williams.c

这个是延伸mame的在wince平台下的游戏模拟器的代码

/***************************************************************************

Changes:
	Mar 12 98 LBO
	* Added Sinistar speech samples provided by Howie Cohen
	* Fixed clipping circuit with help from Sean Riddle and Pat Lawrence

	Mar 22 98 ASG
	* Fixed Sinistar head drawing, did another major cleanup
	* Rewrote the blitter routines
	* Fixed interrupt timing finally!!!

Do to:  Mystic Marathon
Not sure of the board: Turkey shoot, Joust 2

Note: the visible area (according to the service mode) seems to be
	{ 6, 297-1, 7, 246-1 },
however I use
	{ 6, 298-1, 7, 247-1 },
because the DOS port doesn't support well screen widths which are not multiple of 4.

------- Blaster Bubbles Joust Robotron Sinistar Splat Stargate -------------

0000-8FFF ROM   (for Blaster, 0000-3FFF is a bank of 12 ROMs)
0000-97FF Video  RAM Bank switched with ROM (96FF for Blaster)
9800-BFFF RAM
	0xBB00 Blaster only, Color 0 for each line (256 entry)
	0xBC00 Blaster only, Color 0 flags, latch color only if bit 0 = 1 (256 entry)
	    Do something else with the bit 1, I do not know what
C000-CFFF I/O
D000-FFFF ROM

c000-C00F color_registers  (16 bytes of BBGGGRRR)

c804 widget_pia_dataa (widget = I/O board)
c805 widget_pia_ctrla
c806 widget_pia_datab
c807 widget_pia_ctrlb (CB2 select between player 1 and player 2
		       controls if Table or Joust)
      bits 5-3 = 110 = player 2
      bits 5-3 = 111 = player 1

c80c rom_pia_dataa
c80d rom_pia_ctrla
c80e rom_pia_datab
      bit 0 \
      bit 1 |
      bit 2 |-6 bits to sound board
      bit 3 |
      bit 4 |
      bit 5 /
      bit 6 \
      bit 7 /Plus CA2 and CB2 = 4 bits to drive the LED 7 segment
c80f rom_pia_ctrlb

C900 rom_enable_scr_ctrl  Switch between video ram and rom at 0000-97FF

C940 Blaster only: Select bank in the color Prom for color remap
C980 Blaster only: Select which ROM is at 0000-3FFF
C9C0 Blaster only: bit 0 = enable the color 0 changing each lines
		   bit 1 = erase back each frame


***** Blitter ****** (Stargate and Defender do not have blitter)
CA00 start_blitter    Each bits has a function
      1000 0000 Do not process half the byte 4-7
      0100 0000 Do not process half the byte 0-3
      0010 0000 Shift the shape one pixel right (to display a shape on an odd pixel)
      0001 0000 Remap, if shape != 0 then pixel = mask
      0000 1000 Source  1 = take source 0 = take Mask only
      0000 0100 ?
      0000 0010 Transparent
      0000 0001
CA01 blitter_mask     Not really a mask, more a remap color, see Blitter
CA02 blitter_source   hi
CA03 blitter_source   lo
CA04 blitter_dest     hi
CA05 blitter_dest     lo
CA06 blitter_w_h      H  Do a XOR with 4 to have the real value (Except Splat)
CA07 blitter_w_h      W  Do a XOR with 4 to have the real value (Except Splat)

CB00 6 bits of the video counters bits 2-7

CBFF watchdog

CC00-CFFF 1K X 4 CMOS ram battery backed up (8 bits on Sinistar)




------------------ Robotron -------------------
c804 widget_pia_dataa (widget = I/O board)
  bit 0  Move Up
  bit 1  Move Down
  bit 2  Move Left
  bit 3  Move Right
  bit 4  1 Player
  bit 5  2 Players
  bit 6  Fire Up
  bit 7  Fire Down

c806 widget_pia_datab
  bit 0  Fire Left
  bit 1  Fire Right
  bit 2
  bit 3
  bit 4
  bit 5
  bit 6
  bit 7

c80c rom_pia_dataa
  bit 0  Auto Up
  bit 1  Advance
  bit 2  Right Coin
  bit 3  High Score Reset
  bit 4  Left Coin
  bit 5  Center Coin
  bit 6  Slam Door Tilt
  bit 7  Hand Shake from sound board


------------------ Joust -------------------
c804 widget_pia_dataa (widget = I/O board)
  bit 0  Move Left   player 1/2
  bit 1  Move Right  player 1/2
  bit 2  Flap        player 1/2
  bit 3
  bit 4  2 Player
  bit 5  1 Players
  bit 6
  bit 7

c806 widget_pia_datab
  bit 0
  bit 1
  bit 2
  bit 3
  bit 4
  bit 5
  bit 6
  bit 7

c80c rom_pia_dataa
  bit 0  Auto Up
  bit 1  Advance
  bit 2  Right Coin
  bit 3  High Score Reset
  bit 4  Left Coin
  bit 5  Center Coin
  bit 6  Slam Door Tilt
  bit 7  Hand Shake from sound board


------------------ Stargate -------------------
c804 widget_pia_dataa (widget = I/O board)
  bit 0  Fire
  bit 1  Thrust
  bit 2  Smart Bomb
  bit 3  HyperSpace
  bit 4  2 Players
  bit 5  1 Player
  bit 6  Reverse
  bit 7  Down

c806 widget_pia_datab
  bit 0  Up
  bit 1  Inviso
  bit 2
  bit 3
  bit 4
  bit 5
  bit 6
  bit 7  0 = Upright  1 = Table

c80c rom_pia_dataa
  bit 0  Auto Up
  bit 1  Advance
  bit 2  Right Coin        (High Score Reset in schematics)
  bit 3  High Score Reset  (Left Coin in schematics)
  bit 4  Left Coin         (Center Coin in schematics)
  bit 5  Center Coin       (Right Coin in schematics)
  bit 6  Slam Door Tilt
  bit 7  Hand Shake from sound board


------------------ Splat -------------------
c804 widget_pia_dataa (widget = I/O board)
  bit 0  Walk Up
  bit 1  Walk Down
  bit 2  Walk Left
  bit 3  Walk Right
  bit 4  1 Player
  bit 5  2 Players
  bit 6  Throw Up
  bit 7  Throw Down

c806 widget_pia_datab
  bit 0  Throw Left
  bit 1  Throw Right
  bit 2
  bit 3
  bit 4
  bit 5
  bit 6
  bit 7

c80c rom_pia_dataa
  bit 0  Auto Up
  bit 1  Advance
  bit 2  Right Coin
  bit 3  High Score Reset
  bit 4  Left Coin
  bit 5  Center Coin
  bit 6  Slam Door Tilt
  bit 7  Hand Shake from sound board


------------------ Blaster -------------------
c804 widget_pia_dataa (widget = I/O board)
  bit 0  up/down switch a
  bit 1  up/down switch b
  bit 2  up/down switch c
  bit 3  up/down direction
  bit 4  left/right switch a
  bit 5  left/right switch b
  bit 6  left/right switch c
  bit 7  left/right direction

c806 widget_pia_datab
  bit 0  Thrust (Panel)
  bit 1  Blast
  bit 2  Thrust (Joystick)
  bit 3
  bit 4  1 Player
  bit 5  2 Player
  bit 6
  bit 7

c80c rom_pia_dataa
  bit 0  Auto Up
  bit 1  Advance
  bit 2  Right Coin
  bit 3  High Score Reset
  bit 4  Left Coin
  bit 5  Center Coin
  bit 6  Slam Door Tilt
  bit 7  Hand Shake from sound board

------------------------- Sinistar -------------------------------------
c804 widget_pia_dataa (widget = I/O board)
  bit 0  up/down switch a
  bit 1  up/down switch b
  bit 2  up/down switch c
  bit 3  up/down direction
  bit 4  left/right switch a
  bit 5  left/right switch b
  bit 6  left/right switch c
  bit 7  left/right direction

c806 widget_pia_datab
  bit 0  Fire
  bit 1  Bomb
  bit 2
  bit 3
  bit 4  1 Player
  bit 5  2 Player
  bit 6
  bit 7

c80c rom_pia_dataa
  bit 0  Auto Up
  bit 1  Advance
  bit 2  Right Coin
  bit 3  High Score Reset
  bit 4  Left Coin
  bit 5  Center Coin
  bit 6  Slam Door Tilt
  bit 7  Hand Shake from sound board


------------------ Bubbles -------------------
c804 widget_pia_dataa (widget = I/O board)
  bit 0  Up
  bit 1  Down
  bit 2  Left
  bit 3  Right
  bit 4  2 Players
  bit 5  1 Player
  bit 6
  bit 7

c806 widget_pia_datab
  bit 0
  bit 1
  bit 2
  bit 3
  bit 4
  bit 5
  bit 6
  bit 7

c80c rom_pia_dataa
  bit 0  Auto Up
  bit 1  Advance
  bit 2  Right Coin        (High Score Reset in schematics)
  bit 3  High Score Reset  (Left Coin in schematics)
  bit 4  Left Coin         (Center Coin in schematics)
  bit 5  Center Coin       (Right Coin in schematics)
  bit 6  Slam Door Tilt
  bit 7  Hand Shake from sound board

------------------------- Defender -------------------------------------
0000-9800 Video RAM
C000-CFFF ROM (4 banks) + I/O
d000-ffff ROM

c000-c00f color_registers  (16 bytes of BBGGGRRR)

C3FC      WatchDog

C400-C4FF CMOS ram battery backed up

C800      6 bits of the video counters bits 2-7

cc00 pia1_dataa (widget = I/O board)
  bit 0  Auto Up
  bit 1  Advance
  bit 2  Right Coin
  bit 3  High Score Reset
  bit 4  Left Coin
  bit 5  Center Coin
  bit 6
  bit 7
cc01 pia1_ctrla

cc02 pia1_datab
  bit 0 \
  bit 1 |
  bit 2 |-6 bits to sound board
  bit 3 |
  bit 4 |
  bit 5 /
  bit 6 \
  bit 7 /Plus CA2 and CB2 = 4 bits to drive the LED 7 segment
cc03 pia1_ctrlb (CB2 select between player 1 and player 2 controls if Table)

cc04 pia2_dataa
  bit 0  Fire
  bit 1  Thrust
  bit 2  Smart Bomb
  bit 3  HyperSpace
  bit 4  2 Players
  bit 5  1 Player
  bit 6  Reverse
  bit 7  Down
cc05 pia2_ctrla

cc06 pia2_datab
  bit 0  Up
  bit 1
  bit 2
  bit 3
  bit 4
  bit 5
  bit 6
  bit 7
cc07 pia2_ctrlb
  Control the IRQ

d000 Select bank (c000-cfff)
  0 = I/O
  1 = BANK 1
  2 = BANK 2
  3 = BANK 3
  7 = BANK 4


***************************************************************************/

#include "driver.h"
#include "machine/6821pia.h"
#include "vidhrdw/generic.h"


/**** from machine/williams.h ****/
extern unsigned char *williams_bank_base;
extern unsigned char *williams_video_counter;