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vt240: WIP (nw)

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This commit is contained in:
cracyc 2016-06-24 21:55:04 -05:00
parent 443938c991
commit 7f18bffb10
1 changed files with 45 additions and 5 deletions
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44
src/mame/drivers/vt240.cpp
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@ -86,6 +86,8 @@ public:
DECLARE_WRITE8_MEMBER(mem_map_sel_w);
DECLARE_READ8_MEMBER(char_buf_r);
DECLARE_WRITE8_MEMBER(char_buf_w);
DECLARE_WRITE8_MEMBER(patmult_w);
DECLARE_WRITE8_MEMBER(vpat_w);
DECLARE_READ8_MEMBER(vram_r);
DECLARE_WRITE8_MEMBER(vram_w);
DECLARE_READ8_MEMBER(vom_r);
@ -107,6 +109,7 @@ public:
UINT8 m_char_buf[16];
UINT8 m_char_idx, m_mask, m_reg0, m_reg1;
UINT8 m_vom[16];
UINT8 m_vpat, m_patmult, m_patcnt, m_patidx;
};
WRITE_LINE_MEMBER(vt240_state::write_keyboard_clock)
@ -232,6 +235,18 @@ WRITE8_MEMBER(vt240_state::char_buf_w)
m_char_idx &= 0xf;
}
WRITE8_MEMBER(vt240_state::patmult_w)
{
m_patmult = data & 0xf;
}
WRITE8_MEMBER(vt240_state::vpat_w)
{
m_vpat = ~data;
m_patcnt = m_patmult;
m_patidx = 0;
}
READ8_MEMBER(vt240_state::vom_r)
{
return m_vom[offset];
@ -255,12 +270,30 @@ WRITE8_MEMBER(vt240_state::vram_w)
data = m_video_ram[offset & 0xffff];
else if(BIT(m_reg0, 4))
{
data = m_char_buf[m_char_idx++];
UINT8 chr;
if(BIT(m_reg0, 6))
{
chr = BITSWAP8(m_vpat, m_patidx, m_patidx, m_patidx, m_patidx, m_patidx, m_patidx, m_patidx, m_patidx);
if(m_patcnt-- == 0)
{
m_patcnt = m_patmult;
if(++m_patidx > 7)
m_patidx = 0;
}
}
else
{
chr = m_char_buf[m_char_idx++];
m_char_idx &= 0xf;
offset = BIT(offset, 16) | (offset & 0xfffe);
}
if(!BIT(m_reg0, 3))
data = (data & ~m_mask) | (m_video_ram[offset & 0xffff] & m_mask);
data = (chr & ~m_mask) | (m_video_ram[offset & 0xffff] & m_mask);
else
data = (chr & ~data);
logerror("%x %x %x %x %x\n", offset, m_vpat, data, m_mask, chr);
}
m_video_ram[offset & 0xffff] = data;
}
@ -308,7 +341,9 @@ static ADDRESS_MAP_START( vt240_mem, AS_PROGRAM, 16, vt240_state )
AM_RANGE (0174000, 0174003) AM_DEVWRITE8("upd7220", upd7220_device, write, 0x00ff)
AM_RANGE (0174040, 0174077) AM_WRITE8(vom_w, 0x00ff)
AM_RANGE (0174140, 0174141) AM_WRITE8(char_buf_w, 0x00ff)
AM_RANGE (0174400, 0174401) AM_WRITE8(patmult_w, 0x00ff)
AM_RANGE (0174440, 0174441) AM_WRITE8(mask_w, 0x00ff)
AM_RANGE (0174500, 0174501) AM_WRITE8(vpat_w, 0x00ff)
AM_RANGE (0174600, 0174601) AM_WRITE8(reg0_w, 0x00ff)
AM_RANGE (0174640, 0174641) AM_WRITE8(reg1_w, 0x00ff)
AM_RANGE (0175000, 0175005) AM_READWRITE8(i8085_comm_r, i8085_comm_w, 0x00ff)
@ -331,7 +366,9 @@ static ADDRESS_MAP_START(vt240_char_io, AS_IO, 8, vt240_state)
AM_RANGE(0x10, 0x1f) AM_READWRITE(vom_r, vom_w)
AM_RANGE(0x20, 0x20) AM_READWRITE(t11_comm_r, t11_comm_w)
AM_RANGE(0x30, 0x30) AM_READWRITE(char_buf_r, char_buf_w)
AM_RANGE(0x80, 0x80) AM_WRITE(patmult_w)
AM_RANGE(0x90, 0x90) AM_WRITE(mask_w)
AM_RANGE(0xa0, 0xa0) AM_WRITE(vpat_w)
AM_RANGE(0xc0, 0xc0) AM_WRITE(reg0_w)
AM_RANGE(0xd0, 0xd0) AM_WRITE(reg1_w)
ADDRESS_MAP_END
@ -349,6 +386,9 @@ void vt240_state::machine_reset()
m_mem_map_sel = 0;
m_t11 = 1;
m_i8085_rdy = 1;
m_char_idx = 0;
m_patcnt = 0;
m_patidx = 0;
}
static const gfx_layout vt240_chars_8x10 =