# HG changeset patch
# User Michael Pavone <pavone@retrodev.com>
# Date 1420350881 28800
# Node ID 687c1dd3bcb94c2edb773e4271cc4342c52e922e
# Parent  41a399c11ef1b3567069be1b88b73fc2a2cc8759
Fake busack when Z80 is disabled

diff -r 41a399c11ef1 -r 687c1dd3bcb9 blastem.c
--- a/blastem.c	Sat Jan 03 21:35:23 2015 -0800
+++ b/blastem.c	Sat Jan 03 21:54:41 2015 -0800
@@ -514,6 +514,8 @@
 					dputs("bus requesting Z80");
 					if (z80_enabled) {
 						z80_assert_busreq(gen->z80, context->current_cycle);
+					} else {
+						gen->z80->busack = 1;
 					}
 				} else {
 					if (gen->z80->busreq) {
@@ -528,6 +530,8 @@
 					}
 					if (z80_enabled) {
 						z80_clear_busreq(gen->z80, context->current_cycle);
+					} else {
+						gen->z80->busack = 0;
 					}
 				}
 			} else if (location == 0x1200) {
@@ -616,7 +620,7 @@
 			}
 		} else {
 			if (location == 0x1100) {
-				value = z80_enabled ? !z80_get_busack(gen->z80, context->current_cycle) : 0;
+				value = z80_enabled ? !z80_get_busack(gen->z80, context->current_cycle) : !gen->z80->busack;
 				dprintf("Byte read of BUSREQ returned %d @ %d (reset: %d)\n", value, context->current_cycle, gen->z80->reset);
 			} else if (location == 0x1200) {
 				value = !gen->z80->reset;