diff --git a/project/headers.mk b/project/headers.mk
index 6ce37e4..98ecdf5 100644
--- a/project/headers.mk
+++ b/project/headers.mk
@@ -7,6 +7,7 @@ INTERNAL_HEADERS = \
 	$(PROJECT_DIR)/src/internal/gdi/gdi.h \
 	$(PROJECT_DIR)/src/internal/gdi/gdi_system.h \
 	$(PROJECT_DIR)/src/internal/gdi/gdi_window.h \
+	$(PROJECT_DIR)/src/internal/$(PACKAGE)_bridge_impl.h \
 	$(PROJECT_DIR)/src/internal/$(PACKAGE)_driver_impl.h \
 	$(PROJECT_DIR)/src/internal/$(PACKAGE)_init_impl.h \
 	$(PROJECT_DIR)/src/internal/$(PACKAGE)_ioctl_impl.h \
diff --git a/src/internal/ptycon_bridge_impl.h b/src/internal/ptycon_bridge_impl.h
new file mode 100644
index 0000000..b70497e
--- /dev/null
+++ b/src/internal/ptycon_bridge_impl.h
@@ -0,0 +1,55 @@
+#ifndef PTYCON_BRIDGE_IMPL_H
+#define PTYCON_BRIDGE_IMPL_H
+
+#include <psxtypes/psxtypes.h>
+
+enum ptyc_ctrl_state {
+	PTYC_CTRL_STATE_ESI,
+	PTYC_CTRL_STATE_PARAM_HANDLERS,
+	PTYC_CTRL_STATE_COMMAND_HANDLERS,
+	PTYC_CTRL_STATE_CAP
+};
+
+#define PTYC_BUFFER_ELEMENTS	0x8000
+#define PTYC_CTRL_PARAMS	0x20
+
+#define PTYC_ESI_ARRAY_SIZE	0x5F
+#define PTYC_CSI_ARRAY_SIZE	0x6F
+#define PTYC_SGR_ARRAY_SIZE	0x6D
+
+
+struct ptyc_term_data {
+	unsigned char	in	[PTYC_BUFFER_ELEMENTS];
+	wchar16_t	out	[PTYC_BUFFER_ELEMENTS];
+	wchar16_t	screen	[PTYC_BUFFER_ELEMENTS];
+};
+
+struct ptyc_term_ctx;
+
+typedef void * __fastcall ptyc_term_handler (struct ptyc_term_ctx *);
+
+struct ptyc_term_ctx {
+	void *				hin;
+	void *				hout;
+	wchar16_t *			wch_pty;
+	wchar16_t *			wch_con;
+	unsigned char *			ctrl;
+	uint32_t			ctrl_cap;
+	uint32_t *			ctrl_mark;
+	uint32_t			ctrl_state;
+	uint32_t *			ctrl_param;
+	uint32_t			ctrl_params[PTYC_CTRL_PARAMS];
+	ptyc_term_handler *		handler;
+	ptyc_term_handler *		char_handler;
+	ptyc_term_handler *		ctrl_handler;
+	ptyc_term_handler * const *	ctrl_handlers[PTYC_CTRL_STATE_CAP];
+	ptyc_term_handler *		ctrl_command;
+	struct ptyc_term_data		data;
+};
+
+extern ptyc_term_handler * const ptyc_esi_handlers[];
+extern ptyc_term_handler * const ptyc_cmd_handlers[];
+extern ptyc_term_handler * const ptyc_csi_handlers[];
+extern ptyc_term_handler * const ptyc_sgr_handlers[];
+
+#endif
diff --git a/src/internal/ptycon_driver_impl.h b/src/internal/ptycon_driver_impl.h
index 22b4409..13a2e35 100644
--- a/src/internal/ptycon_driver_impl.h
+++ b/src/internal/ptycon_driver_impl.h
@@ -9,6 +9,7 @@
 #include <stdio.h>
 
 #include <ptycon/ptycon.h>
+#include "ptycon_bridge_impl.h"
 #include "argv/argv.h"
 
 extern   const struct argv_option ptyc_default_options[];
@@ -28,11 +29,6 @@ enum app_tags {
 	TAG_WAIT,
 };
 
-struct ptyc_term_ctx {
-	void *			hin;
-	void *			hout;
-};
-
 struct ptyc_loop_ctx {
 	nt_thread_params	treader;
 	nt_thread_params	twriter;