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(MESS) excalibur : another attempt at hires graphics. (nw)

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- SET works
- PCGEN ON works
This commit is contained in:
Robert 2014-12-18 01:20:51 +11:00
parent 10f00f694f
commit c9f55a1664
1 changed files with 21 additions and 14 deletions
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35
src/mess/drivers/excali64.c
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@ -19,7 +19,6 @@ ToDo:
- Disk controller
- Graphics commands such as LINE and CIRCLE produce a syntax error.
- Some commands such as HGRCLS are missing from the rom. Perhaps we need a later version?
- SET command produces random graphics instead of the expected lo-res dot.
- The schematic shows the audio counter connected to 2MHz, but this produces
sounds that are too high. Connected to 1MHz for now.
- Serial
@ -86,8 +85,8 @@ static ADDRESS_MAP_START(excali64_mem, AS_PROGRAM, 8, excali64_state)
AM_RANGE(0x0000, 0x1FFF) AM_READ_BANK("bankr1") AM_WRITE_BANK("bankw1")
AM_RANGE(0x2000, 0x2FFF) AM_READ_BANK("bankr2") AM_WRITE_BANK("bankw2")
AM_RANGE(0x3000, 0x3FFF) AM_READ_BANK("bankr3") AM_WRITE_BANK("bankw3")
AM_RANGE(0x4000, 0x4FFF) AM_READ_BANK("bankr4") AM_WRITE_BANK("bankw4")
AM_RANGE(0x5000, 0xFFFF) AM_RAM AM_REGION("rambank", 0x5000)
AM_RANGE(0x4000, 0xBFFF) AM_READ_BANK("bankr4") AM_WRITE_BANK("bankw4")
AM_RANGE(0xC000, 0xFFFF) AM_RAM AM_REGION("rambank", 0xC000)
ADDRESS_MAP_END
static ADDRESS_MAP_START(excali64_io, AS_IO, 8, excali64_state)
@ -245,6 +244,7 @@ WRITE8_MEMBER( excali64_state::port70_w )
membank("bankr1")->set_entry(0);
membank("bankr2")->set_entry(0);
membank("bankr3")->set_entry(0);
membank("bankr4")->set_entry(0);
membank("bankw2")->set_entry(0);
membank("bankw3")->set_entry(0);
membank("bankw4")->set_entry(0);
@ -252,22 +252,24 @@ WRITE8_MEMBER( excali64_state::port70_w )
else
if BIT(data, 0)
{
// select videoram and hiresram for writing, and ROM for reading
// select videoram and hiresram
membank("bankr1")->set_entry(1);
membank("bankr2")->set_entry(1);
membank("bankr3")->set_entry(1);
membank("bankr2")->set_entry(2);
membank("bankr3")->set_entry(2);
membank("bankw2")->set_entry(2);
membank("bankw3")->set_entry(2);
membank("bankr4")->set_entry(2);
membank("bankw4")->set_entry(2);
}
else
{
// as above, except 4000-4FFF is main ram
// select rom, videoram, and main ram
membank("bankr1")->set_entry(1);
membank("bankr2")->set_entry(1);
membank("bankr3")->set_entry(1);
membank("bankw2")->set_entry(2);
membank("bankw3")->set_entry(2);
membank("bankr4")->set_entry(0);
membank("bankw4")->set_entry(0);
}
@ -284,7 +286,7 @@ MACHINE_RESET_MEMBER( excali64_state, excali64 )
membank("bankr4")->set_entry(0); // read from RAM
membank("bankw1")->set_entry(0); // write to RAM
membank("bankw2")->set_entry(2); // write to videoram
membank("bankw3")->set_entry(2); // write to hiresram
membank("bankw3")->set_entry(2); // write to videoram hires pointers
membank("bankw4")->set_entry(0); // write to RAM
m_maincpu->reset();
}
@ -325,7 +327,7 @@ PALETTE_INIT_MEMBER( excali64_state, excali64 )
// do this here because driver_init hasn't run yet
m_p_videoram = memregion("videoram")->base();
m_p_chargen = memregion("chargen")->base();
m_p_hiresram = memregion("hiresram")->base();
m_p_hiresram = m_p_videoram + 0x2000;
UINT8 *main = memregion("roms")->base();
UINT8 *ram = memregion("rambank")->base();
@ -345,9 +347,12 @@ PALETTE_INIT_MEMBER( excali64_state, excali64 )
membank("bankr2")->configure_entry(1, &main[0x4000]);//boot
membank("bankr3")->configure_entry(1, &main[0x5000]);//boot
// videoram
membank("bankr2")->configure_entry(2, &m_p_videoram[0x0000]);
membank("bankw2")->configure_entry(2, &m_p_videoram[0x0000]);//boot
// hiresram
membank("bankw3")->configure_entry(2, &m_p_hiresram[0x0000]);//boot
membank("bankr3")->configure_entry(2, &m_p_videoram[0x1000]);
membank("bankw3")->configure_entry(2, &m_p_videoram[0x1000]);//boot
membank("bankr4")->configure_entry(2, &m_p_hiresram[0x0000]);
membank("bankw4")->configure_entry(2, &m_p_hiresram[0x0000]);
// Set up foreground palettes
@ -388,8 +393,11 @@ MC6845_UPDATE_ROW( excali64_state::update_row )
fg = col_base + (col >> 4);
bg = 32 + ((col >> 1) & 7);
if (BIT(col, 0) & BIT(chr, 7))
gfx = m_p_hiresram[(chr<<4) | ra]; // hires definition
if BIT(col, 0)
{
UINT16 hires_bank = (m_p_videoram[mem+0x1000] ^ 4) << 24;
gfx = m_p_hiresram[hires_bank | (chr<<4) | ra]; // hires definition
}
else
gfx = m_p_chargen[(chr<<4) | ra]; // normal character
@ -478,8 +486,7 @@ ROM_START( excali64 )
ROM_FILL(0x4f7, 1, 8)
ROM_REGION(0x10000, "rambank", ROMREGION_ERASE00)
ROM_REGION(0x1000, "videoram", ROMREGION_ERASE00)
ROM_REGION(0x1000, "hiresram", ROMREGION_ERASE00)
ROM_REGION(0xA000, "videoram", ROMREGION_ERASE00)
ROM_REGION(0x1020, "chargen", 0)
ROM_LOAD( "genex_3.ic43", 0x0000, 0x1000, CRC(b91619a9) SHA1(2ced636cb7b94ba9d329868d7ecf79963cefe9d9) )