fossinfo.c

/* Builds with Borland C++ for DOS, v3.1 */

#include <dos.h>
#include <stdio.h>
#include <memory.h>
#include <string.h>     /* _fstrncpy */
#include "fossdefs.h"

void main(int argc, char** argv)
{
	BYTE far*     bp;
	fossil_info_t info;
	WORD          ax, bx;
	char          id_string[128];
	union REGS    regs;
	struct SREGS  sregs;

	printf("\nChecking FOSSIL interrupt vector (interrupt 0x%02X)\n", FOSSIL_INTERRUPT);
	bp = (void far*)_dos_getvect(FOSSIL_INTERRUPT);

	printf("FOSSIL interrupt vector: 0x%08lX\n", bp);
	printf("Signature: 0x%04X (should be 0x%04X)\n", *(WORD far*)(bp + 6), FOSSIL_SIGNATURE);
	printf("Highest function supported: 0x%02X\n", *(BYTE far*)(bp + 8));


	printf("\nInitializing FOSSIL\n");
	regs.h.ah = FOSSIL_FUNC_INIT;
	int86(FOSSIL_INTERRUPT, &regs, &regs);
	printf("AX=0x%04X (should be 0x%04X)\n", regs.x.ax, FOSSIL_SIGNATURE);
	printf("BX=0x%04X (FOSSIL rev %u, highest function supported: 0x%02X)\n"
	       , regs.x.bx, regs.h.bh, regs.h.bl);

	printf("\nGetting FOSSIL Information\n");
	printf("sizeof(info)=%u\n", sizeof(info));
	memset(&info, 0, sizeof(info));

/**
 AH = 1Bh    Return information about the driver

           Parameters:
               Entry:  CX = Size of user info buffer in bytes
                       DX = Port number
                       ES = Segment of user info buffer
                       DI = Offset into ES of user info buffer
               Exit:   AX = Number of bytes actually transferred

**/

	bp = (BYTE far*)&info;
	regs.h.ah = FOSSIL_FUNC_GET_INFO;
	regs.x.cx = sizeof(info);
	regs.x.dx = 0;
	sregs.es = FP_SEG(bp);
	regs.x.di = FP_OFF(bp);

	int86x(FOSSIL_INTERRUPT, &regs, &regs, &sregs);
	printf("AX=0x%04X (%u)\n", regs.x.ax, regs.x.ax);
	printf("Information structure size: %u\n", info.info_size);
	printf("FOSSIL specific revision: %u\n", info.curr_fossil);
	printf("FOSSIL driver revision: %u\n", info.curr_rev);
	printf("ID string: 0x%08lX\n", info.id_string);
	if (info.id_string) {
		_fstrncpy(id_string, (char far *)info.id_string, sizeof(id_string));
		printf("ID string: %s\n", id_string);
	}
	printf("Receive buffer size: %u\n", info.inbuf_size);
	printf("Receive buffer space: %u\n", info.inbuf_free);
	printf("Transmit buffer size: %u\n", info.outbuf_size);
	printf("Transmit buffer space: %u\n", info.outbuf_free);
	printf("Screen width: %u\n", info.screen_width);
	printf("Screen height: %u\n", info.screen_height);
	printf("Baud rate: 0x%02X (%u %c-%u-%u)\n"
	       , info.baud_rate
	       , fossil_baud_rate[(info.baud_rate & FOSSIL_BAUD_RATE_MASK) >> FOSSIL_BAUD_RATE_SHIFT]
	       , fossil_parity[(info.baud_rate & FOSSIL_PARITY_MASK) >> FOSSIL_PARITY_SHIFT]
	       , fossil_data_bits[(info.baud_rate & FOSSIL_DATA_BITS_MASK) >> FOSSIL_DATA_BITS_SHIFT]
	       , fossil_stop_bits[(info.baud_rate & FOSSIL_STOP_BITS_MASK) >> FOSSIL_STOP_BITS_SHIFT]
	       );

	regs.h.ah = FOSSIL_FUNC_GET_STATUS;
	int86x(FOSSIL_INTERRUPT, &regs, &regs, &sregs);
	printf("STATUS=0x%04X (%u)\n", regs.x.ax, regs.x.ax);

	if (argc > 1 && stricmp(argv[1], "pause") == 0) {
		printf("\nHit enter to continue...");
		getchar();
	}
}