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ScrollUP fix for the Otrona Attachè

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The implementation of the scroll register is partially delegated to the specific machine video driver.
This same approach was used on the ITT3030 emulation and is probably ok for this peculiar controller.
This commit is contained in:
Stefano 2016-12-15 15:46:32 +01:00 committed by angelosa
parent fc4bbb4660
commit a27e96c63c
1 changed files with 19 additions and 14 deletions
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33
src/mame/drivers/attache.cpp
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@ -222,7 +222,7 @@ private:
// bit 7 = subscript (superscript and subscript combined produces strikethrough)
uint32_t attache_state::screen_update(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect)
{
uint8_t x,y,bit,scan,data;
uint8_t x,y,vy,start,bit,scan,data;
uint8_t dbl_mode = 0; // detemines which half of character to display when using double size attribute,
// as it can start on either odd or even character cells.
@ -261,16 +261,20 @@ uint32_t attache_state::screen_update(screen_device &screen, bitmap_rgb32 &bitma
}
else
bitmap.fill(0);
// Text output
for(y=0;y<(bitmap.height()-1)/10;y++) // lines
{
start = m_crtc->upscroll_offset();
vy = (start + y) % 24;
for(x=0;x<(bitmap.width()-1)/8;x++) // columns
{
assert(((y*128)+x) >= 0 && ((y*128)+x) < ARRAY_LENGTH(m_char_ram));
uint8_t ch = m_char_ram[(y*128)+x];
pen_t fg = m_palette->pen(m_attr_ram[(y*128)+x] & 0x08 ? 2 : 1); // brightness
if(m_attr_ram[(y*128)+x] & 0x10) // double-size
assert(((vy*128)+x) >= 0 && ((vy*128)+x) < ARRAY_LENGTH(m_char_ram));
uint8_t ch = m_char_ram[(vy*128)+x];
pen_t fg = m_palette->pen(m_attr_ram[(vy*128)+x] & 0x08 ? 2 : 1); // brightness
if(m_attr_ram[(vy*128)+x] & 0x10) // double-size
dbl_mode++;
else
dbl_mode = 0;
@ -278,16 +282,16 @@ uint32_t attache_state::screen_update(screen_device &screen, bitmap_rgb32 &bitma
for(scan=0;scan<10;scan++) // 10 scanlines per line
{
data = m_char_rom->base()[ch*16+scan];
if((m_attr_ram[(y*128)+x] & 0xc0) != 0xc0) // if not strikethrough
if((m_attr_ram[(vy*128)+x] & 0xc0) != 0xc0) // if not strikethrough
{
if(m_attr_ram[(y*128)+x] & 0x40) // superscript
if(m_attr_ram[(vy*128)+x] & 0x40) // superscript
{
if(scan >= 5)
data = 0;
else
data = m_char_rom->base()[ch*16+(scan*2)+1];
}
if(m_attr_ram[(y*128)+x] & 0x80) // subscript
if(m_attr_ram[(vy*128)+x] & 0x80) // subscript
{
if(scan < 5)
data = 0;
@ -295,13 +299,13 @@ uint32_t attache_state::screen_update(screen_device &screen, bitmap_rgb32 &bitma
data = m_char_rom->base()[ch*16+((scan-5)*2)+1];
}
}
if((m_attr_ram[(y*128)+x] & 0x20) && scan == 9) // underline
if((m_attr_ram[(vy*128)+x] & 0x20) && scan == 9) // underline
data = 0xff;
if((m_attr_ram[(y*128)+x] & 0xc0) == 0xc0 && scan == 3) // strikethrough
if((m_attr_ram[(vy*128)+x] & 0xc0) == 0xc0 && scan == 3) // strikethrough
data = 0xff;
if(m_attr_ram[(y*128)+x] & 0x04) // reverse
if(m_attr_ram[(vy*128)+x] & 0x04) // reverse
data = ~data;
if(m_attr_ram[(y*128)+x] & 0x10) // double-size
if(m_attr_ram[(vy*128)+x] & 0x10) // double-size
{
uint8_t newdata = 0;
if(dbl_mode & 1)
@ -630,6 +634,7 @@ WRITE8_MEMBER(attache_state::display_data_w)
break;
case DISP_CRTC:
m_crtc->write(space, m_crtc_reg_select, data);
//logerror("CRTC: write reg %02x, data %02x\n",m_crtc_reg_select,data);
break;
case DISP_ATTR:
m_attr_ram[(m_attr_line*128)+(param & 0x7f)] = data;
@ -754,7 +759,7 @@ static ADDRESS_MAP_START( attache_io , AS_IO, 8, attache_state)
AM_RANGE(0xe0, 0xed) AM_DEVREADWRITE("dma",am9517a_device,read,write) AM_MIRROR(0xff00)
AM_RANGE(0xee, 0xee) AM_WRITE(display_command_w) AM_MIRROR(0xff00)
AM_RANGE(0xef, 0xef) AM_READWRITE(dma_mask_r, dma_mask_w) AM_MIRROR(0xff00)
AM_RANGE(0xf0, 0xf3) AM_DEVREADWRITE("sio",z80sio0_device,ba_cd_r, ba_cd_w) AM_MIRROR(0xff00)
AM_RANGE(0xe6, 0xe7) AM_DEVREADWRITE("sio",z80sio0_device,ba_cd_r, ba_cd_w) AM_MIRROR(0xff00)
AM_RANGE(0xf4, 0xf7) AM_DEVREADWRITE("ctc",z80ctc_device,read,write) AM_MIRROR(0xff00)
AM_RANGE(0xf8, 0xfb) AM_DEVREADWRITE("pio",z80pio_device,read_alt,write_alt) AM_MIRROR(0xff00)
AM_RANGE(0xfc, 0xfd) AM_DEVICE("fdc",upd765a_device,map) AM_MIRROR(0xff00)
@ -993,4 +998,4 @@ ROM_START( attache )
ROM_END
/* YEAR NAME PARENT COMPAT MACHINE INPUT DEVICE INIT COMPANY FULLNAME FLAGS */
COMP( 1982, attache, 0, 0, attache, attache, driver_device, 0, "Otrona", "Attach\xC3\xA9", MACHINE_IMPERFECT_GRAPHICS|MACHINE_NOT_WORKING)
COMP( 1982, attache, 0, 0, attache, attache, driver_device, 0, "Otrona", "Attach\xC3\xA9", MACHINE_IMPERFECT_GRAPHICS)