/* Thanks to Alex Russell for example code */
-/* Thanks to Gary Neal for example code */\r
-#include "src\lib\dos_comm.h"
+/* Thanks to Gary Neal for example code */
+#include "dos_kb.h"
// keyboard buffer
static byte key[NUM_SCANCODES]; // pressed
static byte kea[NUM_SCANCODES]; // released
-#ifdef __cplusplus /* Function must be declared C style */\r
-extern "C" {\r
+#ifdef __cplusplus /* Function must be declared C style */
+extern "C" {
#endif
static void interrupt (far *oldkb)(void) = NULL; /* BIOS keyboard handler */
-#ifdef __cplusplus\r
-}\r
-#endif\r
-/*****************NEW KEYBOARD 09h ISR***********************/\r
+#ifdef __cplusplus
+}
+#endif
+
+/*
+ * Comment out the following #define if you don't want the testing main()
+ * to be included.
+ */
+//#define TESTING
+#define TESTING2
+
+/*****************NEW KEYBOARD 09h ISR***********************/
void interrupt newkb(void){
byte kee;
- register char qx;\r
+ register char qx;
kee = inp(0x60); /* Read the keyboard scan code */
- /* Clear keyboard controller on XT machines */\r
- qx = inp(0x61); /* Get keyboard control register */\r
- qx |= 0x82;\r
- outp(0x61, qx); /* Toggle acknowledge bit high */\r
- qx &= 0x7F;\r
- outp(0x61, qx); /* Toggle acknowledge bit low */
+ /* Clear keyboard controller on XT machines */
+ qx = inp(0x61); /* Get keyboard control register */
+ qx |= 0x82;
+ outp(0x61, qx); /* Toggle acknowledge bit high */
+ qx &= 0x7F;
+ outp(0x61, qx); /* Toggle acknowledge bit low */
/* Interpret the scan code and set our flags */
-//tt
- printf("%d[%d]\n",kee,key[kee]);
- if(kee & 0x80)\r
- key[kee & 0x7F] = 0; // a key is released\r
- else\r
+ #ifdef TESTING2
+ //printf("%d[%d]\n",kee,key[kee]);
+ printf("\0"); // bug
+ #endif
+ if(kee & 0x80)
+ key[kee & 0x7F] = 0; // a key is released
+ else
key[kee] = kea[kee] = 1; // a key is pressed
- /* Acknowledge the interrupt to the programmable interrupt controller */\r
- outp(0x20, 0x20); /* Signal non specific end of interrupt */\r
-}\r
-\r
-/* ---------------------- init_keyboard() ---------------- April 17,1993 */\r
-/* restore the bios keyboard handler */\r
-/* ---------------------- deinit_keyboard() -------------- April 17,1993 */\r
+ /* Acknowledge the interrupt to the programmable interrupt controller */
+ outp(0x20, 0x20); /* Signal non specific end of interrupt */
+}
+
+/* ---------------------- init_keyboard() ---------------- April 17,1993 */
+/* restore the bios keyboard handler */
+/* ---------------------- deinit_keyboard() -------------- April 17,1993 */
void setkb(int vq){
- int i; /* Index variable */\r
+ int i; /* Index variable */
if(!vq){ // deinitiation
- /* Abort if our function pointer has no valid address */\r
+ /* Abort if our function pointer has no valid address */
if(oldkb == NULL) return;
/* Set address in our function pointer in interrupt vector table */
_dos_setvect(9, oldkb);
- /* Reset our function pointer to contain no valid address */\r
+ /* Reset our function pointer to contain no valid address */
oldkb = NULL;
+ #ifdef TESTING
/* Print the key heap */
printf("\n");
for(i=0; i<NUM_SCANCODES; i++){
if(key[i]==1)printf("====");
printf(",\n");
}
+ #endif
}else if(vq == 1){ // initiation
byte far *lock_key;
- /* Abort if our function pointer has a valid address. */\r
- if(oldkb != NULL) return;\r
+ /* Abort if our function pointer has a valid address. */
+ if(oldkb != NULL) return;
- /* Clear the keyboard buttons state arrays */\r
- for(i = 0; i < NUM_SCANCODES; i++)\r
+ /* Clear the keyboard buttons state arrays */
+ for(i = 0; i < NUM_SCANCODES; i++)
key[i] = kea[i] = 0;
-\r
- /* save old BIOS key board handler */\r
- oldkb = _dos_getvect(9);\r
-\r
- // turn off num-lock via BIOS\r
- lock_key = MK_FP(0x040, 0x017); // Pointing to the address of the bios shift state keys\r
- *lock_key&=(~(16 | 32 | 64)); // toggle off the locks by changing the values of the 4th, 5th, and 6th bits of the address byte of 0040:0017\r
- oldkb(); // call BIOS keyhandler to change keyboard lights\r
-
- /* setup our own handler */\r
- _dos_setvect(9, newkb);\r
- }\r
-}\r
-\r
-/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *\\r
- * keyp *\r
- * *\r
- * Returns the status of the key requested. *\r
- * The status is 1 if the key is pressed or has been pressed since the *\r
- * last call to this function for that particular key. *\r
-\* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */\r
-int keyp(byte c){\r
- register char retVal;\r
-\r
- /* Key value in range of keyboard keys available */\r
- c &= 0x7F;\r
-
- /* Get the status of the key requested */\r
- retVal = key[c] | kea[c];\r
-\r
- /* Reset the was pressed status for the requested key */\r
+
+ /* save old BIOS key board handler */
+ oldkb = _dos_getvect(9);
+
+ // turn off num-lock via BIOS
+ lock_key = MK_FP(0x040, 0x017); // Pointing to the address of the bios shift state keys
+ *lock_key&=(~(16 | 32 | 64)); // toggle off the locks by changing the values of the 4th, 5th, and 6th bits of the address byte of 0040:0017
+ oldkb(); // call BIOS keyhandler to change keyboard lights
+
+ /* setup our own handler */
+ _dos_setvect(9, newkb);
+ }
+}
+
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *\
+ * keyp *
+ * *
+ * Returns the status of the key requested. *
+ * The status is 1 if the key is pressed or has been pressed since the *
+ * last call to this function for that particular key. *
+\* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+int keyp(byte c){
+ register char retVal;
+
+ /* Key value in range of keyboard keys available */
+ c &= 0x7F;
+
+ /* Get the status of the key requested */
+ retVal = key[c] | kea[c];
+
+ /* Reset the was pressed status for the requested key */
kea[c] = 0;
- /* Return the requested key's state */\r
- return retVal;\r
-}\r
+ /* Return the requested key's state */
+ return retVal;
+}
+
+
+/*
+ * The library testing routines follows below.
+ */
+
+#ifdef TESTING
+
+/*
+ * Library test (program) entry point.
+ */
+
+void main(void)
+{
+ byte q;
+ setkb(1);
+ while(!keyp(1))
+ {
+ keyp(q);
+ }
+ setkb(0);
+}
+
+#endif
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