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i8275x: Cleanup. (nw)

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This commit is contained in:
Curt Coder 2014-04-02 13:39:36 +00:00
parent a8ce9e5e33
commit 15912257ce
1 changed files with 53 additions and 48 deletions
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101
src/emu/video/i8275x.c
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@ -25,8 +25,12 @@
// MACROS / CONSTANTS
//**************************************************************************
#define LOG 0
const int DMA_BURST_SPACING[] = { 0, 7, 15, 23, 31, 39, 47, 55 };
#define DOUBLE_SPACED_ROWS \
BIT(m_param[REG_SCN1], 7)
@ -66,13 +70,14 @@ const int DMA_BURST_SPACING[] = { 0, 7, 15, 23, 31, 39, 47, 55 };
//**************************************************************************
// somethign
// DEVICE DEFINITIONS
//**************************************************************************
// device type definition
const device_type I8275x = &device_creator<i8275x_device>;
//**************************************************************************
// LIVE DEVICE
//**************************************************************************
@ -81,30 +86,30 @@ const device_type I8275x = &device_creator<i8275x_device>;
// i8275x_device - constructor
//-------------------------------------------------
i8275x_device::i8275x_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock)
: device_t(mconfig, I8275x, "I8275", tag, owner, clock, "i8275x", __FILE__),
device_video_interface(mconfig, *this),
m_write_irq(*this),
m_write_drq(*this),
m_write_hrtc(*this),
m_write_vrtc(*this),
m_display_cb(NULL),
m_status(0),
m_param_idx(0),
m_param_end(0),
m_buffer_idx(0),
m_fifo_next(false),
m_buffer_dma(0),
m_lpen(0),
m_hlgt(0),
m_vsp(0),
m_gpa(0),
m_rvv(0),
m_lten(0),
m_scanline(0),
m_du(false),
m_cursor_blink(0),
m_char_blink(0)
i8275x_device::i8275x_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) :
device_t(mconfig, I8275x, "I8275", tag, owner, clock, "i8275x", __FILE__),
device_video_interface(mconfig, *this),
m_write_irq(*this),
m_write_drq(*this),
m_write_hrtc(*this),
m_write_vrtc(*this),
m_display_cb(NULL),
m_status(0),
m_param_idx(0),
m_param_end(0),
m_buffer_idx(0),
m_fifo_next(false),
m_buffer_dma(0),
m_lpen(0),
m_hlgt(0),
m_vsp(0),
m_gpa(0),
m_rvv(0),
m_lten(0),
m_scanline(0),
m_du(false),
m_cursor_blink(0),
m_char_blink(0)
{
}
@ -173,12 +178,12 @@ void i8275x_device::device_timer(emu_timer &timer, device_timer_id id, int param
switch (id)
{
case TIMER_HRTC_ON:
//logerror("I8275 '%s' y %u x %u HRTC 1\n", tag(), y, x);
//if (LOG) logerror("I8275 '%s' y %u x %u HRTC 1\n", tag(), y, x);
m_write_hrtc(1);
break;
case TIMER_DRQ_ON:
//logerror("I8275 '%s' y %u x %u DRQ 1\n", tag(), y, x);
//if (LOG) logerror("I8275 '%s' y %u x %u DRQ 1\n", tag(), y, x);
m_write_drq(1);
m_drq_off_timer->adjust(clocks_to_attotime(DMA_BURST_COUNT));
break;
@ -188,17 +193,17 @@ void i8275x_device::device_timer(emu_timer &timer, device_timer_id id, int param
{
m_status |= ST_DU;
m_du = true;
//logerror("I8275 '%s' y %u x %u DRQ 0\n", tag(), y, x);
//if (LOG) logerror("I8275 '%s' y %u x %u DRQ 0\n", tag(), y, x);
m_write_drq(0);
}
else if (m_buffer_idx == CHARACTERS_PER_ROW)
{
//logerror("I8275 '%s' y %u x %u DRQ 0\n", tag(), y, x);
//if (LOG) logerror("I8275 '%s' y %u x %u DRQ 0\n", tag(), y, x);
m_write_drq(0);
}
else if (DMA_BURST_SPACE > 0)
{
//logerror("I8275 '%s' y %u x %u DRQ 0\n", tag(), y, x);
//if (LOG) logerror("I8275 '%s' y %u x %u DRQ 0\n", tag(), y, x);
m_write_drq(0);
m_drq_on_timer->adjust(clocks_to_attotime(DMA_BURST_SPACE));
}
@ -207,26 +212,26 @@ void i8275x_device::device_timer(emu_timer &timer, device_timer_id id, int param
case TIMER_SCANLINE:
if (!(m_status & ST_VE)) break;
//logerror("I8275 '%s' y %u x %u HRTC 0\n", tag(), y, x);
//if (LOG) logerror("I8275 '%s' y %u x %u HRTC 0\n", tag(), y, x);
m_write_hrtc(0);
if (m_scanline == 0)
{
//logerror("I8275 '%s' y %u x %u VRTC 0\n", tag(), y, x);
//if (LOG) logerror("I8275 '%s' y %u x %u VRTC 0\n", tag(), y, x);
m_write_vrtc(0);
}
else if (m_scanline == m_irq_scanline)
{
if (m_status & ST_IE)
{
//logerror("I8275 '%s' y %u x %u IRQ 1\n", tag(), y, x);
//if (LOG) logerror("I8275 '%s' y %u x %u IRQ 1\n", tag(), y, x);
m_status |= ST_IR;
m_write_irq(ASSERT_LINE);
}
}
else if (m_scanline == m_vrtc_scanline)
{
//logerror("I8275 '%s' y %u x %u VRTC 1\n", tag(), y, x);
//if (LOG) logerror("I8275 '%s' y %u x %u VRTC 1\n", tag(), y, x);
m_write_vrtc(1);
// reset field attributes
@ -366,7 +371,7 @@ READ8_MEMBER( i8275x_device::read )
if (m_status & ST_IR)
{
//logerror("I8275 '%s' IRQ 0\n", tag());
//if (LOG) logerror("I8275 '%s' IRQ 0\n", tag());
m_write_irq(CLEAR_LINE);
}
@ -395,15 +400,15 @@ WRITE8_MEMBER( i8275x_device::write )
{
if (offset & 0x01)
{
logerror("I8275 '%s' Command %02x\n", tag(), data);
if (LOG) logerror("I8275 '%s' Command %02x\n", tag(), data);
switch (data >> 5)
{
case CMD_RESET:
logerror("I8275 '%s' Reset\n", tag());
if (LOG) logerror("I8275 '%s' Reset\n", tag());
m_status &= ~ST_IE;
logerror("I8275 '%s' IRQ 0\n", tag());
if (LOG) logerror("I8275 '%s' IRQ 0\n", tag());
m_write_irq(CLEAR_LINE);
m_param_idx = REG_SCN1;
@ -413,47 +418,47 @@ WRITE8_MEMBER( i8275x_device::write )
case CMD_START_DISPLAY:
{
m_param[REG_DMA] = data;
logerror("I8275 '%s' Start Display %u %u\n", tag(), DMA_BURST_COUNT, DMA_BURST_SPACE);
if (LOG) logerror("I8275 '%s' Start Display %u %u\n", tag(), DMA_BURST_COUNT, DMA_BURST_SPACE);
m_status |= (ST_IE | ST_VE);
}
break;
case CMD_STOP_DISPLAY:
logerror("I8275 '%s' Stop Display\n", tag());
if (LOG) logerror("I8275 '%s' Stop Display\n", tag());
m_status &= ~ST_VE;
break;
case CMD_READ_LIGHT_PEN:
logerror("I8275 '%s' Read Light Pen\n", tag());
if (LOG) logerror("I8275 '%s' Read Light Pen\n", tag());
m_param_idx = REG_LPEN_COL;
m_param_end = REG_LPEN_ROW;
break;
case CMD_LOAD_CURSOR:
logerror("I8275 '%s' Load Cursor\n", tag());
if (LOG) logerror("I8275 '%s' Load Cursor\n", tag());
m_param_idx = REG_CUR_COL;
m_param_end = REG_CUR_ROW;
break;
case CMD_ENABLE_INTERRUPT:
logerror("I8275 '%s' Enable Interrupt\n", tag());
if (LOG) logerror("I8275 '%s' Enable Interrupt\n", tag());
m_status |= ST_IE;
break;
case CMD_DISABLE_INTERRUPT:
logerror("I8275 '%s' Disable Interrupt\n", tag());
if (LOG) logerror("I8275 '%s' Disable Interrupt\n", tag());
m_status &= ~ST_IE;
break;
case CMD_PRESET_COUNTERS:
logerror("I8275 '%s' Preset Counters\n", tag());
if (LOG) logerror("I8275 '%s' Preset Counters\n", tag());
m_scanline = 0;
break;
}
}
else
{
logerror("I8275 '%s' Parameter %02x\n", tag(), data);
if (LOG) logerror("I8275 '%s' Parameter %02x\n", tag(), data);
m_param[m_param_idx] = data;
@ -473,7 +478,7 @@ WRITE8_MEMBER( i8275x_device::write )
WRITE8_MEMBER( i8275x_device::dack_w )
{
//logerror("DACK write %02x %u\n", data, m_buffer_idx);
//if (LOG) logerror("DACK write %02x %u\n", data, m_buffer_idx);
if (m_fifo_next)
{
@ -553,7 +558,7 @@ void i8275x_device::recompute_parameters()
int max_visible_x = (CHARACTERS_PER_ROW * m_hpixels_per_column) - 1;
int max_visible_y = (CHARACTER_ROWS_PER_FRAME * SCANLINES_PER_ROW) - 1;
logerror("width %u height %u max_x %u max_y %u refresh %f\n", horiz_pix_total, vert_pix_total, max_visible_x, max_visible_y, 1 / ATTOSECONDS_TO_DOUBLE(refresh));
if (LOG) logerror("width %u height %u max_x %u max_y %u refresh %f\n", horiz_pix_total, vert_pix_total, max_visible_x, max_visible_y, 1 / ATTOSECONDS_TO_DOUBLE(refresh));
rectangle visarea;
visarea.set(0, max_visible_x, 0, max_visible_y);