/* params.h: virtual machine parameters */
/* Charles Eric LaForest, April 2008 */
/* laforest AT eecg.utoronto.ca */

#define STACK_DEPTH 32
#define STACK_DEPTH_MASK 0x1f		/*Must match STACK_DEPTH*/

#define OPCODE_WIDTH 5
#define OPCODE_MASK 0x1f		/*Must match OPCODE_WIDTH*/

#define CYCLE_COUNTER (mem_size - 5)

/*in bytes, simulator uses ints, so 128 ints per block*/
#define DISK_BLOCK_SIZE 512
#define DISK_READ_PORT (mem_size - 4)
#define DISK_WRITE_PORT (mem_size - 3)

#define MEM_INPUT (mem_size - 2)
#define MEM_OUTPUT (mem_size - 1)


enum {
PCFETCH = 0,		/*PC@ *must* be opcode 0*/
CALL,
RET,
JMP,
JMPZERO,
JMPPLUS,
FETCHA,
STOREA,
FETCHAPLUS,
STOREAPLUS,
FETCHRPLUS,
STORERPLUS,
LIT,
RTU,               /* Return To User*/
UNDEF1,
UNDEF2,
XOR,
AND,
NOT,
TWOSTAR,
TWOSLASH,
PLUS,
PLUSSTAR,
DUP,
DROP,
OVER,
TOR,
RFROM,
TOA,
AFROM,
NOP,
UNDEF3
};