scasm.cfg

; ECE2031, Simple Computer configuration file
; 2014

;;; Assembler Directives

#EXTENSION MIF   ;Extension to give assembled files

#ADDRBITS 11     ;Number of bits in the program address
#WORDBITS 16     ;Number of bits in the program word


;;; Program / Data file layout

;HEAD defines the heading to include at the top of the assembled file

#HEAD -- Altera Memory Initialization File (MIF)
#HEAD
#HEAD DEPTH = 2048;
#HEAD WIDTH = 16;
#HEAD
#HEAD ADDRESS_RADIX = HEX;
#HEAD DATA_RADIX = HEX;
#HEAD
#HEAD CONTENT
#HEAD   BEGIN
#HEAD     [000..7FF] : 0000;  -- Default to NOP
#HEAD

;LINE dictates how the assembled data should appear in the resulting file

;  %ADDR is the location of the address
;  %WORD is the location of the data / instruction word
;  %SOURCE is the location of the original line of code
#LINE            %ADDR : %WORD;  -- %SOURCE

;TAIL defines the trailer appended to the end of the assembled file

#TAIL   END;


;;; Mnemonics Definitions

;Mnemonic %field1, %field2, %field3, ...
;
;  %# Defines the number of bits, #, in a given field.
;     A number before the % indicates a constant field, such as an opcode.
;     The letter 's' immediately following the % indicates sign magnitude
;       representation instead of two's complement.
;
; Example:
;   LFSR  &H08%8, %6, %2
;
;   The LFSR mnemonic has one 8-bit constant field of value 0x08 and
;    2 user fields of bit lengths 6 and 2.

DW     %16          ;Allows manual word definition, useful for initializing RAM

NOP    &H00%16
LOAD   &H01%5, %11
STORE  &H02%5, %11
ADD    &H03%5, %11
SUB    &H04%5, %11
JUMP   &H05%5, %11
JNEG   &H06%5, %11
JPOS   &H07%5, %11
JZERO  &H08%5, %11
AND    &H09%5, %11
OR     &H0A%5, %11
XOR    &H0B%5, %11
SHIFT  &H0C%5, 0%6, %s5
ADDI   &H0D%5, %11
ILOAD  &H0E%5, %11
ISTORE &H0F%5, %11
CALL   &H10%5, %11
RETURN &H11%5, 0%11
IN     &H12%5, %11
OUT    &H13%5, %11
CLI    &H14%5, 0%7, %4
SEI    &H15%5, 0%7, %4
RETI   &H16%5, 0%11
LOADI  &H17%5, %11