diff --git a/requesters/.gitignore b/requesters/.gitignore
index ba2906d..5cd626f 100644
--- a/requesters/.gitignore
+++ b/requesters/.gitignore
@@ -1 +1,3 @@
 main
+dos_compat_test
+file_list_test
diff --git a/requesters/dos_compat.c b/requesters/dos_compat.c
new file mode 100644
index 0000000..3ce684c
--- /dev/null
+++ b/requesters/dos_compat.c
@@ -0,0 +1,40 @@
+#include <stddef.h>
+#include <string.h>
+
+#include "dos_compat.h"
+
+const char *dc_PathPart(const char *path)
+{
+    if (path) {
+        int slen = strlen(path);
+        if (slen == 0) return path;
+        int i = slen - 1;
+        for (i = slen - 1; i > 0; i--) {
+            if (path[i] == '/') break;
+            if (path[i] == ':' && i < (slen - 1)) return &(path[i + 1]);
+        }
+        return &(path[i]);
+    }
+    return NULL;
+}
+
+const char *dc_FilePart(const char *path)
+{
+    if (path) {
+        int slen = strlen(path);
+        if (slen == 0) return path;
+        int i = slen - 1;
+        for (i = slen - 1; i > 0; i--) {
+            if (path[i] == '/') return &(path[i + 1]);
+            if (path[i] == ':' && i < (slen - 1)) return &(path[i + 1]);
+        }
+        return &(path[i]);
+    }
+    return NULL;
+}
+
+int dc_AddPart(char *dest_path, const char *part_to_add, int dest_size)
+{
+    if (dest_size == 0) return 0;
+    return 0;
+}
diff --git a/requesters/dos_compat.h b/requesters/dos_compat.h
new file mode 100644
index 0000000..76b3aa2
--- /dev/null
+++ b/requesters/dos_compat.h
@@ -0,0 +1,13 @@
+#pragma once
+#ifndef __DOS_COMPAT_H__
+#define __DOS_COMPAT_H__
+
+// Compatibility functions to implement 2.x functionality on 1.x systems
+
+extern const char *dc_PathPart(const char *path);
+extern const char *dc_FilePart(const char *path);
+
+extern int dc_AddPart(char *dest_path, const char *part_to_add, int dest_size);
+
+#endif /* __DOS_COMPAT_H__ */
+
diff --git a/requesters/dos_compat_test.c b/requesters/dos_compat_test.c
new file mode 100644
index 0000000..44ffe47
--- /dev/null
+++ b/requesters/dos_compat_test.c
@@ -0,0 +1,92 @@
+#include <stddef.h>
+#include <string.h>
+
+#include "chibi.h"
+#include "dos_compat.h"
+
+CHIBI_TEST(TestPathPartNull)
+{
+    chibi_assert(dc_PathPart(NULL) == NULL);
+}
+
+CHIBI_TEST(TestPathPartEmpty)
+{
+    static char path[] = "";
+    chibi_assert(dc_PathPart(path) == path);
+}
+
+CHIBI_TEST(TestPathPartVolumeOnly)
+{
+    static char path[] = "Workbench:";
+    chibi_assert(dc_PathPart(path) == path);
+}
+
+CHIBI_TEST(TestPathPartVolumeAndFile)
+{
+    static char path[] = "Workbench:file1";
+    chibi_assert(dc_PathPart(path) == &(path[10]));
+}
+
+CHIBI_TEST(TestPathPartVolumeDirAndFile)
+{
+    static char path[] = "Workbench:dir/file1";
+    chibi_assert(dc_PathPart(path) == &(path[13]));
+}
+
+CHIBI_TEST(TestFilePartNull)
+{
+    chibi_assert(dc_FilePart(NULL) == NULL);
+}
+
+CHIBI_TEST(TestFilePartEmpty)
+{
+    static char path[] = "";
+    chibi_assert(dc_FilePart(path) == path);
+}
+
+CHIBI_TEST(TestFilePartVolumeOnly)
+{
+    static char path[] = "Workbench:";
+    chibi_assert(dc_FilePart(path) == path);
+}
+
+CHIBI_TEST(TestFilePartVolumeAndFile)
+{
+    static char path[] = "Workbench:file1";
+    chibi_assert(dc_FilePart(path) == &(path[10]));
+}
+
+CHIBI_TEST(TestFilePartVolumeDirAndFile)
+{
+    static char path[] = "Workbench:dir/file1";
+    chibi_assert(dc_FilePart(path) == &(path[14]));
+}
+
+CHIBI_TEST(TestAddPartAllNull)
+{
+    chibi_assert(dc_AddPart(NULL, NULL, 0) == 0);
+}
+
+int main(int argc, char **argv)
+{
+    chibi_summary_data summary;
+    chibi_suite *suite = chibi_suite_new();
+
+    chibi_suite_add_test(suite, TestPathPartNull);
+    chibi_suite_add_test(suite, TestPathPartEmpty);
+    chibi_suite_add_test(suite, TestPathPartVolumeOnly);
+    chibi_suite_add_test(suite, TestPathPartVolumeAndFile);
+    chibi_suite_add_test(suite, TestPathPartVolumeDirAndFile);
+
+    chibi_suite_add_test(suite, TestFilePartNull);
+    chibi_suite_add_test(suite, TestFilePartEmpty);
+    chibi_suite_add_test(suite, TestFilePartVolumeOnly);
+    chibi_suite_add_test(suite, TestFilePartVolumeAndFile);
+    chibi_suite_add_test(suite, TestFilePartVolumeDirAndFile);
+
+    chibi_suite_add_test(suite, TestAddPartAllNull);
+
+    chibi_suite_run(suite, &summary);
+    chibi_suite_delete(suite);
+    return summary.num_failures;
+}
diff --git a/scrolling_tricks/cop_x.asm b/scrolling_tricks/cop_x.asm
new file mode 100644
index 0000000..a1085e7
--- /dev/null
+++ b/scrolling_tricks/cop_x.asm
@@ -0,0 +1,226 @@
+	
+	SECTION copperlist,DATA,CHIP
+
+	XDEF	_CopperList
+	XDEF	_CopFETCHMODE
+	XDEF	_CopBPLCON0
+	XDEF	_CopBPLCON1
+	XDEF	_CopBPLCON3
+	XDEF	_CopBPLMODA
+	XDEF	_CopBPLMODB
+	XDEF	_CopDIWSTART
+	XDEF	_CopDIWSTOP
+	XDEF	_CopDDFSTART
+	XDEF	_CopDDFSTOP
+	XDEF	_CopPLANE1H
+	XDEF	_CopPLANE1L
+	XDEF	_CopPLANE2H
+	XDEF	_CopPLANE2L
+	XDEF	_CopPLANE3H
+	XDEF	_CopPLANE3L
+	XDEF	_CopPLANE4H
+	XDEF	_CopPLANE4L
+	XDEF	_CopPLANE5H
+	XDEF	_CopPLANE5L
+	XDEF	_CopPLANE6H
+	XDEF	_CopPLANE6L
+	XDEF	_CopPLANE7H
+	XDEF	_CopPLANE7L
+	XDEF	_CopPLANE8H
+	XDEF	_CopPLANE8L
+	XDEF	_CopSKY
+
+_CopperList:
+	dc.w	$180,0
+
+_CopFETCHMODE:
+	dc.w	$1FC,0
+
+_CopBPLCON0:
+	dc.w	$100,0
+
+_CopBPLCON1:
+	dc.w	$102,0
+
+_CopBPLCON3:
+	dc.w	$106,0
+
+_CopBPLMODA:
+	dc.w	$108,0
+	
+_CopBPLMODB:
+	dc.w	$10A,0
+	
+_CopDIWSTART:
+	dc.w	$8e,0
+	
+_CopDIWSTOP:
+	dc.w	$90,0
+	
+_CopDDFSTART:
+	dc.w	$92,0
+	
+_CopDDFSTOP:
+	dc.w	$94,0
+
+_CopPLANE1H:
+	dc.w	$e0,0
+
+_CopPLANE1L:
+	dc.w	$e2,0
+
+_CopPLANE2H:
+	dc.w	$e4,0
+
+_CopPLANE2L:
+	dc.w	$e6,0
+
+_CopPLANE3H:
+	dc.w	$e8,0
+
+_CopPLANE3L:
+	dc.w	$ea,0
+
+_CopPLANE4H:
+	dc.w	$ec,0
+
+_CopPLANE4L:
+	dc.w	$ee,0
+
+_CopPLANE5H:
+	dc.w	$f0,0
+
+_CopPLANE5L:
+	dc.w	$f2,0
+
+_CopPLANE6H:
+	dc.w	$f4,0
+
+_CopPLANE6L:
+	dc.w	$f6,0
+
+_CopPLANE7H:
+	dc.w	$f8,0
+
+_CopPLANE7L:
+	dc.w	$fa,0
+
+_CopPLANE8H:
+	dc.w	$fc,0
+
+_CopPLANE8L:
+	dc.w	$fe,0
+
+_CopSKY:
+	dc.w	-1,-2
+	dc.w	$180,$FFF
+
+	dc.w	$390f,-2
+	dc.w	$180,$EEF
+	dc.w	$3A0f,-2
+	dc.w	$180,$FFF
+	dc.w	$3B0f,-2
+	dc.w	$180,$EEF
+
+	dc.w	$490f,-2
+	dc.w	$180,$DDF
+	dc.w	$4a0f,-2
+	dc.w	$180,$EEF
+	dc.w	$4b0f,-2
+	dc.w	$180,$DDF
+
+	dc.w	$590f,-2
+	dc.w	$180,$CCF
+	dc.w	$5A0f,-2
+	dc.w	$180,$DDF
+	dc.w	$5B0f,-2
+	dc.w	$180,$CCF
+
+	dc.w	$690f,-2
+	dc.w	$180,$BBF
+	dc.w	$6A0f,-2
+	dc.w	$180,$CCF
+	dc.w	$6B0f,-2
+	dc.w	$180,$BBF
+
+	dc.w	$790f,-2
+	dc.w	$180,$AAF
+	dc.w	$7A0f,-2
+	dc.w	$180,$BBF
+	dc.w	$7B0f,-2
+	dc.w	$180,$AAF
+
+	dc.w	$890f,-2
+	dc.w	$180,$99E
+	dc.w	$8A0f,-2
+	dc.w	$180,$AAF
+	dc.w	$8B0f,-2
+	dc.w	$180,$99E
+
+	dc.w	$990f,-2
+	dc.w	$180,$88E
+	dc.w	$9A0f,-2
+	dc.w	$180,$99E
+	dc.w	$9B0f,-2
+	dc.w	$180,$88E
+
+	dc.w	$A90f,-2
+	dc.w	$180,$77E
+	dc.w	$AA0f,-2
+	dc.w	$180,$88E
+	dc.w	$AB0f,-2
+	dc.w	$180,$77E
+
+	dc.w	$B90f,-2
+	dc.w	$180,$66E
+	dc.w	$BA0f,-2
+	dc.w	$180,$77E
+	dc.w	$BB0f,-2
+	dc.w	$180,$66E
+
+	dc.w	$C90f,-2
+	dc.w	$180,$55D
+	dc.w	$CA0f,-2
+	dc.w	$180,$66E
+	dc.w	$CB0f,-2
+	dc.w	$180,$55D
+
+	dc.w	$D90f,-2
+	dc.w	$180,$44D
+	dc.w	$DA0f,-2
+	dc.w	$180,$55D
+	dc.w	$DB0f,-2
+	dc.w	$180,$44D
+
+	dc.w	$E90f,-2
+	dc.w	$180,$33D
+	dc.w	$EA0f,-2
+	dc.w	$180,$44D
+	dc.w	$EB0f,-2
+	dc.w	$180,$33D
+
+	dc.w	$F90f,-2
+	dc.w	$180,$22C
+	dc.w	$FA0f,-2
+	dc.w	$180,$33D
+	dc.w	$FB0f,-2
+	dc.w	$180,$22C
+
+	dc.w	$FFDF,-2
+	dc.w	$090F,-2
+	dc.w	$180,$11C
+	dc.w	$0A0F,-2
+	dc.w	$180,$22C
+	dc.w	$0B0F,-2
+	dc.w	$180,$11C
+
+	dc.w	$190f,-2
+	dc.w	$180,$00B
+	dc.w	$1A0f,-2
+	dc.w	$180,$11C
+	dc.w	$1B0f,-2
+	dc.w	$180,$00B
+
+	dc.w	-1,-2
+	END
+
diff --git a/scrolling_tricks/cop_x.h b/scrolling_tricks/cop_x.h
new file mode 100644
index 0000000..4b392b7
--- /dev/null
+++ b/scrolling_tricks/cop_x.h
@@ -0,0 +1,29 @@
+extern WORD	CopperList[];
+extern WORD CopFETCHMODE[];
+extern WORD CopBPLCON0[];
+extern WORD	CopBPLCON1[];
+extern WORD CopBPLCON3[];
+extern WORD CopBPLMODA[];
+extern WORD CopBPLMODB[];
+extern WORD CopDIWSTART[];
+extern WORD CopDIWSTOP[];
+extern WORD CopDDFSTART[];
+extern WORD CopDDFSTOP[];
+extern WORD CopPLANE1H[];
+extern WORD CopPLANE1L[];
+extern WORD CopPLANE2H[];
+extern WORD CopPLANE2L[];
+extern WORD CopPLANE3H[];
+extern WORD CopPLANE3L[];
+extern WORD CopPLANE4H[];
+extern WORD CopPLANE4L[];
+extern WORD CopPLANE5H[];
+extern WORD CopPLANE5L[];
+extern WORD CopPLANE6H[];
+extern WORD CopPLANE6L[];
+extern WORD CopPLANE7H[];
+extern WORD CopPLANE7L[];
+extern WORD CopPLANE8H[];
+extern WORD CopPLANE8L[];
+extern WORD CopSKY[];
+