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Implemented MC6845 row/column addressing mode. [Curt Coder]

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This commit is contained in:
Curt Coder 2011-03-06 14:20:41 +00:00
parent b9d8a73363
commit 5440a02709
1 changed files with 12 additions and 1 deletions
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11
src/emu/video/mc6845.c
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@ -837,7 +837,18 @@ void mc6845_update(device_t *device, bitmap_t *bitmap, const rectangle *cliprect
INT8 cursor_x = cursor_visible ? (mc6845->cursor_addr - mc6845->current_disp_addr) : -1;
/* call the external system to draw it */
if (MODE_ROW_COLUMN_ADDRESSING(mc6845))
{
UINT8 cc = 0;
UINT8 cr = y / (mc6845->max_ras_addr + 1);
UINT16 ma = (cr << 8) | cc;
mc6845->intf->update_row(device, bitmap, cliprect, ma, ra, y, mc6845->horiz_disp, cursor_x, param);
}
else
{
mc6845->intf->update_row(device, bitmap, cliprect, mc6845->current_disp_addr, ra, y, mc6845->horiz_disp, cursor_x, param);
}
/* update MA if the last raster address */
if (ra == mc6845->max_ras_addr)