosmic Chasm (Cinematronics / GCE, 1983)
Memory Area:memmap
Address RangeLengthFunctionDescription
0x0000-0xFFFF65536ROM
0x40000-0x4000F16Device Read/Write 8-bit6840ptm, ptm6840_device, read, write, 0xff
0x50000-0x500012Writerefresh_control_w
0x60000-0x600012Read Port, WriteDSW, led_w
0x00013Active High
0x00005Active High
0x000640000Active High
0x000460000Active High
0x000280000Active High
0x0000100000Active High
0x0000EasyActive High
0x0008HardActive High
0x0000OnceActive High
0x0010EveryActive High
0x0020OffActive High
0x0000OnActive High
0x00002C_1CActive High
0x00401C_1CActive High
0x70000-0x700012Device Writewatchdog, watchdog_timer_device, reset16_w
0xF80000-0xF800FF256Read/Writeio_r,io_w
0xFFB000-0xFFFFFF20480RAM, Sharedram
Memory Area:sound_memmap
Address RangeLengthFunctionDescription
0x0000-0x0FFF4096ROM
0x4000-0x43FF1024RAM
0x5000-0x53FF1024RAM
0x60001Mirror, Read0xf9e, coin_sound_r
0x6000-0x60012Mirror, Device Write0xf9e, ay1, ay8910_device, address_data_w
0x60011Mirror, Device Read0xf9e, ay1, ay8910_device, data_r
0x6020-0x60212Mirror, Device Write0xf9e, ay2, ay8910_device, address_data_w
0x60211Mirror, Device Read0xf9e, ay2, ay8910_device, data_r
0x60401Mirror, Device Read, Device Write0xf9e, soundlatch, generic_latch_8_device, read, soundlatch3, generic_latch_8_device, write
0x60411Mirror, Read/Write0xf9e, soundlatch2_r, soundlatch4_w
0x60611Mirror, Write0xf9e, reset_coin_flag_w
0x70411Read/Write NOP(// TODO)
Memory Area:sound_portmap
Address RangeLengthFunctionDescription
0x0000-0x00034Device Read/Writectc, z80ctc_device, read, write
 

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
0x0000-0x0FFF40962732.binCRC(715adc4a) (Fluke: DB83)
0x0000-0x0FFF40962732.binCRC(715adc4a) (Fluke: DB83)
Memory Area:plds
Address RangeLengthLabel/LocationDescription
0x0000-0x003352pal12l6.u76CRC(a30e02b7) (Fluke: 1048)
0x0100-0x013352pal12l6.u77CRC(458b9cdb) (Fluke: 5D2D)
© Copyright 2009-2025, ClassicSoft, LLC. All rights reserved
Powered by the ClassicSoft Web Content Framework V3