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ef9345: implement service row for the TS9347 variant (#13225)

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With this change, the minitel2 can correctly display its status
row at the top of the screen.
This commit is contained in:
Fabio D'Urso 2025-01-17 15:43:18 +01:00 committed by GitHub
parent 08234042ac
commit 835630cc7a
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1 changed files with 17 additions and 1 deletions
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18
src/devices/video/ef9345.cpp
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@ -378,7 +378,23 @@ void ef9345_device::zoom(uint8_t *pix, uint16_t n)
uint16_t ef9345_device::indexblock(uint16_t x, uint16_t y)
{
uint16_t i = x, j;
j = (y == 0) ? ((m_tgs & 0x20) >> 5) : ((m_ror & 0x1f) + y - 1);
if (m_variant == EF9345_MODE::TYPE_EF9345)
{
// On the EF9345 the service row is always displayed at the top, and
// it can be fetched from either Y=0 or Y=1.
j = (y == 0) ? ((m_tgs & 0x20) >> 5) : ((m_ror & 0x1f) + y - 1);
}
else
{
// On the TS9347 the service row is displayed either at the top or at
// the bottom, and it is always fetched from Y=0.
if (m_tgs & 1)
j = (y == 24) ? 0 : ((m_ror & 0x1f) + y);
else
j = (y == 0) ? 0 : ((m_ror & 0x1f) + y - 1);
}
j = (j > 31) ? (j - 24) : j;
//right side of a double width character