REFERENCE:
 Application Report: "Implementation of FIR/IIR Filters with the
 TMS32010/TMS32020," Lovrich and Simar,
 Digital Signal Processing Applications with the TMS320 Family, Texas
 Instruments Inc.


 There are six filter programs contained in this directory:

 1. FIRBPASS.ASM
 2. FIDDIF.ASM
 3. IIR4CAS.ASM
 4. IIR4DIR.ASM
 5. IIR4PAR.ASM
 6. SFIR.ASM

 Program #6, SFIR.ASM, is written exclusively for the TMS32020 Digital
 signal Processor. The rest of the programs use the TMS32010 instruction
 set. Since the TMS32020 instruction set is a superset of the TMS32010
 instruction set, the user may re-assemble the code using the TMS32020
 assembler, with minor changes to the initialization section of the
 programs, using the following example as a model.

 o Section of TMS32010 code (from FIRBPASS.ASM program)

            .
            .
            .
          LARK  AR0,CLOCK
          LARK  AR1,>29
          LACK  SMP
   LOAD   LARP  AR0
          TBLR  *-,AR1
          SUB   ONE
          BANZ  LOAD
            .
            .
            .

 o TMS32020 modifications

            .
            .
            .
          LACK  MD
          TBLR  MODE
          OUT   MODE,PA0
          LACK  SMP
          TBLR  CLOCK
          OUT   CLOCK,PA1
          LARK  AR0,H39
          RPTK  >27
          BLKP  CTABLE,*-
            .
            .
            .
