From f6f7964f819d67d3d323fb9fc8c0c8587de3412d Mon Sep 17 00:00:00 2001
From: Kelvin Sherlock <ksherlock@gmail.com>
Date: Sun, 14 Dec 2014 19:52:08 -0500
Subject: [PATCH] OSDispatch call

---
 toolbox/mm.cpp      | 21 +++++++++++++++++++++
 toolbox/mm.h        |  4 ++++
 toolbox/toolbox.cpp | 27 +++++++++++++++++++++++++++
 3 files changed, 52 insertions(+)

diff --git a/toolbox/mm.cpp b/toolbox/mm.cpp
index d7ff43d..4069dd5 100644
--- a/toolbox/mm.cpp
+++ b/toolbox/mm.cpp
@@ -40,6 +40,8 @@
 #include <macos/sysequ.h>
 #include <macos/errors.h>
 
+#include "stackframe.h"
+
 using ToolBox::Log;
 
 namespace 
@@ -1485,4 +1487,23 @@ namespace MM
 		 cpuSetAReg(0, mplite_maxmem(&pool));
 		 return mplite_freemem(&pool);
 	}
+
+	uint16_t TempMaxMem(void)
+	{
+		// FUNCTION TempMaxMem (VAR grow: Size): Size;
+
+		uint32_t address;
+
+		uint32_t sp = StackFrame<4>(address);
+
+		Log("     TempMaxMem(%08x)\n", address);
+
+		if (address) memoryWriteLong(0, address);
+
+		ToolReturn<4>(sp, mplite_maxmem(&pool));
+		SetMemError(0); // not sure if this is correct.  oh well.
+
+		return 0;
+	}
+
 }
diff --git a/toolbox/mm.h b/toolbox/mm.h
index 725b3fd..e15a728 100644
--- a/toolbox/mm.h
+++ b/toolbox/mm.h
@@ -84,6 +84,10 @@ namespace MM
 	uint16_t SetZone(uint16_t trap);
 
 	uint16_t MaxApplZone(uint16_t trap);
+
+	// OS Dispatch
+
+	uint16_t TempMaxMem(void);
 }
 
 
diff --git a/toolbox/toolbox.cpp b/toolbox/toolbox.cpp
index fe7657f..6ba6ffb 100644
--- a/toolbox/toolbox.cpp
+++ b/toolbox/toolbox.cpp
@@ -42,6 +42,8 @@
 #include "utility.h"
 #include "loader.h"
 #include "macos/traps.h"
+#include "stackframe.h"
+
 // yuck.  TST.W d0
 extern "C" void cpuSetFlagsNZ00NewW(UWO res);
 
@@ -50,6 +52,27 @@ namespace ToolBox {
 	bool Trace = false;
 
 
+	uint16_t OSDispatch(uint16_t trap)
+	{
+		uint16_t selector;
+
+
+		StackFrame<2>(selector);
+		Log("%04x OSDispatch(%04x)\n", trap, selector);
+
+		switch(selector)
+		{
+			case 0x0015:
+				return MM::TempMaxMem();
+
+			default:
+				fprintf(stderr, "OSDispatch: selector %04x not implemented\n", 
+					selector);
+				exit(1);			
+		}
+
+	}
+
 	void dispatch(uint16_t trap)
 	{
 		// todo -- check/remove extra bits for save a0, toolglue, etc.
@@ -522,6 +545,10 @@ namespace ToolBox {
 				d0 = Utility::BitTst(trap);
 				break;
 
+			case 0xa88f:
+				d0 = OSDispatch(trap);
+				break;
+
 			default:
 				fprintf(stderr, "Unsupported tool trap: %04x (%s)\n",
 						trap, TrapName(trap));