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pc9801: 8bit dma pages (nw)

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This commit is contained in:
cracyc 2016-02-18 15:48:22 -06:00
parent 5cda998234
commit 553c0c73c5
1 changed files with 57 additions and 27 deletions
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84
src/mame/drivers/pc9801.cpp
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@ -513,6 +513,7 @@ public:
UINT8 *m_kanji_rom;
UINT8 m_dma_offset[4];
UINT8 m_dma_autoinc[4];
int m_dack;
UINT8 m_video_ff[8],m_gfx_ff;
@ -570,7 +571,9 @@ public:
UINT8 m_sys_type;
DECLARE_WRITE_LINE_MEMBER( write_uart_clock );
DECLARE_WRITE8_MEMBER(rtc_dmapg_w);
DECLARE_WRITE8_MEMBER(rtc_w);
DECLARE_WRITE8_MEMBER(dmapg4_w);
DECLARE_WRITE8_MEMBER(dmapg8_w);
DECLARE_WRITE8_MEMBER(nmi_ctrl_w);
DECLARE_WRITE8_MEMBER(vrtc_clear_w);
DECLARE_WRITE8_MEMBER(pc9801_video_ff_w);
@ -975,29 +978,29 @@ UPD7220_DRAW_TEXT_LINE_MEMBER( pc9801_state::hgdc_draw_text )
}
WRITE8_MEMBER(pc9801_state::rtc_dmapg_w)
WRITE8_MEMBER(pc9801_state::rtc_w)
{
if((offset & 1) == 0)
{
if(offset == 0)
{
m_rtc->c0_w((data & 0x01) >> 0);
m_rtc->c1_w((data & 0x02) >> 1);
m_rtc->c2_w((data & 0x04) >> 2);
m_rtc->stb_w((data & 0x08) >> 3);
m_rtc->clk_w((data & 0x10) >> 4);
m_rtc->data_in_w(((data & 0x20) >> 5));
if(data & 0xc0)
logerror("RTC write to undefined bits %02x\n",data & 0xc0);
}
else
logerror("Write to undefined port [%02x] <- %02x\n",offset+0x20,data);
}
else // odd
{
// logerror("Write to DMA bank register %d %02x\n",((offset >> 1)+1) & 3,data);
m_dma_offset[((offset >> 1)+1) & 3] = data & 0x0f;
}
m_rtc->c0_w((data & 0x01) >> 0);
m_rtc->c1_w((data & 0x02) >> 1);
m_rtc->c2_w((data & 0x04) >> 2);
m_rtc->stb_w((data & 0x08) >> 3);
m_rtc->clk_w((data & 0x10) >> 4);
m_rtc->data_in_w(((data & 0x20) >> 5));
if(data & 0xc0)
logerror("RTC write to undefined bits %02x\n",data & 0xc0);
}
WRITE8_MEMBER(pc9801_state::dmapg4_w)
{
m_dma_offset[(offset+1) & 3] = data & 0x0f;
}
WRITE8_MEMBER(pc9801_state::dmapg8_w)
{
if(offset == 4)
m_dma_autoinc[data & 3] = (data >> 2) & 3;
else if(offset < 4)
m_dma_offset[(offset+1) & 3] = data;
}
WRITE8_MEMBER(pc9801_state::nmi_ctrl_w)
@ -1783,7 +1786,8 @@ static ADDRESS_MAP_START( pc9801_io, AS_IO, 16, pc9801_state )
ADDRESS_MAP_UNMAP_HIGH
AM_RANGE(0x0000, 0x001f) AM_DEVREADWRITE8("i8237", am9517a_device, read, write, 0xff00)
AM_RANGE(0x0000, 0x000f) AM_READWRITE8(pic_r, pic_w, 0x00ff) // i8259 PIC (bit 3 ON slave / master) / i8237 DMA
AM_RANGE(0x0020, 0x0027) AM_WRITE8(rtc_dmapg_w,0xffff) // RTC / DMA registers (LS244)
AM_RANGE(0x0020, 0x0021) AM_WRITE8(rtc_w,0x00ff)
AM_RANGE(0x0020, 0x0027) AM_WRITE8(dmapg4_w,0xff00)
AM_RANGE(0x0030, 0x0037) AM_DEVREADWRITE8("ppi8255_sys", i8255_device, read, write, 0xff00) //i8251 RS232c / i8255 system port
AM_RANGE(0x0040, 0x0047) AM_DEVREADWRITE8("ppi8255_prn", i8255_device, read, write, 0x00ff)
AM_RANGE(0x0040, 0x0043) AM_DEVREADWRITE8("keyb", pc9801_kbd_device, rx_r, tx_w, 0xff00) //i8255 printer port / i8251 keyboard
@ -2241,6 +2245,7 @@ ADDRESS_MAP_END
static ADDRESS_MAP_START( pc9801ux_io, AS_IO, 16, pc9801_state )
ADDRESS_MAP_UNMAP_HIGH
AM_RANGE(0x0020, 0x002f) AM_WRITE8(dmapg8_w,0xff00)
AM_RANGE(0x0050, 0x0057) AM_NOP // 2dd ppi?
AM_RANGE(0x005c, 0x005f) AM_READ(pc9821_timestamp_r) AM_WRITENOP // artic
AM_RANGE(0x0068, 0x006b) AM_WRITE8(pc9801rs_video_ff_w,0x00ff) //mode FF / <undefined>
@ -2479,7 +2484,8 @@ static ADDRESS_MAP_START( pc9821_io, AS_IO, 32, pc9801_state )
// ADDRESS_MAP_UNMAP_HIGH // TODO: a read to somewhere makes this to fail at POST
AM_RANGE(0x0000, 0x001f) AM_DEVREADWRITE8("i8237", am9517a_device, read, write, 0xff00ff00)
AM_RANGE(0x0000, 0x000f) AM_READWRITE8(pic_r, pic_w, 0x00ff00ff) // i8259 PIC (bit 3 ON slave / master) / i8237 DMA
AM_RANGE(0x0020, 0x0027) AM_WRITE8(rtc_dmapg_w, 0xffffffff) // RTC / DMA registers (LS244)
AM_RANGE(0x0020, 0x0023) AM_WRITE8(rtc_w,0x000000ff)
AM_RANGE(0x0020, 0x002f) AM_WRITE8(dmapg8_w,0xff00ff00)
AM_RANGE(0x0030, 0x0037) AM_DEVREADWRITE8("ppi8255_sys", i8255_device, read, write, 0xff00ff00) //i8251 RS232c / i8255 system port
AM_RANGE(0x0040, 0x0047) AM_DEVREADWRITE8("ppi8255_prn", i8255_device, read, write, 0x00ff00ff)
AM_RANGE(0x0040, 0x0043) AM_DEVREADWRITE8("keyb", pc9801_kbd_device, rx_r, tx_w, 0xff00ff00) //i8255 printer port / i8251 keyboard
@ -2883,6 +2889,18 @@ READ8_MEMBER(pc9801_state::dma_read_byte)
{
address_space &program = m_maincpu->space(AS_PROGRAM);
offs_t addr = (m_dma_offset[m_dack] << 16) | offset;
if(offset == 0xffff)
{
switch(m_dma_autoinc[m_dack])
{
case 1:
++m_dma_offset[m_dack] &= 0xf;
break;
case 3:
++m_dma_offset[m_dack] &= 0xff;
break;
}
}
// logerror("%08x\n",addr);
@ -2894,7 +2912,18 @@ WRITE8_MEMBER(pc9801_state::dma_write_byte)
{
address_space &program = m_maincpu->space(AS_PROGRAM);
offs_t addr = (m_dma_offset[m_dack] << 16) | offset;
if(offset == 0xffff)
{
switch(m_dma_autoinc[m_dack])
{
case 1:
++m_dma_offset[m_dack] &= 0xf;
break;
case 3:
++m_dma_offset[m_dack] &= 0xff;
break;
}
}
// logerror("%08x %02x\n",addr,data);
program.write_byte(addr, data);
@ -3139,6 +3168,7 @@ MACHINE_RESET_MEMBER(pc9801_state,pc9801_common)
m_mouse.control = 0xff;
m_mouse.freq_reg = 0;
m_mouse.freq_index = 0;
m_dma_autoinc[0] = m_dma_autoinc[1] = m_dma_autoinc[2] = m_dma_autoinc[3] = 0;
memset(&m_egc, 0, sizeof(m_egc));
}
@ -3430,7 +3460,7 @@ static MACHINE_CONFIG_START( pc9801rs, pc9801_state )
MCFG_RAM_ADD(RAM_TAG)
MCFG_RAM_DEFAULT_SIZE("1664K")
MCFG_RAM_EXTRA_OPTIONS("640K,3712K,7808K")
MCFG_RAM_EXTRA_OPTIONS("640K,3712K,7808K,16M")
MCFG_DEVICE_MODIFY("upd7220_btm")
MCFG_DEVICE_ADDRESS_MAP(AS_0, upd7220_grcg_2_map)