Quarter Horse Memory Map

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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.

Quarter Horse (Electro-Sport, 1983)

Memory Area:io_map

Address Range

Length

Function

Description

0x0001

Device Read

aysnd, ay8910_device, data_r

0x0002-0x0003

Device Write

aysnd, ay8910_device, data_address_w

0x0020-0x0021

Device Read/Write

i8275, i8275_device, read, write

0x0040

Write NOP

(// unknown)

0x0060

Write

output1_w

0x0080

Write

output2_w

0x00C0

Read Port

DSW1

0x0001	Off	Active High
0x0000	On	Active High
0x0002	Off	Active High
0x0000	On	Active High
0x0004	Off	Active High
0x0000	On	Active High
0x0008	Off	Active High
0x0000	On	Active High
0x0010	Off	Active High
0x0000	On	Active High
0x0020	Off	Active High
0x0000	On	Active High
0x0040	Off	Active High
0x0000	On	Active High
0x0080	Off	Active High
0x0000	On	Active High

0x00C1

Read Port

DSW2

0x0001	Off	Active High
0x0000	On	Active High
0x0002	Off	Active High
0x0000	On	Active High
0x0004	Off	Active High
0x0000	On	Active High
0x0008	Off	Active High
0x0000	On	Active High
0x0010	Off	Active High
0x0000	On	Active High
0x0020	Off	Active High
0x0000	On	Active High
0x0040	Off	Active High
0x0000	On	Active High
0x0080	Off	Active High
0x0000	On	Active High

Memory Area:mem_map

Address Range	Length	Function	Description
0x0000-0x3FFF	16384	ROM
0x4000-0x4FFF	4096	Read/Write	dwarfd_ram_r, dwarfd_ram_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:ld_data

Address Range	Length	Label/Location	Description
0x0000-0x07FF	2048	-g_l-.bin	CRC(05c09fa6)
0x0000-0x07FF	2048	-g_l-.bin	CRC(05c09fa6)

Memory Area:maincpu

Address Range	Length	Label/Location	Description
0x0000-0x0FFF	4096	9l_qh_60-2402_7193.bin	CRC(6a097741)
0x1000-0x1FFF	4096	9k_qh_60-2401_8193.bin	CRC(d958078c)
0x2000-0x2FFF	4096	9j_qh_60-2400_9193.bin	CRC(90efa26e)
0x3000-0x3FFF	4096	9h_qh_80-2399_10193.bin	CRC(20be3f2f)

Memory Area:proms

Address Range	Length	Label/Location	Description
0x0000-0x001F	32	3a_bprom.bin	CRC(d4febd88)
0x0000-0x001F	32	3a_bprom.bin	CRC(d4febd88)
0x0020-0x003F	32	7h_bprom.bin	CRC(c9618de2)
0x0020-0x003F	32	7h_bprom.bin	CRC(c9618de2)