diff options
| author | Ben Burwell <ben@benburwell.com> | 2015-04-01 20:01:07 -0400 |
|---|---|---|
| committer | Ben Burwell <ben@benburwell.com> | 2015-04-01 20:01:07 -0400 |
| commit | 7b0995ea20afed2632893f8528ce9d57772d5498 (patch) | |
| tree | 8327ceb84ebd59403a8596c8d790c3b127308d97 /mpx.h | |
as of 2013-09-192013-09-19
Diffstat (limited to 'mpx.h')
| -rw-r--r-- | mpx.h | 64 |
1 files changed, 64 insertions, 0 deletions
@@ -0,0 +1,64 @@ +/*
+ * file: mpx.h
+ *
+ * Header file for the MPX Operating System.
+ *
+ * This file contains constant, structure and function
+ * prototypes for the MPX Operating System
+ */
+
+/* MPX System request numbers. */
+
+#define EXIT_CODE 0 /* Process requesting termination. code. */
+#define CON 1 /* The console device - keyboard & monitor. */
+#define PRT 2 /* The printer device - LPT1. */
+#define COM 3 /* The serial port - COM1. */
+
+/* MPX System request types. */
+
+#define READ 0 /* Read from device. */
+#define WRITE 1 /* Write to device. */
+#define WAIT 2 /* Semaphore P operation for device. */
+#define SIGNAL 3 /* Semaphore V operation for device. */
+
+
+#define MAXSIZE 20 /* Size of the directory array. */
+
+struct dirstruct { /* Data type for a directory entry. */
+ char dirnam[9]; /* The name of a .mpx file. */
+ int dirsiz; /* The size of the file (in bytes). */
+};
+
+typedef struct dirstruct dir; /* Use dir as the data typer name. */
+
+/* Function prototypes. */
+
+/* main.c */
+int main(void);
+
+/* comhan.c */
+void comhan(void); /* The MPX/OS command handler. */
+int get_cmd(char args[]);
+void cmd_version(void);
+void cmd_date(char *[]);
+void cmd_directory(void);
+void cmd_stop(void);
+void cmd_help(char *[]);
+void cmd_prompt(char *[]);
+void cmd_alias(char *[]);
+void sys_req(int,int,char *,int *); /* MPX system request function. */
+int directory(dir *, int); /* Support function to load the */
+ /* directory array. */
+
+/*
+ * Global variable EXTERN directives.
+ *
+ * These extern declarations allow the variables to be
+ * accessed from any source code file which includes
+ * this header file. The memory space for the variables
+ * is declared in a *.c file.
+ */
+#define DIR_SIZE 20
+
+extern dir direct[]; /* Array of directory entries - see direct.c */
+extern int directory(dir *direct, int dir_size);
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