/* Hardware constants */
#define LASTPAGE     125                /* Pages of memory
0,1,...LASTPAGE */
#define PAGESIZE     512                /* Page size in bytes */
#define MEMORYSIZE   ((LASTPAGE+1)*PAGESIZE - 1)   /* Memory size in
bytes */
#define TEXTORIGIN   PAGESIZE*2         /* Starting address of the
code */

/* Top most device number in a class */
#define UPDISK      0           /* disk device numbers 0...UPDISK */
#define UPDRUM      0           /* drum device numbers 0...UPDRUM */
#define UPPRINTER   0           /* printer device numbers
0...UPPRINTER */
#define UPTERM      4           /* terminal device numbers 0...UPTERM
*/

/* Device capacities */
#define UPAMOUNT    128         /* max no of bytes for printer and
terminals */#define UPSECTOR    7           /* disk sector numbers
0...UPSECTOR */
#define UPTRACK     3           /* disk track numbers 0...UPTRACK */
#define UPDRUMSEC   199         /* drum sector numbers 0...UPDRUMSEC
*/

/* I/O time for each device class (in clock ticks) */
#define TERMTIME        10000
#define PRINTERTIME     10000
#define DISKTIME        100
#define SEEKCONST       100
#define DRUMTIME        100
#define SEEKTIME(x)     (SEEKCONST * (unsigned)sqrt(x))

#define UPDEVICES    16+1        /* Max number of devices plus clock
*/
#define MAXPRIO      8           /* Maximum priority number */