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approximate the Osborne 1 SCREEN-PAC pseudo 80 column mode

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This commit is contained in:
Vas Crabb 2015-10-27 18:01:24 +11:00
parent 384fdb4f1d
commit ed6e720c20
1 changed files with 1 additions and 1 deletions
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src/mame/machine/osborne1.c
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@ -363,7 +363,7 @@ TIMER_CALLBACK_MEMBER(osborne1_state::osborne1_video_callback)
/* Draw a line of the display */
bool const hires = m_screen_pac & m_resolution;
UINT16 const row = (m_new_start_y + (y/10)) * 128 & 0xF80;
UINT16 const col = (m_new_start_x & (hires ? 0x60 : 0x7F));
UINT16 const col = (m_new_start_x & (hires ? 0x60 : 0x7F)) - ((hires && m_hc_left) ? 8 : 0);
UINT16 *p = &m_bitmap.pix16(y);
for ( UINT16 x = 0; x < ((m_screen_pac && m_resolution) ? 104 : 52); x++ )