Joker's Wild 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.

Joker's Wild (Sigma, 1988)

Memory Area:jokrwild_map

Address Range

Length

Function

Description

0x0000-0x03FF

1024

RAM Write, Shared

jokrwild_videoram_w, videoram

0x0400-0x07FF

1024

RAM

(//FIXME: backup RAM)

0x2000-0x23FF

1024

RAM Write, Shared

jokrwild_colorram_w, colorram

0x2400-0x27FF

1024

RAM

(//stack RAM)

0x4004-0x4007

Device Read/Write

pia0, pia6821_device, read, write

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
0x0001	0-1	Active Low
0x0002	0-2	Active Low
0x0004	0-3	Active Low
0x0008	0-4	Active Low
0x0010	0-5	Active Low
0x0020	0-6	Active Low
0x0040	0-7	Active Low
0x0080	0-8	Active Low

0x4008-0x400B

Device Read/Write

pia1, pia6821_device, read, write (//optical sensor is here)

0x0001	2-1	Active Low
0x0002	2-2	Active Low
0x0004	2-3	Active Low
0x0008	2-4	Active Low
0x0010	2-5	Active Low
0x0020	2-6	Active Low
0x0040	2-7	Active Low
0x0080	2-8	Active Low

0x6000

Device Write

crtc, mc6845_device, address_w

0x6001

Device Read/Write

crtc, mc6845_device, register_r, register_w

0x6100

Read Port

SW1

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

0x6200-0x6203

Read

rng_r (//another PIA?)

0x6300

Read Port

SW2

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

0x8000-0xFFFF

32768

ROM

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 Range	Length	Label/Location	Description
0x0000-0x07FF	2048	jwild.2h	CRC(aed38e00)
0x0800-0x0FFF	2048	jwild.2f	CRC(9c1e057c)
0x1000-0x17FF	2048	jwild.2g	CRC(d635f025)
0x1800-0x1FFF	2048	jwild.2e	CRC(a66ae0a1)
0x2000-0x27FF	2048	jwild.2d	CRC(76a0bcb4)
0x2800-0x2FFF	2048	jwild.2b	CRC(a264b0be)
0x3000-0x37FF	2048	jwild.2c	CRC(8d5e0b8f)
0x3800-0x3FFF	2048	jwild.2a	CRC(8084d0c2)

Memory Area:maincpu

Address Range	Length	Label/Location	Description
0x8000-0xBFFF	16384	jwild.7b	CRC(744cd029)
0xC000-0xFFFF	16384	jwild.7a	CRC(ca8e4f58)

Memory Area:proms

Address Range	Length	Label/Location	Description
0x0000-0x00FF	256	prom.x