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meyc8088: interrupt is auto cleared by INTA (nw)

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hap 2017-11-15 20:08:37 +01:00
parent d854ec06b1
commit c059ad245f
1 changed files with 3 additions and 2 deletions
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5
src/mame/drivers/meyc8088.cpp
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@ -163,8 +163,9 @@ uint32_t meyc8088_state::screen_update_meyc8088(screen_device &screen, bitmap_in
WRITE_LINE_MEMBER(meyc8088_state::screen_vblank_meyc8088) WRITE_LINE_MEMBER(meyc8088_state::screen_vblank_meyc8088)
{ {
// INTR on LC255 (pulses at start and end of vblank), INTA hardwired to $20 // LC255(200ns pulse) rising edge asserts INTR at start and end of vblank
m_maincpu->pulse_input_line_and_vector(0, 0x20, 1); // INTA wired back to INTR to clear it, vector is hardwired to $20
m_maincpu->set_input_line_and_vector(0, HOLD_LINE, 0x20);
} }