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https://github.com/holub/mame
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Updated some notes and cosmetic clean-up.
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RobertoFresca
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@ -2,94 +2,75 @@
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// copyright-holders:Roberto Fresca
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/******************************************************************************
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JOKER'S WILD - SIGMA
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--------------------
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Preliminary driver by Roberto Fresca.
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Games running on this hardware:
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* Joker's Wild (encrypted). 1988, Sigma.
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JOKER'S WILD - SIGMA (1988)
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Preliminary driver by Roberto Fresca.
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*******************************************************************************
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Hardware Notes (guessed):
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------------------------
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Hardware Notes (guessed):
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------------------------
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CPU: 1x M6809
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Video: 1x M6845 CRTC or similar.
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I/O: 2x PIAs ?? (there is code to initialize PIAs at $8033)
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CPU: 1x M6809
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Video: 1x M6845 CRTC or similar.
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I/O: 2x PIAs ?? (there is code to initialize PIAs at $8033)
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*******************************************************************************
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*** Game Notes ***
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*** Game Notes ***
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Game is trying to boot, and after approx. 90 seconds an error message appear
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on screen: "Random number generator is defective", then stuck here.
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See code at $9859
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PIAs are commented out just to see the R/W on error log.
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RND old notes:
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Game is trying to boot, and after approx. 90 seconds an error message appear
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on screen: "Random number generator is defective", then stuck here.
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See code at $9859
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Currently the game spit an error about bad RAM, and after approx 90 seconds
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the playfield is drawn and then hang.
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*******************************************************************************
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--------------------
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*** Memory Map ***
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--------------------
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--------------------
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*** Memory Map ***
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--------------------
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0x0000 - 0x07FF ; Video RAM.
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0x2000 - 0x27FF ; Color RAM.
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0x4004 - 0x4007 ; PIA?.
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0x4008 - 0x400B ; PIA?.
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0x6000 - 0x6001 ; M6845 CRTC.
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0x8000 - 0xFFFF ; ROM space.
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0x0000 - 0x07FF ; Video RAM.
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0x2000 - 0x27FF ; Color RAM.
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0x4004 - 0x4007 ; PIA?.
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0x4008 - 0x400B ; PIA?.
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0x6000 - 0x6001 ; M6845 CRTC.
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0x8000 - 0xFFFF ; ROM space.
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*** MC6545 Initialization ***
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----------------------------------------------------------------------------------------------------------------------
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register: R00 R01 R02 R03 R04 R05 R06 R07 R08 R09 R10 R11 R12 R13 R14 R15 R16 R17
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----------------------------------------------------------------------------------------------------------------------
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value: 0x20 0x18 0x1B 0x64 0x20 0x07 0x1A 0x1D 0x00 0x07 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00.
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*** MC6545 Initialization ***
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----------------------------------------------------------------------------------------------------------------------
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register: R00 R01 R02 R03 R04 R05 R06 R07 R08 R09 R10 R11 R12 R13 R14 R15 R16 R17
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----------------------------------------------------------------------------------------------------------------------
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value: 0x20 0x18 0x1B 0x64 0x20 0x07 0x1A 0x1D 0x00 0x07 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00.
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*******************************************************************************
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DRIVER UPDATES:
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DRIVER UPDATES:
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[2008-10-30]
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- Fixed graphics to 2 bits per pixel.
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[2008-10-25]
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- Initial release.
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- ROMs load OK.
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- Proper ROMs decryption.
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- Added MC6845 CRTC.
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- Video RAM OK.
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- Added technical notes.
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[2008-10-30]
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- Fixed graphics to 2 bits per pixel.
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[2008-10-25]
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- Initial release.
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- ROMs load OK.
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- Proper ROMs decryption.
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- Added MC6845 CRTC.
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- Video RAM OK.
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- Added technical notes.
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TODO:
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- RND number generator.
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- Inputs
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- Sound.
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- A lot of work.
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TODO:
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- RND number generator.
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- Inputs
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- Sound.
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- A lot of work.
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*******************************************************************************/
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#define MASTER_CLOCK XTAL_8MHz /* guess */
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#include "emu.h"
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@ -131,21 +112,18 @@ public:
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* Video Hardware *
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*************************/
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WRITE8_MEMBER(jokrwild_state::jokrwild_videoram_w)
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{
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m_videoram[offset] = data;
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m_bg_tilemap->mark_tile_dirty(offset);
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}
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WRITE8_MEMBER(jokrwild_state::jokrwild_colorram_w)
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{
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m_colorram[offset] = data;
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m_bg_tilemap->mark_tile_dirty(offset);
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}
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TILE_GET_INFO_MEMBER(jokrwild_state::get_bg_tile_info)
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{
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/* - bits -
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@ -160,31 +138,23 @@ TILE_GET_INFO_MEMBER(jokrwild_state::get_bg_tile_info)
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SET_TILE_INFO_MEMBER(0, code , color , 0);
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}
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void jokrwild_state::video_start()
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{
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m_bg_tilemap = &machine().tilemap().create(m_gfxdecode, tilemap_get_info_delegate(FUNC(jokrwild_state::get_bg_tile_info),this), TILEMAP_SCAN_ROWS, 8, 8, 24, 26);
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}
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UINT32 jokrwild_state::screen_update_jokrwild(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
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{
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m_bg_tilemap->draw(screen, bitmap, cliprect, 0, 0);
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return 0;
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}
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PALETTE_INIT_MEMBER(jokrwild_state, jokrwild)
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{
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//missing proms
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}
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/*************************
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* Machine Init *
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*************************/
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/*****************************
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* Read/Write Handlers *
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*****************************/
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@ -200,6 +170,7 @@ READ8_MEMBER(jokrwild_state::rng_r)
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return machine().rand() & 0xff;
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}
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/*************************
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* Memory Map Information *
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*************************/
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@ -220,7 +191,6 @@ static ADDRESS_MAP_START( jokrwild_map, AS_PROGRAM, 8, jokrwild_state )
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AM_RANGE(0x8000, 0xffff) AM_ROM
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ADDRESS_MAP_END
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/* I/O byte R/W
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@ -238,6 +208,7 @@ ADDRESS_MAP_END
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*/
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/*************************
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* Input Ports *
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*************************/
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@ -425,6 +396,7 @@ WRITE8_MEMBER(jokrwild_state::testb_w)
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// printf("%02x B\n",data);
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}
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/*************************
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* Machine Drivers *
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*************************/
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@ -452,8 +424,8 @@ static MACHINE_CONFIG_START( jokrwild, jokrwild_state )
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MCFG_SCREEN_ADD("screen", RASTER)
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MCFG_SCREEN_REFRESH_RATE(60)
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MCFG_SCREEN_VBLANK_TIME(ATTOSECONDS_IN_USEC(0))
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MCFG_SCREEN_SIZE((32+1)*8, (32+1)*8) /* From MC6845, registers 00 & 04. (value-1) */
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MCFG_SCREEN_VISIBLE_AREA(0*8, 24*8-1, 0*8, 26*8-1) /* From MC6845, registers 01 & 06 */
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MCFG_SCREEN_SIZE((32+1)*8, (32+1)*8) // From MC6845, registers 00 & 04. (value-1)
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MCFG_SCREEN_VISIBLE_AREA(0*8, 24*8-1, 0*8, 26*8-1) // From MC6845, registers 01 & 06.
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MCFG_SCREEN_UPDATE_DRIVER(jokrwild_state, screen_update_jokrwild)
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MCFG_SCREEN_PALETTE("palette")
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@ -504,17 +476,16 @@ ROM_END
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DRIVER_INIT_MEMBER(jokrwild_state,jokrwild)
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/*****************************************************************************
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Encryption was made by pages of 256 bytes.
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Encryption was made by pages of 256 bytes.
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For each page, the value is XORed with a fixed value (0xCC),
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then XORed again with the offset of the original value inside its own page.
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For each page, the value is XORed with a fixed value (0xCC),
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then XORed again with the offset of the original value inside its own page.
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Example:
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Example:
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For encrypted value at offset 0x123A (0x89)...
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0x89 XOR 0xCC XOR 0x3A = 0x7F
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For encrypted value at offset 0x123A (0x89)...
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0x89 XOR 0xCC XOR 0x3A = 0x7F
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*****************************************************************************/
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{
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@ -533,5 +504,5 @@ DRIVER_INIT_MEMBER(jokrwild_state,jokrwild)
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* Game Drivers *
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*************************/
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/* YEAR NAME PARENT MACHINE INPUT INIT ROT COMPANY FULLNAME FLAGS */
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/* YEAR NAME PARENT MACHINE INPUT STATE INIT ROT COMPANY FULLNAME FLAGS */
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GAME( 1988, jokrwild, 0, jokrwild, jokrwild, jokrwild_state, jokrwild, ROT0, "Sigma", "Joker's Wild (encrypted)", GAME_NO_SOUND | GAME_NOT_WORKING )
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