backported more fixes from 256boss

[bootcensus] / src / floppy.h

diff --git a/src/floppy.h b/src/floppy.h
new file mode 100644 (file)
index 0000000..f38e284
--- /dev/null
+++ b/src/floppy.h
@@ -0,0 +1,44 @@
+/*
+pcboot - bootable PC demo/game kernel
+Copyright (C) 2018-2019  John Tsiombikas <nuclear@member.fsf.org>
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY, without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <https://www.gnu.org/licenses/>.
+*/
+#ifndef FLOPPY_H_
+#define FLOPPY_H_
+
+#define FDC_REG_DOUT   0x3f2
+#define FDC_REG_STAT   0x3f4
+#define FDC_REG_DATA   0x3f5
+
+#define FDC_STAT_ACTA  0x01
+#define FDC_STAT_ACTB  0x02
+#define FDC_STAT_ACTC  0x04
+#define FDC_STAT_ACTD  0x08
+#define FDC_STAT_BUSY  0x10
+#define FDC_STAT_NODMA 0x20
+#define FDC_STAT_IODIR 0x40
+#define FDC_STAT_RDY   0x80
+
+#define FDC_DOUT_SEL(x)        (x)
+#define FDC_DOUT_RST   0x04
+#define FDC_DOUT_DMA   0x08
+#define FDC_DOUT_MOTA  0x10
+#define FDC_DOUT_MOTB  0x20
+#define FDC_DOUT_MOTC  0x40
+#define FDC_DOUT_MOTD  0x80
+
+void floppy_motors_off(void);
+
+#endif /* FLOPPY_H_ */