diff options
author | hap <happppp@users.noreply.github.com> | 2017-11-15 20:08:37 +0100 |
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committer | hap <happppp@users.noreply.github.com> | 2017-11-15 20:08:37 +0100 |
commit | c059ad245f5855ecc1d07ab2c402cdce38ad4a3a (patch) | |
tree | 0146a6a3a4c7bb2f04ff785b9d18881ef99059e8 /src/mame/drivers/meyc8088.cpp | |
parent | d854ec06b1dac6585a8e290b3a5a406fe26aaa6c (diff) |
meyc8088: interrupt is auto cleared by INTA (nw)
Diffstat (limited to 'src/mame/drivers/meyc8088.cpp')
-rw-r--r-- | src/mame/drivers/meyc8088.cpp | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/src/mame/drivers/meyc8088.cpp b/src/mame/drivers/meyc8088.cpp index d4f9d65f826..6897f0bdbb3 100644 --- a/src/mame/drivers/meyc8088.cpp +++ b/src/mame/drivers/meyc8088.cpp @@ -163,8 +163,9 @@ uint32_t meyc8088_state::screen_update_meyc8088(screen_device &screen, bitmap_in WRITE_LINE_MEMBER(meyc8088_state::screen_vblank_meyc8088) { - // INTR on LC255 (pulses at start and end of vblank), INTA hardwired to $20 - m_maincpu->pulse_input_line_and_vector(0, 0x20, 1); + // LC255(200ns pulse) rising edge asserts INTR at start and end of vblank + // INTA wired back to INTR to clear it, vector is hardwired to $20 + m_maincpu->set_input_line_and_vector(0, HOLD_LINE, 0x20); } |