From 19733ba72b9b0ab36715250cf2ad6f2bc0c4765f Mon Sep 17 00:00:00 2001
From: Daniel Loffgren <daniel@loffgren.org>
Date: Mon, 14 Sep 2015 00:24:03 +0000
Subject: [PATCH] Some very basic PIA functionality

git-svn-id: svn+ssh://svn.phoenixbox.net/svn/apple1/trunk@5 64f78de7-aa59-e511-a0e8-0002a5492df0
---
 apple1.xcodeproj/project.pbxproj |  6 ++++++
 apple1/pia.c                     | 30 ++++++++++++++++++++++++++++++
 apple1/pia.h                     | 22 ++++++++++++++++++++++
 3 files changed, 58 insertions(+)
 create mode 100644 apple1/pia.c
 create mode 100644 apple1/pia.h

diff --git a/apple1.xcodeproj/project.pbxproj b/apple1.xcodeproj/project.pbxproj
index 14e2a05..442b703 100644
--- a/apple1.xcodeproj/project.pbxproj
+++ b/apple1.xcodeproj/project.pbxproj
@@ -9,6 +9,7 @@
 /* Begin PBXBuildFile section */
 		E668389E1BA4F51E008F0F06 /* main.c in Sources */ = {isa = PBXBuildFile; fileRef = E668389D1BA4F51E008F0F06 /* main.c */; };
 		E66839001BA4F75C008F0F06 /* liblibv6502.a in Frameworks */ = {isa = PBXBuildFile; fileRef = E66838F61BA4F705008F0F06 /* liblibv6502.a */; };
+		E66839061BA53A82008F0F06 /* pia.c in Sources */ = {isa = PBXBuildFile; fileRef = E66839041BA53A82008F0F06 /* pia.c */; };
 /* End PBXBuildFile section */
 
 /* Begin PBXContainerItemProxy section */
@@ -114,6 +115,8 @@
 		E668389A1BA4F51E008F0F06 /* apple1 */ = {isa = PBXFileReference; explicitFileType = "compiled.mach-o.executable"; includeInIndex = 0; path = apple1; sourceTree = BUILT_PRODUCTS_DIR; };
 		E668389D1BA4F51E008F0F06 /* main.c */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.c; path = main.c; sourceTree = "<group>"; };
 		E66838D31BA4F705008F0F06 /* v6502.xcodeproj */ = {isa = PBXFileReference; lastKnownFileType = "wrapper.pb-project"; name = v6502.xcodeproj; path = v6502/v6502.xcodeproj; sourceTree = SOURCE_ROOT; };
+		E66839041BA53A82008F0F06 /* pia.c */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.c; path = pia.c; sourceTree = "<group>"; };
+		E66839051BA53A82008F0F06 /* pia.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = pia.h; sourceTree = "<group>"; };
 /* End PBXFileReference section */
 
 /* Begin PBXFrameworksBuildPhase section */
@@ -149,6 +152,8 @@
 			isa = PBXGroup;
 			children = (
 				E668389D1BA4F51E008F0F06 /* main.c */,
+				E66839041BA53A82008F0F06 /* pia.c */,
+				E66839051BA53A82008F0F06 /* pia.h */,
 			);
 			path = apple1;
 			sourceTree = "<group>";
@@ -322,6 +327,7 @@
 			isa = PBXSourcesBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
+				E66839061BA53A82008F0F06 /* pia.c in Sources */,
 				E668389E1BA4F51E008F0F06 /* main.c in Sources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
diff --git a/apple1/pia.c b/apple1/pia.c
new file mode 100644
index 0000000..1ac78ac
--- /dev/null
+++ b/apple1/pia.c
@@ -0,0 +1,30 @@
+//
+//  pia.c
+//  apple1
+//
+//  Created by Daniel Loffgren on 9/12/15.
+//  Copyright (c) 2015 Daniel Loffgren. All rights reserved.
+//
+
+#include "pia.h"
+#include <stdio.h>
+#include <as6502/color.h>
+
+#define FIXME_I_SHOULDNT_BE_NULL NULL
+
+void videoWriteCharCallback(struct _v6502_memory *memory, uint16_t offset, uint8_t value, void *context) {
+	fprintf(stdout, ANSI_COLOR_BRIGHT_GREEN "%c" ANSI_COLOR_RESET, value);
+	fflush(stdout);
+}
+
+void videoWriteNewlineCallback(struct _v6502_memory *memory, uint16_t offset, uint8_t value, void *context) {
+	fprintf(stdout, ANSI_COLOR_BRIGHT_GREEN "\n" ANSI_COLOR_RESET);
+	fflush(stdout);
+}
+
+void pia_map(v6502_memory *mem) {
+	v6502_map(mem, A1PIA_KEYBOARD_INPUT, 1, FIXME_I_SHOULDNT_BE_NULL, NULL, NULL);
+	v6502_map(mem, A1PIA_KEYBOARD_CRLF_REG, 1, FIXME_I_SHOULDNT_BE_NULL, NULL, NULL);
+	v6502_map(mem, A1PIA_VIDEO_OUTPUT, 1, FIXME_I_SHOULDNT_BE_NULL, videoWriteCharCallback, NULL);
+	v6502_map(mem, A1PIA_VIDEO_CRLF_REG, 1, FIXME_I_SHOULDNT_BE_NULL, videoWriteNewlineCallback, NULL);
+}
\ No newline at end of file
diff --git a/apple1/pia.h b/apple1/pia.h
new file mode 100644
index 0000000..fc43e4e
--- /dev/null
+++ b/apple1/pia.h
@@ -0,0 +1,22 @@
+//
+//  pia.h
+//  apple1
+//
+//  Created by Daniel Loffgren on 9/12/15.
+//  Copyright (c) 2015 Daniel Loffgren. All rights reserved.
+//
+
+#ifndef __apple1__pia__
+#define __apple1__pia__
+
+#include <v6502/mem.h>
+
+#define A1PIA_KEYBOARD_INPUT	0xD010
+#define A1PIA_KEYBOARD_CRLF_REG	0xD011
+#define A1PIA_VIDEO_OUTPUT		0xD012
+#define A1PIA_VIDEO_CRLF_REG	0xD013
+
+// Assumes stdin/stdout
+void pia_map(v6502_memory *mem);
+
+#endif /* defined(__apple1__pia__) */