Sprinter/mame
2
0
Fork 0
mirror of https://github.com/holub/mame synced 2025-04-24 17:30:55 +03:00
Code Issues Actions 1 Packages Projects Releases Wiki Activity

brought back the full vertical size of the screen for SMS games,

Browse Source 
by using custom code to copy from the SMS VDP bitmap...
I could use some help from people with a better knowledge of the
315-5124, to e.g. understand if the problem is in the raw screen
parameters, in the VDP or anywhere else. nw.
This commit is contained in:
Fabio Priuli 2014-03-25 18:27:43 +00:00
parent fbbf0a11d4
commit 2a6ef296b1
2 changed files with 24 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

27
src/mame/drivers/megatech.c
View File

@ -507,14 +507,23 @@ WRITE8_MEMBER(mtech_state::megatech_bios_port_7f_w)
}
READ8_MEMBER(mtech_state::vdp1_count_r)
{
address_space &prg = m_bioscpu->space(AS_PROGRAM);
if (offset & 0x01)
return m_vdp1->hcount_read(prg, offset);
else
return m_vdp1->vcount_read(prg, offset);
}
static ADDRESS_MAP_START( megatech_bios_portmap, AS_IO, 8, mtech_state )
ADDRESS_MAP_GLOBAL_MASK(0xff)
AM_RANGE(0x3f, 0x3f) AM_WRITE(megatech_bios_port_ctrl_w)
AM_RANGE(0x7f, 0x7f) AM_WRITE(megatech_bios_port_7f_w)
AM_RANGE(0x7f, 0x7f) AM_READWRITE(sms_vcounter_r, megatech_bios_port_7f_w)
AM_RANGE(0xbe, 0xbe) AM_DEVREADWRITE( "vdp1", sega315_5124_device, vram_read, vram_write )
AM_RANGE(0xbf, 0xbf) AM_DEVREADWRITE( "vdp1", sega315_5124_device, register_read, register_write )
AM_RANGE(0x40, 0x41) AM_MIRROR(0x3e) AM_READ(vdp1_count_r)
AM_RANGE(0x80, 0x80) AM_MIRROR(0x3e) AM_DEVREADWRITE("vdp1", sega315_5124_device, vram_read, vram_write)
AM_RANGE(0x81, 0x81) AM_MIRROR(0x3e) AM_DEVREADWRITE("vdp1", sega315_5124_device, register_read, register_write)
AM_RANGE(0xdc, 0xdd) AM_READ(megatech_bios_joypad_r) // player inputs
ADDRESS_MAP_END
@ -546,7 +555,17 @@ UINT32 mtech_state::screen_update_mtnew(screen_device &screen, bitmap_rgb32 &bit
if (!m_current_game_is_sms)
screen_update_megadriv(screen, bitmap, cliprect);
else
m_vdp->screen_update(screen, bitmap, cliprect);
{
// m_vdp->screen_update(screen, bitmap, cliprect);
for (int y = 0; y < 224; y++)
{
UINT32* lineptr = &bitmap.pix32(y, 0);
UINT32* srcptr = &m_vdp->get_bitmap().pix32(y + SEGA315_5124_TBORDER_START + SEGA315_5124_NTSC_224_TBORDER_HEIGHT);
for (int x = 0; x < SEGA315_5124_WIDTH; x++)
lineptr[x] = srcptr[x];
}
}
return 0;
}

1
src/mame/includes/megadriv.h
View File

@ -504,6 +504,7 @@ public:
DECLARE_WRITE8_MEMBER( megatech_bios_port_ctrl_w );
DECLARE_READ8_MEMBER( megatech_bios_joypad_r );
DECLARE_WRITE8_MEMBER (megatech_bios_port_7f_w);
READ8_MEMBER(vdp1_count_r);
READ8_MEMBER(sms_count_r);
READ8_MEMBER(sms_ioport_dc_r);
READ8_MEMBER(sms_ioport_dd_r);