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ef9340_1: add window boxing and y zoom mode

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hap 2024-12-04 19:42:40 +01:00
parent 79afe949a3
commit 32c7c64dc1
2 changed files with 15 additions and 11 deletions
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22
src/devices/video/ef9340_1.cpp
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@ -16,8 +16,6 @@ This is implemented with a callback. The datasheet explains how to hook up
TODO:
- busy state (right now it is immediate)
- internal display timing (on g7400, most of it is done externally)
- window boxing
- Y zoom
- RES(restart) pin
***************************************************************************/
@ -316,7 +314,11 @@ TIMER_CALLBACK_MEMBER(ef9340_1_device::draw_scanline)
if (vpos < 0)
return;
int zoom = (m_ef9340.Y0 & 0x20 && vpos >= 10) ? 2 : 1;
int slice = vpos % 10;
if (zoom == 2)
slice = ((vpos - 10) % 20) / 2;
bool dh = false;
if (vpos == 0)
m_ef9340.h_parity = false;
@ -330,8 +332,9 @@ TIMER_CALLBACK_MEMBER(ef9340_1_device::draw_scanline)
u16 char_data = 0x00;
u8 fg = 0;
u8 bg = 0;
bool conceal = false;
bool box = bool(m_ef9340.R & 0x02);
bool underline = false;
bool blank = false;
bool w_parity = false;
if (vpos < 10)
@ -353,7 +356,7 @@ TIMER_CALLBACK_MEMBER(ef9340_1_device::draw_scanline)
else
{
// displaying regular row
y_row = ((m_ef9340.Y0 & 0x1f) + (vpos - 10) / 10) % 24;
y_row = ((m_ef9340.Y0 & 0x1f) + (vpos - 10) / (10 * zoom)) % 24;
}
for (int x = 0; x < 40; x++)
@ -454,14 +457,15 @@ TIMER_CALLBACK_MEMBER(ef9340_1_device::draw_scanline)
for (int i = 0; i < 8; i++)
{
u16 d = blank ? 0 : (char_data & 1) ? fg : bg;
m_tmp_bitmap.pix(m_offset_y + vpos, m_offset_x + x*8 + i) = d | 8;
u16 d = (conceal || box) ? 0 : (char_data & 1) ? fg : bg;
m_tmp_bitmap.pix(m_offset_y + vpos, m_offset_x + x*8 + i) = d | (box ? 0 : 8);
char_data >>= 1;
}
if (del)
{
blank = m_ef9340.R & 0x04 && b & 0x01;
conceal = b & 0x01 && (m_ef9340.R & 0x04);
box = !(b & 0x02) && (m_ef9340.R & 0x02);
underline = bool(b & 0x04);
}
}
@ -469,11 +473,11 @@ TIMER_CALLBACK_MEMBER(ef9340_1_device::draw_scanline)
else
{
for (int i = 0; i < 40 * 8; i++)
m_tmp_bitmap.pix(m_offset_y + vpos, m_offset_x + i) = 0;
m_tmp_bitmap.pix(m_offset_y + vpos, m_offset_x + i) = 8;
}
// determine next h parity
if (vpos >= 10 && slice == 9)
if (vpos >= 10 && vpos & 1 && slice == 9)
{
if (dh)
m_ef9340.h_parity = !m_ef9340.h_parity;

4
src/devices/video/i8244.cpp
View File

@ -662,13 +662,13 @@ void i8244_device::draw_minor(int scanline, bitmap_ind16 &bitmap, const rectangl
switch (m_vdc.s.sprites[i].color & 0x03)
{
case 1: // Xg attribute set
case 1: // X9 attribute set
x_shift = 1;
break;
case 2: // S attribute set
x_shift = (((scanline - y) / zoom_px) & 0x01) ^ 0x01;
break;
case 3: // Xg and S attributes set
case 3: // X9 and S attributes set
x_shift = ((scanline - y) / zoom_px) & 0x01;
break;
default: