main.h

00001 #ifndef _MAIN_H_INCLUDED
00002 #define _MAIN_H_INCLUDED
00003 
00004 /*constants*/
00005 #define        MAX_NUMBER_OF_DOS_BUFFERS    5        /*the maximum numbers of available buffers within this device*/
00006 
00007 /*structures*/
00008 struct    DOS_buffer_struct
00009 {
00010     unsigned char    buffer_in_use;                /*this flag indicates wether the buffer is allready in use*/            
00011     unsigned char    buffer[256];                /*the buffer capable of holding a complete block*/
00012 };
00013 
00014 struct    DOS_channel_struct
00015 {
00016     unsigned char    channel_in_use;                /*this flag indicates wether this channel is allready in use*/
00017     unsigned char    next_action;                /*this holds the next action (if nothing interupts it) for this channel*/
00018     unsigned char    filename[17];                /*the actual filename, as it is stored on the disk*/
00019     unsigned char    filetype;                    /*filetype can be sequential, program, user, etc.*/
00020     unsigned char    RW;                            /*file read or write*/
00021     unsigned char    track;                        /*the current track position on the disk regarding this file*/
00022     unsigned char    sector;                        /*the current sector position on the disk regarding this file*/
00023     unsigned char    buffer_pointer;                /*the current byte position within the block specified by track and sector on the disk regarding this file*/
00024     unsigned char    used_buffer;                /*this register holds the value of the connected buffer (if required)*/
00025     unsigned char    status;                        /*the current status of this file entry in the sa_DOS_buffer*/
00026 };
00027 
00028 /*variables*/
00029 extern unsigned char    RAM_buffer[256];        /*this is the buffer capable of holding one 256 byte block, a memory area to which the user or the 1541-III can write/read data to/from*/
00030 //extern unsigned char    BAM_buffer[162];        /*this buffer holds the Block Allocation Map, required for when we want to write to the D64 (max 40 tracks)*/
00031 extern unsigned char     block_buffer[512];        /*this buffers the data 'as read from' or 'to be written to' the card*/
00032 extern struct            DOS_buffer_struct    DOS_buffer[MAX_NUMBER_OF_DOS_BUFFERS];    /*this array of structs holds the information about the currently used buffers*/
00033 extern struct            DOS_channel_struct    DOS_channel[16];    /*this array of structs holds this information about the currently used channels*/
00034 
00035 extern unsigned char Card_CID(void);
00036 extern unsigned char Card_CSD(void);
00037 
00038 /*routines*/
00039 /*--------*/
00040 // void delay_10uS(unsigned long delay);
00041 
00042 //void CLRWDT();
00043 
00044 #endif