AltairZ80/wd179x.h

   1 /*************************************************************************
   2  *                                                                       *
   3  * $Id: wd179x.h 1907 2008-05-21 07:04:17Z hharte $                      *
   4  *                                                                       *
   5  * Copyright (c) 2007-2008 Howard M. Harte.                              *
   6  * http://www.hartetec.com                                               *
   7  *                                                                       *
   8  * Permission is hereby granted, free of charge, to any person obtaining *
   9  * a copy of this software and associated documentation files (the       *
  10  * "Software"), to deal in the Software without restriction, including   *
  11  * without limitation the rights to use, copy, modify, merge, publish,   *
  12  * distribute, sublicense, and/or sell copies of the Software, and to    *
  13  * permit persons to whom the Software is furnished to do so, subject to *
  14  * the following conditions:                                             *
  15  *                                                                       *
  16  * The above copyright notice and this permission notice shall be        *
  17  * included in all copies or substantial portions of the Software.       *
  18  *                                                                       *
  19  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       *
  20  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    *
  21  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND                 *
  22  * NONINFRINGEMENT. IN NO EVENT SHALL HOWARD M. HARTE BE LIABLE FOR ANY  *
  23  * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  *
  24  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     *
  25  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                *
  26  *                                                                       *
  27  * Except as contained in this notice, the name of Howard M. Harte shall *
  28  * not be used in advertising or otherwise to promote the sale, use or   *
  29  * other dealings in this Software without prior written authorization   *
  30  * Howard M. Harte.                                                      *
  31  *                                                                       *
  32  * SIMH Interface based on altairz80_hdsk.c, by Peter Schorn.            *
  33  *                                                                       *
  34  * Module Description:                                                   *
  35  *     Generic Intel 8272 Disk Controller module for SIMH.               *
  36  *                                                                       *
  37  * Environment:                                                          *
  38  *     User mode only                                                    *
  39  *                                                                       *
  40  *************************************************************************/
  41
  42 extern t_stat wd179x_attach(UNIT *uptr, char *cptr);
  43 extern t_stat wd179x_detach(UNIT *uptr);
  44 extern uint8 WD179X_Set_DMA(const uint32 dma_addr);
  45 extern uint8 WD179X_Read(const uint32 Addr);
  46 extern uint8 WD179X_Write(const uint32 Addr, uint8 cData);
  47
  48 extern void wd179x_external_restore(void);
  49
  50 #define WD179X_FDC_MSR       0   /* R=FDC Main Status Register, W=Drive Select Register */
  51 #define WD179X_FDC_DATA      1   /* R/W FDC Data Register */
  52
  53 #define WD179X_STATUS 0
  54 #define WD179X_TRACK  1
  55 #define WD179X_SECTOR 2
  56 #define WD179X_DATA   3
  57
  58 typedef struct {
  59     PNP_INFO pnp;       /* Plug-n-Play Information */
  60     uint8 intrq;        /* WD179X Interrupt Request Output (EOJ) */
  61     uint8 hld;          /* WD179X Head Load Output */
  62     uint8 drq;          /* WD179X DMA Request Output */
  63     uint8 ddens;        /* WD179X Double-Density Input */
  64     uint8 fdc_head;     /* H Head Number */
  65     uint8 sel_drive;    /* Currently selected drive */
  66     uint8 drivetype;    /* 8 or 5 depending on disk type. */
  67 } WD179X_INFO_PUB;