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r12876 Saturday 17th September, 2011 at 23:45:06 UTC by Robbbert
FP1100 - added bitmapped video.
[src/mess/drivers]fp1100.c

src/mess/drivers/fp1100.c
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4242'sub' (06E4): unmapped i/o memory write to 00 = 47 & FF
4343'sub' (06EA): unmapped program memory write to F000 = 70 & FF
4444
452011-09-18 Video (bitmapped) added. Notes:
46- The colour planes are a guess (r,g,b might need swapping around)
47- In "irq_mask_w" is a read of e800. Without this, no videoram writes occur.
48- In "fp1100_vram_w" the data is inverted. Without it, a flashing cursor can be seen.
49- The text mode is also present at 9000-97FF of the maincpu (not bitmapped).
50
4551****************************************************************************/
4652#define ADDRESS_MAP_MODERN
4753
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5561{
5662public:
5763   fp1100_state(const machine_config &mconfig, device_type type, const char *tag)
58      : driver_device(mconfig, type, tag) { }
64      : driver_device(mconfig, type, tag),
65   m_maincpu(*this, "maincpu"),
66   m_subcpu(*this, "sub"),
67   //m_cass(*this, CASSETTE_TAG),
68   //m_wave(*this, WAVE_TAG),
69   //m_speaker(*this, SPEAKER_TAG),
70   //m_printer(*this, "centronics"),
71   m_crtc(*this, "crtc")
72   //m_fdc(*this, "fdc")
73   { }
5974
75   required_device<cpu_device> m_maincpu;
76   required_device<cpu_device> m_subcpu;
77   //required_device<cassette_image_device> m_cass;
78   //required_device<device_t> m_wave;
79   //required_device<device_t> m_speaker;
80   //required_device<device_t> m_printer;
81   required_device<mc6845_device> m_crtc;
82   //required_device<device_t> m_fdc;
6083   DECLARE_READ8_MEMBER(fp1100_mem_r);
6184   DECLARE_WRITE8_MEMBER(fp1100_mem_w);
6285   DECLARE_WRITE8_MEMBER(main_bank_w);
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7295   DECLARE_WRITE8_MEMBER(sub_to_main_w);
7396   DECLARE_WRITE8_MEMBER(portc_w);
7497   UINT8 *m_wram;
75   UINT8 *m_vram;
98   UINT8 *m_p_videoram;
7699   UINT8 m_mem_bank;
77100   UINT8 irq_mask;
78101   UINT8 m_main_latch;
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96119
97120static SCREEN_UPDATE( fp1100 )
98121{
122   fp1100_state *state = screen->machine().driver_data<fp1100_state>();
123   state->m_crtc->update( bitmap, cliprect);
99124   return 0;
100125}
101126
127static MC6845_UPDATE_ROW( fp1100_update_row )
128{
129   fp1100_state *state = device->machine().driver_data<fp1100_state>();
130   UINT8 r,g,b,col,i;
131   UINT16 mem,x;
132   UINT16 *p = BITMAP_ADDR16(bitmap, y, 0);
133
134   for (x = 0; x < x_count; x++)
135   {
136      mem = (((ma+x)<<3) + ra) & 0x3fff;
137      r = state->m_p_videoram[mem];
138      g = state->m_p_videoram[mem+0x4000];
139      b = state->m_p_videoram[mem+0x8000];
140
141      for (i = 0; i < 8; i++)
142      {
143         col = BIT(r, i) + (BIT(g, i) << 1) + (BIT(b, i) << 2);
144         if (x == cursor_x) col ^= 7;
145         *p++ = col;
146      }
147   }
148}
149
102150READ8_MEMBER( fp1100_state::fp1100_mem_r )
103151{
104152   if(m_mem_bank == 0 && offset <= 0x8fff)
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128176
129177   irq_mask = data;
130178   ///printf("%02x\n",data);
131
179   // FIXME - the below 2 lines are needed, otherwise nothing ever gets written to videoram
180   address_space *mem = m_subcpu->memory().space(AS_PROGRAM);
181   data = mem->read_byte(0xe800);
132182}
133183
134184WRITE8_MEMBER( fp1100_state::main_to_sub_w )
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175225
176226READ8_MEMBER( fp1100_state::fp1100_vram_r )
177227{
178   return m_vram[offset];
228   return m_p_videoram[offset];
179229}
180230
181231WRITE8_MEMBER( fp1100_state::fp1100_vram_w )
182232{
183   m_vram[offset] = data ^ 0xff;
233   m_p_videoram[offset] = ~data;
184234}
185235
186236READ8_MEMBER( fp1100_state::main_to_sub_r )
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201251   AM_RANGE(0xff80, 0xffff) AM_RAM      /* upd7801 internal RAM */
202252   AM_RANGE(0x0000, 0x0fff) AM_ROM AM_REGION("sub_ipl",0x0000)
203253   AM_RANGE(0x1000, 0x1fff) AM_ROM AM_REGION("sub_ipl",0x1000)
204   AM_RANGE(0x2000, 0xdfff) AM_READWRITE(fp1100_vram_r,fp1100_vram_w) AM_BASE(m_vram) //vram B/R/G
254   AM_RANGE(0x2000, 0xdfff) AM_READWRITE(fp1100_vram_r,fp1100_vram_w) AM_BASE(m_p_videoram) //vram B/R/G
205255   AM_RANGE(0xe000, 0xe000) AM_DEVWRITE("crtc", mc6845_device, address_w)
206256   AM_RANGE(0xe001, 0xe001) AM_DEVWRITE("crtc", mc6845_device, register_w)
207257   AM_RANGE(0xe400, 0xe400) AM_READ_PORT("DSW") AM_WRITENOP // key mux write
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343393   "screen",   /* screen we are acting on */
344394   8,         /* number of pixels per video memory address */
345395   NULL,      /* before pixel update callback */
346   NULL,      /* row update callback */
396   fp1100_update_row,      /* row update callback */
347397   NULL,      /* after pixel update callback */
348398   DEVCB_NULL,   /* callback for display state changes */
349399   DEVCB_NULL,   /* callback for cursor state changes */
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375425   MCFG_MACHINE_START(fp1100)
376426   MCFG_MACHINE_RESET(fp1100)
377427
378   MCFG_MC6845_ADD("crtc", H46505, XTAL_4MHz/2, mc6845_intf)   /* hand tuned to get ~60 fps */
379
380428   /* video hardware */
381429   MCFG_SCREEN_ADD("screen", RASTER)
382430   MCFG_SCREEN_REFRESH_RATE(60)
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386434   MCFG_SCREEN_VISIBLE_AREA(0, 640-1, 0, 480-1)
387435   MCFG_VIDEO_START(fp1100)
388436   MCFG_SCREEN_UPDATE(fp1100)
389   MCFG_PALETTE_LENGTH(2)
390   MCFG_PALETTE_INIT(black_and_white)
437   MCFG_PALETTE_LENGTH(8)
391438   MCFG_GFXDECODE(fp1100)
439
440   /* Devices */
441   MCFG_MC6845_ADD("crtc", H46505, XTAL_4MHz/2, mc6845_intf)   /* hand tuned to get ~60 fps */
392442MACHINE_CONFIG_END
393443
394444/* ROM definition */

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