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https://github.com/holub/mame
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New WORKING game
-------------------- Little Robin [David Haywood]
This commit is contained in:
Angelo Salese
parent
59e803a5da
commit
b35294cc82
@ -11,24 +11,32 @@ David Haywood
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/*
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strange vdp/memory access chip..
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at the moment gfx / palettes etc. get drawn then erased, I think it's a blitter, with multiple layers
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some of the 'sprite entries' seem a different size, or alignment, hence the bad sprites on the title
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screen. no idea how layers are seleced / cleared right now either
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Notes:
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VDP (Blitter) handling is not 100% correct
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A brief original video (recorded by Dox) can be seen at https://www.youtube.com/watch?v=8THpeogarUk
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maybe it needs read commands working so it knows how many sprites are in
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the list?
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Overall addressing / auto-increment etc. of the VDP device is not fully understood, but for now
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appears to be good enough for the game.
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maybe the vdp 'commands' can be used to store and get back
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write addresses?
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How we distinguish between mode setting (clear, copy, cliprect etc.) VDP commands and actual sprite
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commands is not yet understood. All 'sprite' sections of the blit list seem to be terminated with
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a 0x0000 word, but it isn't clear how the blocks are started, the current method relies on some bits
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of the sprite data offset to determine if we're sprite data, or a command. Maybe this is just a
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quirk of the hardware, and you can't have sprites at those offsets?
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most graphics are stored as packed 4bpp in RAM, expanded before
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writing to the vdp device. actual gfx are 8bpp.
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Copy / Scroll are not yet implemented, see the Smileys between scenes in the original video.
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(Clipping is implemented, but might be per layer, so you do see the sprites vanish, but no
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smileys are drawn)
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How big are the actual framebuffers? Are both also double buffered?
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Sound pitch is directly correlated with irqs, scanline timings and pixel clock,
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so it's surely not 100% correct. Sound sample playbacks looks fine at current time tho.
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------
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Dip sw.1
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--------
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@ -112,8 +120,8 @@ public:
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UINT8 m_sound_index_l,m_sound_index_r;
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UINT16 m_sound_pointer_l,m_sound_pointer_r;
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bitmap_ind16 m_temp_bitmap_sprites;
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bitmap_ind16 m_temp_bitmap_sprites_back; // not currently used
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bitmap_ind16 *m_temp_bitmap_sprites;
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bitmap_ind16 *m_temp_bitmap_sprites_back;
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DECLARE_WRITE16_MEMBER(spritelist_w);
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@ -162,7 +170,7 @@ public:
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else
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{
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if (!(m_spritelist[2] & 0x1000))
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m_temp_bitmap_sprites_back.fill(0, m_temp_bitmap_sprites_back.cliprect());
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m_temp_bitmap_sprites_back->fill(0, m_temp_bitmap_sprites_back->cliprect());
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}
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@ -507,9 +515,7 @@ static INPUT_PORTS_START( littlerb )
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PORT_DIPNAME( 0x2000, 0x2000, DEF_STR( Unknown ) )
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PORT_DIPSETTING( 0x2000, DEF_STR( Off ) )
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PORT_DIPSETTING( 0x0000, DEF_STR( On ) )
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PORT_DIPNAME( 0x4000, 0x4000, "GAME/TEST??" ) // changes what gets uploaded
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PORT_DIPSETTING( 0x4000, DEF_STR( Off ) )
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PORT_DIPSETTING( 0x0000, DEF_STR( On ) )
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PORT_SERVICE( 0x4000, IP_ACTIVE_LOW )
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PORT_DIPNAME( 0x8000, 0x8000, DEF_STR( Unknown ) )
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PORT_DIPSETTING( 0x8000, DEF_STR( Off ) )
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PORT_DIPSETTING( 0x0000, DEF_STR( On ) )
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@ -552,8 +558,8 @@ static SCREEN_UPDATE_IND16(littlerb)
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littlerb_state *state = screen.machine().driver_data<littlerb_state>();
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bitmap.fill(0, cliprect);
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copybitmap_trans(bitmap, state->m_temp_bitmap_sprites_back, 0, 0, 0, 0, cliprect, 0);
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copybitmap_trans(bitmap, state->m_temp_bitmap_sprites, 0, 0, 0, 0, cliprect, 0);
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copybitmap_trans(bitmap, *state->m_temp_bitmap_sprites_back, 0, 0, 0, 0, cliprect, 0);
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copybitmap_trans(bitmap, *state->m_temp_bitmap_sprites, 0, 0, 0, 0, cliprect, 0);
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return 0;
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}
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@ -588,10 +594,13 @@ static TIMER_DEVICE_CALLBACK( littlerb_scanline )
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VIDEO_START( littlerb )
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{
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littlerb_state *state = machine.driver_data<littlerb_state>();
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// machine.primary_screen->register_screen_bitmap(state->m_temp_bitmap_sprites_back);
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// machine.primary_screen->register_screen_bitmap(state->m_temp_bitmap_sprites);
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state->m_temp_bitmap_sprites_back = auto_bitmap_ind16_alloc(machine,512,512);
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state->m_temp_bitmap_sprites = auto_bitmap_ind16_alloc(machine,512,512);
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machine.primary_screen->register_screen_bitmap(state->m_temp_bitmap_sprites_back);
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machine.primary_screen->register_screen_bitmap(state->m_temp_bitmap_sprites);
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state->m_spritelist = (UINT16*)auto_alloc_array_clear(machine, UINT16, 0x20000);
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}
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@ -616,13 +625,22 @@ static void draw_sprite(running_machine &machine, bitmap_ind16 &bitmap, const re
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drawxpos = xpos+x;
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drawypos = ypos+y;
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// odd clipping behavior, count is only increased for visible lines?
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// I suspect the sprite corruption if you're near the top of the screen
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// between level changes is related to this too, data offset values are
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// probably being adjusted as layer is scrolled (and the cliprect is changed)
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// even if they don't move.
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if(drawypos>=cliprect.min_y)
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{
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fulloffs++;
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}
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if(cliprect.contains(drawxpos, drawypos))
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{
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if(pix&0xff) bitmap.pix16(drawypos, drawxpos) = pix;
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}
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drawxpos++;
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fulloffs++;
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}
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}
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}
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@ -634,11 +652,9 @@ static void littlerb_draw_sprites(running_machine &machine)
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int xsize,ysize;
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UINT16* spriteregion = state->m_spritelist;
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//littlerb_printf("frame\n");
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/* the spriteram format is something like this .. */
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// for (offs=2;offs<0xc00;offs+=6) // this will draw different hud gfx.. meaning not ALL entries are 6 words(?!) command based blitter rather than RAM? (but MODE is 3800 when both the sprite 'list' is written, and gfx data?,
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int layer = 0;
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int yoffset = 0;
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littlerb_printf("m_listoffset %04x\n", state->m_listoffset );
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@ -646,6 +662,9 @@ static void littlerb_draw_sprites(running_machine &machine)
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littlerb_alt_printf("start\n");
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int minx = 0 , maxx = 0x14f;
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int miny = 0 , maxy = 0x11f;
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for (offs=0;offs<(state->m_listoffset);)
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{
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@ -668,11 +687,31 @@ static void littlerb_draw_sprites(running_machine &machine)
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// some scroll stuff is here (title -> high score transition)
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// maybe also copy area operations?
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// probably wrong
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if ((spriteregion[offs+4]==0x6000) && (spriteregion[offs+3] & 0x1000))
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state->m_temp_bitmap_sprites_back.fill(0, state->m_temp_bitmap_sprites_back.cliprect());
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// this isn't understood ... note, we still have a hack before draw_sprites is called too
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// usual start of frame
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// Control Word 0040 0090 6000 0026 0000 0012 ---- ---- ---- ----
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// happens in the middle of list during boss death, causes sprites to vanish atm
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// Control Word 0040 ffd6 00aa 00f8 0088 0018 ---- ---- ---- ----
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if (spriteregion[offs+4]==0x6000)
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{
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if (spriteregion[offs+3] & 0x1000)
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state->m_temp_bitmap_sprites_back->fill(0, state->m_temp_bitmap_sprites_back->cliprect());
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}
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else
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state->m_temp_bitmap_sprites.fill(0, state->m_temp_bitmap_sprites.cliprect());
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{
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if (spriteregion[offs+1] != 0xffd6) state->m_temp_bitmap_sprites->fill(0, state->m_temp_bitmap_sprites->cliprect());
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}
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// this is some kind of scroll or copy area..
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// also some of the other values change
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// this is set AFTER the graphics which need to be scrolled are sent and causes the credit text to bounce up and down instead of
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// anything scrolling
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//yoffset = spriteregion[offs+1] - 0x90;
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offs += 6;
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@ -687,10 +726,18 @@ static void littlerb_draw_sprites(running_machine &machine)
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layer = 0;
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minx = spriteregion[offs+6];
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maxx = spriteregion[offs+8];
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miny = spriteregion[offs+7];
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maxy = spriteregion[offs+9];
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offs += 10;
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}
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else if (read_dword == 0x00e40000)
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{
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// same as above?
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littlerb_alt_printf("Control Word %04x %04x %04x %04x %04x %04x %04x %04x %04x %04x\n", spriteregion[offs+0], spriteregion[offs+1], spriteregion[offs+2], spriteregion[offs+3], spriteregion[offs+4], spriteregion[offs+5], spriteregion[offs+6], spriteregion[offs+7], spriteregion[offs+8], spriteregion[offs+9]);
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if (spriteregion[offs+4]==0x6000)
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@ -698,6 +745,13 @@ static void littlerb_draw_sprites(running_machine &machine)
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else
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layer = 0;
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minx = spriteregion[offs+6];
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maxx = spriteregion[offs+8];
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miny = spriteregion[offs+7];
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maxy = spriteregion[offs+9];
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offs += 10;
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}
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else if (read_dword == 0x00000000)
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@ -714,14 +768,53 @@ static void littlerb_draw_sprites(running_machine &machine)
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if (x&0x400) x-=0x800;
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if (y&0x200) y-=0x400;
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y+= yoffset;
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xsize = (spriteregion[offs+4] & 0x01ff); // background gfx for many places at 0x1ff wide
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ysize = (spriteregion[offs+5] & 0x00ff); // player1/player2 texts in service mode sides are 0xff high
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rectangle clip;
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clip.min_x = minx;
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clip.max_x = maxx;
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clip.min_y = miny;
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clip.max_y = maxy;
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// used between levels, and on boss death to clip sprite at the ground for sinking effect
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if (clip.min_x > state->m_temp_bitmap_sprites->cliprect().max_x)
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clip.min_x = state->m_temp_bitmap_sprites->cliprect().max_x;
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if (clip.min_x < state->m_temp_bitmap_sprites->cliprect().min_x)
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clip.min_x = state->m_temp_bitmap_sprites->cliprect().min_x;
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if (clip.max_x > state->m_temp_bitmap_sprites->cliprect().max_x)
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clip.max_x = state->m_temp_bitmap_sprites->cliprect().max_x;
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if (clip.max_x < state->m_temp_bitmap_sprites->cliprect().min_x)
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clip.max_x = state->m_temp_bitmap_sprites->cliprect().min_x;
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if (clip.min_y > state->m_temp_bitmap_sprites->cliprect().max_y)
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clip.min_y = state->m_temp_bitmap_sprites->cliprect().max_y;
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if (clip.min_y < state->m_temp_bitmap_sprites->cliprect().min_y)
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clip.min_y = state->m_temp_bitmap_sprites->cliprect().min_y;
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if (clip.max_y > state->m_temp_bitmap_sprites->cliprect().max_y)
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clip.max_y = state->m_temp_bitmap_sprites->cliprect().max_y;
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if (clip.max_y < state->m_temp_bitmap_sprites->cliprect().min_y)
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clip.max_y = state->m_temp_bitmap_sprites->cliprect().min_y;
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littlerb_alt_printf("%04x %04x %04x %04x %04x %04x\n", spriteregion[offs+0], spriteregion[offs+1], spriteregion[offs+2], spriteregion[offs+3], spriteregion[offs+4], spriteregion[offs+5]);
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if (layer==0) draw_sprite(machine, state->m_temp_bitmap_sprites, state->m_temp_bitmap_sprites.cliprect(),xsize,ysize,fullcode,x,y);
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else draw_sprite(machine, state->m_temp_bitmap_sprites_back, state->m_temp_bitmap_sprites_back.cliprect(),xsize,ysize,fullcode,x,y);
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if (layer==0) draw_sprite(machine, *state->m_temp_bitmap_sprites, clip,xsize,ysize,fullcode,x,y);
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else draw_sprite(machine, *state->m_temp_bitmap_sprites_back, clip,xsize,ysize,fullcode,x,y);
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offs += 6;
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@ -771,4 +864,4 @@ ROM_START( littlerb )
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ROM_END
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GAME( 1993, littlerb, 0, littlerb, littlerb, driver_device, 0, ROT0, "TCH", "Little Robin", GAME_NOT_WORKING|GAME_IMPERFECT_GRAPHICS|GAME_IMPERFECT_SOUND )
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GAME( 1994, littlerb, 0, littlerb, littlerb, driver_device, 0, ROT0, "TCH", "Little Robin", GAME_IMPERFECT_GRAPHICS|GAME_IMPERFECT_SOUND )
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