1 files changed, 71 insertions, 0 deletions

diff --git a/src/include/linux/fdreg.h b/src/include/linux/fdreg.h
new file mode 100644
index 0000000..01355af
--- /dev/null
+++ b/src/include/linux/fdreg.h
@@ -0,0 +1,71 @@
+/*
+ * This file contains some defines for the floppy disk controller.
+ * Various sources. Mostly "IBM Microcomputers: A Programmers
+ * Handbook", Sanches and Canton.
+ */
+#ifndef _FDREG_H
+#define _FDREG_H
+
+extern int ticks_to_floppy_on(unsigned int nr);
+extern void floppy_on(unsigned int nr);
+extern void floppy_off(unsigned int nr);
+extern void floppy_select(unsigned int nr);
+extern void floppy_deselect(unsigned int nr);
+
+/* Fd controller regs. S&C, about page 340 */
+#define FD_STATUS       0x3f4
+#define FD_DATA         0x3f5
+#define FD_DOR          0x3f2           /* Digital Output Register */
+#define FD_DIR          0x3f7           /* Digital Input Register (read) */
+#define FD_DCR          0x3f7           /* Diskette Control Register (write)*/
+
+/* Bits of main status register */
+#define STATUS_BUSYMASK 0x0F            /* drive busy mask */
+#define STATUS_BUSY     0x10            /* FDC busy */
+#define STATUS_DMA      0x20            /* 0- DMA mode */
+#define STATUS_DIR      0x40            /* 0- cpu->fdc */
+#define STATUS_READY    0x80            /* Data reg ready */
+
+/* Bits of FD_ST0 */
+#define ST0_DS          0x03            /* drive select mask */
+#define ST0_HA          0x04            /* Head (Address) */
+#define ST0_NR          0x08            /* Not Ready */
+#define ST0_ECE         0x10            /* Equipment chech error */
+#define ST0_SE          0x20            /* Seek end */
+#define ST0_INTR        0xC0            /* Interrupt code mask */
+
+/* Bits of FD_ST1 */
+#define ST1_MAM         0x01            /* Missing Address Mark */
+#define ST1_WP          0x02            /* Write Protect */
+#define ST1_ND          0x04            /* No Data - unreadable */
+#define ST1_OR          0x10            /* OverRun */
+#define ST1_CRC         0x20            /* CRC error in data or addr */
+#define ST1_EOC         0x80            /* End Of Cylinder */
+
+/* Bits of FD_ST2 */
+#define ST2_MAM         0x01            /* Missing Addess Mark (again) */
+#define ST2_BC          0x02            /* Bad Cylinder */
+#define ST2_SNS         0x04            /* Scan Not Satisfied */
+#define ST2_SEH         0x08            /* Scan Equal Hit */
+#define ST2_WC          0x10            /* Wrong Cylinder */
+#define ST2_CRC         0x20            /* CRC error in data field */
+#define ST2_CM          0x40            /* Control Mark = deleted */
+
+/* Bits of FD_ST3 */
+#define ST3_HA          0x04            /* Head (Address) */
+#define ST3_TZ          0x10            /* Track Zero signal (1=track 0) */
+#define ST3_WP          0x40            /* Write Protect */
+
+/* Values for FD_COMMAND */
+#define FD_RECALIBRATE  0x07            /* move to track 0 */
+#define FD_SEEK         0x0F            /* seek track */
+#define FD_READ         0xE6            /* read with MT, MFM, SKip deleted */
+#define FD_WRITE        0xC5            /* write with MT, MFM */
+#define FD_SENSEI       0x08            /* Sense Interrupt Status */
+#define FD_SPECIFY      0x03            /* specify HUT etc */
+
+/* DMA commands */
+#define DMA_READ        0x46
+#define DMA_WRITE       0x4A
+
+#endif