Added the beginning of a HELP implementation

exper/helpcom/Makefile

@@ -0,0 +1,31 @@
+# Copyright 2024 S. V. Nickolas.
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the Software), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in
+# all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT,TORT OR OTHERWISE, ARISING FROM,
+# OUT OF, OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+# THE SOFTWARE.
+
+help.com:	main.o tty.o
+	wcl -fe=help.com -mt main.o tty.o
+
+main.o:	main.c extern.h messages.h
+	wcl -c -fo=main.o main.c
+
+tty.o:	tty.c extern.h
+	wcl -c -fo=tty.o tty.c
+
+clean:
+	rm -f help.com main.o tty.o

exper/helpcom/extern.h

@@ -0,0 +1,67 @@
+/*
+ * Copyright 2024 S. V. Nickolas.
+ * 
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the Software), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF, OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef _H_EXTERN_
+#define _H_EXTERN_
+#include <stdint.h>
+
+#define HELP_VERSION "0.05"
+
+#ifndef HELPFILE
+#define HELPFILE "help.htx"
+#endif
+
+#ifndef HELPTOC
+#define HELPTOC  "cmdcontents"
+#endif
+
+#define LNBUFSZ  256
+#define PGBUFSZ  32768
+#define MAXLINS  1024
+
+typedef struct mos_stat {
+ uint16_t btnmask;
+ uint16_t x;
+ uint16_t y;
+} MOS_STAT;
+
+#define MOS_LEFT   0x01
+#define MOS_RIGHT  0x02
+#define MOS_CENTER 0x04
+
+int       mos_check    (void);
+void      mos_csron    (void);
+void      mos_csroff   (void);
+void      mos_read     (MOS_STAT *p);
+void      mos_move     (uint16_t x, uint16_t y);
+uint8_t   vid_setmode  (uint8_t mode);
+void      vid_gotoxy   (uint8_t x, uint8_t y);
+void      vid_wrstrat  (uint8_t *s, uint8_t x, uint8_t y, int c);
+void      vid_wrchrat  (uint8_t k, uint8_t x, uint8_t y, uint8_t c);
+uint16_t  key_read     (void);
+int32_t   key_poll     (void);
+
+extern int gotmouse;
+extern uint16_t vidseg;
+
+#endif /* _H_EXTERN_ */
+