rb6502

static INPUT_PORTS_START( downhill )
	PORT_START("P1")
	PORT_BIT( 0xfff, IP_ACTIVE_LOW, IPT_UNKNOWN )

	PORT_START("P2")
	PORT_BIT( 0xfff, IP_ACTIVE_LOW, IPT_UNKNOWN )   // 0x100 = freeze?

	PORT_START("IN01")
	PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_BUTTON3)		// brake left
	PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_START1)		// start

rb6502

diff --git a/src/devices/machine/ncr5390.cpp b/src/devices/machine/ncr5390.cpp
index 7a52d237982..76a135e20b5 100644
--- a/src/devices/machine/ncr5390.cpp
+++ b/src/devices/machine/ncr5390.cpp
@@ -421,7 +421,10 @@ void ncr5390_device::step(bool timeout)
 			break;
 
 		if((state & STATE_MASK) != INIT_XFR_RECV_PAD)
+		{
 			fifo_push(scsi_bus->data_r());

rb6502

diff --git a/3rdparty/bgfx/src/renderer_mtl.mm b/3rdparty/bgfx/src/renderer_mtl.mm
index 2317c16d6b5..7d97f1c5d78 100644
--- a/3rdparty/bgfx/src/renderer_mtl.mm
+++ b/3rdparty/bgfx/src/renderer_mtl.mm
@@ -14,6 +14,12 @@
 #      include <Cocoa/Cocoa.h>
 #endif
 
+#if defined(__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ >= 110000
+#undef OLD_MACOS

rb6502

diff --git a/3rdparty/bgfx/src/renderer_mtl.mm b/3rdparty/bgfx/src/renderer_mtl.mm
index 2317c16d6b5..27dccdbd7bc 100644
--- a/3rdparty/bgfx/src/renderer_mtl.mm
+++ b/3rdparty/bgfx/src/renderer_mtl.mm
@@ -14,6 +14,12 @@
 #	include <Cocoa/Cocoa.h>
 #endif
 
+#if defined(__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ >= 110000
+#undef OLD_MACOS

rb6502

diff --git a/3rdparty/bgfx/src/renderer_mtl.mm b/3rdparty/bgfx/src/renderer_mtl.mm
index 2317c16d6b5..db81e227290 100644
--- a/3rdparty/bgfx/src/renderer_mtl.mm
+++ b/3rdparty/bgfx/src/renderer_mtl.mm
@@ -14,6 +14,12 @@
 #	include <Cocoa/Cocoa.h>
 #endif
 
+#if defined(__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ >= 110000
+#undef OLD_MACOS

rb6502

diff --git a/3rdparty/bgfx/src/renderer_mtl.mm b/3rdparty/bgfx/src/renderer_mtl.mm
index 2317c16d6b5..1157c233f40 100644
--- a/3rdparty/bgfx/src/renderer_mtl.mm
+++ b/3rdparty/bgfx/src/renderer_mtl.mm
@@ -14,6 +14,12 @@
 #	include <Cocoa/Cocoa.h>
 #endif
 
+#if defined(__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ >= 110000
+#undef OLD_MACOS

rb6502

MAME SuperH core audit — instruction semantics (results & flags)

Date: 2026-08-06 Scope: src/devices/cpu/sh/ — interpreter and DRC, SH-1/SH-2/SH-3/SH-4. Only instruction behaviour (computed results, T/Q/M/S flags, register writeback) was in scope for this pass. Exceptions, MMU, TLB, interrupt delivery, and peripherals were deliberately not audited except where they change an instruction's result.

References used (all from /Volumes/data/EmuDocs/SH/):

• sh2.pdf — SH-1/SH-2/SH-DSP Software Manual rev 5.00

rb6502

// license:BSD-3-Clause
// copyright-holders:Scott Stone
/************************************************************************

    NEXUS 3D Version 1.0 Board from Interpark

    Games on this platform:

    Arcana Heart FULL, Examu Inc, 2006

rb6502

System Board Y2 ROM research

Research date: 2026-09-06 UTC. No MAME source or original ROM was modified.

Result

The NAND scrambling is recovered for kof2002um, kof2002umj, and higurashi. The decoded software is little-endian MIPS, targeting NEC VR5500 / MIPS IV, not SH-4. Both the first-stage loader and the actual game executables establish this independently.

The graphics software exposes a Yatagarasu-specific rendering / geometry / video-output interface. Its register layout and command construction are different from Dreamcast's PVR2 interface. This research does not establish the provenance of every underlying graphics IP block; it does establish that using the Naomi/Atomiswave machine model as the starting assumption would be misleading.