From 51b4b5551d4fd3ff40ed6c4ff72b8f91622a92b3 Mon Sep 17 00:00:00 2001 From: Thomas Harte Date: Thu, 24 Oct 2019 22:37:53 -0400 Subject: [PATCH] Actually, I think the 6850 is active low for interrupts. --- Machines/AtariST/AtariST.cpp | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/Machines/AtariST/AtariST.cpp b/Machines/AtariST/AtariST.cpp index 22c88d285..516f4c71e 100644 --- a/Machines/AtariST/AtariST.cpp +++ b/Machines/AtariST/AtariST.cpp @@ -609,7 +609,7 @@ class ConcreteMachine: */ mfp_->set_port_input( 0x80 | - ((keyboard_acia_->get_interrupt_line() || midi_acia_->get_interrupt_line()) ? 0x10 : 0x00) + ((keyboard_acia_->get_interrupt_line() || midi_acia_->get_interrupt_line()) ? 0x0 : 0x10) // Interrupts are active low. ); } };