Initial source

1 files changed, 110 insertions, 0 deletions

diff --git a/i386/i386at/nfdreg.h b/i386/i386at/nfdreg.h
new file mode 100644
index 0000000..9bdf44d
--- /dev/null
+++ b/i386/i386at/nfdreg.h
@@ -0,0 +1,110 @@
+/* 
+ * Copyright (c) 1994 Shantanu Goel
+ * All Rights Reserved.
+ * 
+ * Permission to use, copy, modify and distribute this software and its
+ * documentation is hereby granted, provided that both the copyright
+ * notice and this permission notice appear in all copies of the
+ * software, derivative works or modified versions, and any portions
+ * thereof, and that both notices appear in supporting documentation.
+ * 
+ * THE AUTHOR ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
+ * CONDITION.  THE AUTHOR DISCLAIMS ANY LIABILITY OF ANY KIND FOR
+ * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
+ */
+
+/*
+ * NEC 765/Intel 8272 floppy disk controller.
+ */
+
+/*
+ * Ports
+ */
+#define FD_DOR(p)	(p)		/* digital output register */
+#define FD_STATUS(p)	((p) + 2)	/* status register */
+#define FD_DATA(p)	((p) + 3)	/* data register */
+#define FD_RATE(p)	((p) + 5)	/* transfer rate register */
+#define FD_DIR(p)	((p) + 5)	/* digital input register */
+
+/*
+ * Digital output register.
+ */
+#define DOR_IENABLE	0x08	/* enable interrupts and DMA */
+#define DOR_RSTCLR	0x04	/* clear reset */
+
+/*
+ * Status register.
+ */
+#define ST_RQM		0x80	/* request for master */
+#define ST_DIO		0x40	/* direction of data transfer
+				   1 = fdc to cpu, 0 = cpu to fdc */
+#define ST_NDM		0x20	/* non DMA mode */
+#define ST_CB		0x10	/* controller busy */
+
+/*
+ * Digital input register.
+ */
+#define DIR_DSKCHG	0x80	/* diskette chnage has occured */
+
+/*
+ * ST0
+ */
+#define ST0_IC		0xc0	/* interrupt code */
+#define ST0_SE		0x20	/* seek end */
+#define ST0_EC		0x10	/* equipment check */
+#define ST0_NR		0x08	/* not ready */
+#define ST0_HD		0x04	/* head address */
+#define ST0_US		0x03	/* unit select */
+
+/*
+ * ST1
+ */
+#define ST1_EC		0x80	/* end of cylinder */
+#define ST1_DE		0x20	/* CRC data error */
+#define ST1_OR		0x10	/* DMA overrun */
+#define ST1_ND		0x04	/* sector not found */
+#define ST1_NW		0x02	/* write-protected diskette */
+#define ST1_MA		0x01	/* missing address mark */
+
+/*
+ * ST2
+ */
+#define ST2_CM		0x40	/* control mark */
+#define ST2_DD		0x20	/* data error */
+#define ST2_WC		0x10	/* wrong cylinder */
+#define ST2_SH		0x08	/* scan equal hit */
+#define ST2_SN		0x04	/* scan not satisfied */
+#define ST2_BC		0x02	/* bad cylinder */
+#define ST2_MD		0x01	/* missing address mark */
+
+/*
+ * ST3
+ */
+#define ST3_FT		0x80	/* fault */
+#define ST3_WP		0x40	/* write protect */
+#define ST3_RY		0x20	/* ready */
+#define ST3_T0		0x10	/* track 0 */
+#define ST3_TS		0x08	/* two side */
+#define ST3_HD		0x04	/* head address */
+#define ST3_US		0x03	/* unit select */
+
+/*
+ * Commands.
+ */
+#define CMD_SPECIFY	0x03
+#define CMD_RECAL	0x07
+#define CMD_SENSEI	0x08
+#define CMD_SEEK	0x0f
+#define CMD_FORMAT	0x4d
+#define CMD_WRITE	0xc5
+#define CMD_READ	0xe6
+
+/*
+ * Information required by FDC when formatting a diskette.
+ */
+struct format_info {
+	unsigned char	cyl;
+	unsigned char	head;
+	unsigned char	sector;
+	unsigned char	secsize;
+};