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r17551 Wednesday 29th August, 2012 at 02:16:46 UTC by Angelo Salese
Preliminary implementation of the Fujitsu MB90092 OSD chip, used by Super Famicom Box [Angelo Salese]
[src/emu]emu.mak
[src/emu/video]m50458.c mb90092.c* mb90092.h*
[src/mame/drivers]sfcbox.c

trunk/src/mame/drivers/sfcbox.c
r17550r17551
117117#include "cpu/spc700/spc700.h"
118118#include "cpu/g65816/g65816.h"
119119#include "cpu/z180/z180.h"
120#include "video/mb90092.h"
120121#include "includes/snes.h"
121122#include "audio/snes_snd.h"
123#include "rendlay.h"
122124
123125class sfcbox_state : public snes_state
124126{
125127public:
126128   sfcbox_state(const machine_config &mconfig, device_type type, const char *tag)
127129      : snes_state(mconfig, type, tag),
128      m_bios(*this, "bios")
130      m_bios(*this, "bios"),
131      m_mb90092(*this,"mb90092")
129132      { }
130133
131134   required_device <cpu_device> m_bios;
135   required_device <mb90092_device> m_mb90092;
132136
133   DECLARE_WRITE8_MEMBER(tx_w);
137   UINT32 screen_update(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect);
134138};
135139
140UINT32 sfcbox_state::screen_update( screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect )
141{
142   m_mb90092->screen_update(screen,bitmap,cliprect);
143   return 0;
144}
136145
137146static ADDRESS_MAP_START( snes_map, AS_PROGRAM, 8, sfcbox_state )
138147   AM_RANGE(0x000000, 0x2fffff) AM_READWRITE_LEGACY(snes_r_bank1, snes_w_bank1)   /* I/O and ROM (repeats for each bank) */
r17550r17551
171180ADDRESS_MAP_END
172181
173182
174WRITE8_MEMBER( sfcbox_state::tx_w )
175{
176   printf("%02x\n",data);
177}
178183
179184static ADDRESS_MAP_START( sfcbox_io, AS_IO, 8, sfcbox_state )
180   AM_RANGE(0x0b, 0x0b) AM_WRITE(tx_w)
185   AM_RANGE(0x0b, 0x0b) AM_DEVWRITE("mb90092",mb90092_device,write)
181186   AM_RANGE(0x00, 0x3f) AM_RAM // internal i/o
182187//   AM_RANGE(0x80, 0x80) // Keyswitch and Button Inputs / SNES Transfer and Misc Output
183188//   AM_RANGE(0x81, 0x81) // SNES Transfer and Misc Input / Misc Output
r17550r17551
343348   MCFG_CPU_PROGRAM_MAP(sfcbox_map)
344349   MCFG_CPU_IO_MAP(sfcbox_io)
345350
351   MCFG_MB90092_ADD("mb90092",XTAL_12MHz / 2) /* TODO: pixel clock */
352
353   /* TODO: the screen should actually superimpose, but for the time being let's just separate outputs for now */
354   MCFG_DEFAULT_LAYOUT(layout_dualhsxs)
355
356   MCFG_SCREEN_ADD("osd", RASTER)
357   MCFG_SCREEN_REFRESH_RATE(60)
358   MCFG_SCREEN_VBLANK_TIME(ATTOSECONDS_IN_USEC(2500))
359//   MCFG_SCREEN_SIZE(24*12+22, 12*18+22)
360//   MCFG_SCREEN_VISIBLE_AREA(0*8, 24*12-1, 0*8, 12*18-1)
361   MCFG_SCREEN_SIZE(24*16+22, 12*16+22)
362   MCFG_SCREEN_VISIBLE_AREA(0*8, 24*16-1, 0*8, 12*16-1)
363   MCFG_SCREEN_UPDATE_DRIVER(sfcbox_state,screen_update)
346364MACHINE_CONFIG_END
347365
348366/***************************************************************************
trunk/src/emu/video/mb90092.c
r0r17551
1/***************************************************************************
2
3   Fujitsu MB90092 OSD
4
5   preliminary device by Angelo Salese
6
7   TODO:
8   - get a real charset ROM;
9
10***************************************************************************/
11
12#include "emu.h"
13#include "video/mb90092.h"
14
15
16
17//**************************************************************************
18//  GLOBAL VARIABLES
19//**************************************************************************
20
21// device type definition
22const device_type MB90092 = &device_creator<mb90092_device>;
23
24static ADDRESS_MAP_START( mb90092_vram, AS_0, 16, mb90092_device )
25   AM_RANGE(0x0000, 0x023f) AM_RAM // vram
26ADDRESS_MAP_END
27
28/* charset is undumped, but apparently a normal ASCII one is enough for the time being (for example "fnt0808.x1" in Sharp X1) */
29ROM_START( mb90092 )
30   ROM_REGION( 0x0800, "mb90092", 0 )
31   ROM_LOAD("mb90092_char.bin",     0x0000, 0x0800, NO_DUMP )
32ROM_END
33
34//-------------------------------------------------
35//  rom_region - device-specific ROM region
36//-------------------------------------------------
37
38const rom_entry *mb90092_device::device_rom_region() const
39{
40   return ROM_NAME( mb90092 );
41}
42
43//-------------------------------------------------
44//  memory_space_config - return a description of
45//  any address spaces owned by this device
46//-------------------------------------------------
47
48const address_space_config *mb90092_device::memory_space_config(address_spacenum spacenum) const
49{
50   return (spacenum == AS_0) ? &m_space_config : NULL;
51}
52
53//**************************************************************************
54//  INLINE HELPERS
55//**************************************************************************
56
57//-------------------------------------------------
58//  readbyte - read a byte at the given address
59//-------------------------------------------------
60
61inline UINT16 mb90092_device::read_word(offs_t address)
62{
63   return space()->read_word(address << 1);
64}
65
66//-------------------------------------------------
67//  writebyte - write a byte at the given address
68//-------------------------------------------------
69
70inline void mb90092_device::write_word(offs_t address, UINT16 data)
71{
72   space()->write_word(address << 1, data);
73}
74
75//**************************************************************************
76//  LIVE DEVICE
77//**************************************************************************
78
79//-------------------------------------------------
80//  mb90092_device - constructor
81//-------------------------------------------------
82
83mb90092_device::mb90092_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock)
84   : device_t(mconfig, MB90092, "mb90092", tag, owner, clock),
85     device_memory_interface(mconfig, *this),
86     m_space_config("videoram", ENDIANNESS_LITTLE, 16, 16, 0, NULL, *ADDRESS_MAP_NAME(mb90092_vram))
87{
88   m_shortname = "mb90092";
89
90}
91
92
93//-------------------------------------------------
94//  device_validity_check - perform validity checks
95//  on this device
96//-------------------------------------------------
97
98void mb90092_device::device_validity_check(validity_checker &valid) const
99{
100}
101
102
103//-------------------------------------------------
104//  device_start - device-specific startup
105//-------------------------------------------------
106
107void mb90092_device::device_start()
108{
109
110}
111
112
113//-------------------------------------------------
114//  device_reset - device-specific reset
115//-------------------------------------------------
116
117void mb90092_device::device_reset()
118{
119   int i;
120   m_cmd_ff = 0;
121
122   for(i=0;i<0x120;i++)
123      write_word(i,0x00ff);
124}
125
126
127//**************************************************************************
128//  READ/WRITE HANDLERS
129//**************************************************************************
130
131WRITE8_MEMBER( mb90092_device::write )
132{
133   UINT16 dat;
134
135   switch(m_cmd_ff)
136   {
137      case OSD_COMMAND:
138         m_cmd = data & 0xf8;
139         m_cmd_param = data & 7;
140         //printf("cmd %02x\n",data);
141         break;
142      case OSD_DATA:
143         dat = ((m_cmd_param & 7)<<7) | (data & 0x7f);
144         switch(m_cmd)
145         {
146            case 0x80: // preset VRAM address
147               m_osd_addr = dat;
148               //printf("%04x %d %d\n",m_osd_addr,(m_osd_addr & 0x1f),(m_osd_addr & 0x1e0) >> 5);
149               break;
150            case 0x90: // write Character
151               int x,y;
152               x = (m_osd_addr & 0x1f);
153               y = (m_osd_addr & 0x1e0) >> 5;
154               //printf("%d %d\n",x,y);
155               write_word(x+y*24,dat);
156
157               /* handle address increments */
158               x = ((x + 1) % 24);
159               if(x == 0)
160                  y = ((y + 1) % 12);
161               m_osd_addr = x + (y << 5);
162
163               break;
164
165         }
166         break;
167   }
168
169   m_cmd_ff ^= 1;
170}
171
172UINT32 mb90092_device::screen_update(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect)
173{
174   int x,y;
175   UINT8 *pcg = memregion("mb90092")->base();
176   UINT16 tile;
177
178   for(y=0;y<12;y++)
179   {
180      for(x=0;x<24;x++)
181      {
182         int xi,yi;
183
184         tile = read_word(x+y*24);
185
186         /* TODO: charset hook-up is obviously WRONG so following mustn't be trusted at all */
187         for(yi=0;yi<16;yi++)
188         {
189            for(xi=0;xi<16;xi++)
190            {
191               UINT8 pix;
192               UINT32 pen;
193
194               pix = (pcg[(tile*8)+(yi >> 1)] >> (7-(xi >> 1))) & 1;
195
196               pen = pix ? 0xffffff : 0;
197               if(tile == 0xff)
198                  pen = 0;
199
200               bitmap.pix32(y*16+yi,x*16+xi) = pen;
201            }
202         }
203      }
204   }
205
206   return 0;
207}
trunk/src/emu/video/mb90092.h
r0r17551
1/***************************************************************************
2
3Template for skeleton device
4
5***************************************************************************/
6
7#pragma once
8
9#ifndef __MB90092DEV_H__
10#define __MB90092DEV_H__
11
12
13
14//**************************************************************************
15//  INTERFACE CONFIGURATION MACROS
16//**************************************************************************
17
18#define MCFG_MB90092_ADD(_tag,_freq) \
19   MCFG_DEVICE_ADD(_tag, MB90092, _freq) \
20
21
22//**************************************************************************
23//  TYPE DEFINITIONS
24//**************************************************************************
25
26enum
27{
28   OSD_COMMAND = 0,
29   OSD_DATA
30};
31
32
33// ======================> mb90092_device
34
35class mb90092_device :   public device_t,
36                  public device_memory_interface
37{
38public:
39   // construction/destruction
40   mb90092_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
41
42   // I/O operations
43   DECLARE_WRITE8_MEMBER( write );
44
45   UINT32 screen_update(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect);
46   virtual const rom_entry *device_rom_region() const;
47
48protected:
49   // device-level overrides
50   virtual void device_validity_check(validity_checker &valid) const;
51   virtual void device_start();
52   virtual void device_reset();
53   virtual const address_space_config *memory_space_config(address_spacenum spacenum = AS_0) const;
54
55private:
56   UINT8 m_cmd_ff;
57   UINT8 m_cmd,m_cmd_param;
58   UINT16 m_osd_addr;
59
60   inline UINT16 read_word(offs_t address);
61   inline void write_word(offs_t address, UINT16 data);
62
63   const address_space_config      m_space_config;
64};
65
66
67// device type definition
68extern const device_type MB90092;
69
70
71
72//**************************************************************************
73//  GLOBAL VARIABLES
74//**************************************************************************
75
76
77
78#endif
trunk/src/emu/video/m50458.c
r17550r17551
22
33   Mitsubishi M50458 OSD chip
44
5   preliminary device by Angelo Salese
5   device by Angelo Salese
66
77   TODO:
88   - vertical scrolling needs references (might work differently and/or in
trunk/src/emu/emu.mak
r17550r17551
295295   $(EMUVIDEO)/i8275.o      \
296296   $(EMUVIDEO)/k053250.o      \
297297   $(EMUVIDEO)/m50458.o      \
298   $(EMUVIDEO)/mb90092.o      \
298299   $(EMUVIDEO)/mc6845.o      \
299300   $(EMUVIDEO)/msm6255.o      \
300301   $(EMUVIDEO)/pc_cga.o      \

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