Subversion Repositories ffr16

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INSTRUCTION-

   OPERAND1-

   OPERAND2-

    COMMENT-; FAT16 READER V.050303 - Armando Astarloa - 16 BIT VER.

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INSTRUCTION-

   OPERAND1-

   OPERAND2-

    COMMENT-; APERT - UPV/EHU 2003 - DISTRIBUTED UNDER GPL LICENCE

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INSTRUCTION-

   OPERAND1-

   OPERAND2-

    COMMENT-;

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      LABEL-

INSTRUCTION-

   OPERAND1-

   OPERAND2-

    COMMENT-; s0 -> TMP0 s1 -> TMP1 s2 -> TMP2 s3 -> TMP3 s4 -> TMP4 / SECTORS_PER_CLUSTER_READED s5 -> TMP5/SECTOR_WORDS_READED (256 TO 0)

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      LABEL-

INSTRUCTION-

   OPERAND1-

   OPERAND2-

    COMMENT-; s6 -> TMP s7 -> SECTORS_PER_CLUSTER s8 -> CLUSTER_BEGIN_LBA0 (FAT) s9 -> CLUSTER_BEGIN_LBA1 sA -> CLUSTER_BEGIN_LBA2

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      LABEL-

INSTRUCTION-

   OPERAND1-

   OPERAND2-

    COMMENT-; sB -> CLUSTER_BEGIN_LBA3 sC -> ROOT_DIRECTORY_FIRST_CLUSTER0 (SUPPOSED LESS THAN 256 - USUALLY 2)

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INSTRUCTION-

   OPERAND1-

   OPERAND2-

    COMMENT-; sD -> data[7:0] WB MASTER sE -> data[15:8] WB MASTER sF -> acummulator

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      LABEL-

INSTRUCTION-CONSTANT

   OPERAND1-DATA_WB_OUT_7_0_MASTER

   OPERAND2-00

    COMMENT-

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      LABEL-

INSTRUCTION-CONSTANT

   OPERAND1-DATA_WB_OUT_15_8_MASTER

   OPERAND2-01

    COMMENT-

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      LABEL-

INSTRUCTION-CONSTANT

   OPERAND1-CONTROL_WB_OUT_MASTER

   OPERAND2-02

    COMMENT-

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INSTRUCTION-

   OPERAND1-

   OPERAND2-

    COMMENT-; D7 = D6 = D5 = D4 = D3 = D2 = A0_MASTER D1 = W_WE_MASTER D0 = STB_O_MASTER

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INSTRUCTION-

   OPERAND1-

   OPERAND2-

    COMMENT-; STROBE_O_MASTER = 1 & W_WE=0 & WB_A0 = 0

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INSTRUCTION-CONSTANT

   OPERAND1-READ_SLAVE

   OPERAND2-01

    COMMENT-

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      LABEL-

INSTRUCTION-

   OPERAND1-

   OPERAND2-

    COMMENT-; STROBE_O_MASTER = 1 & W_WE=1 & WB_A0 = 0

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INSTRUCTION-CONSTANT

   OPERAND1-WRITE_LBA_15_0

   OPERAND2-03

    COMMENT-

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INSTRUCTION-

   OPERAND1-

   OPERAND2-

    COMMENT-; STROBE_CF_READER = 1 & W_WE=1 & WB_A0 = 1

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INSTRUCTION-CONSTANT

   OPERAND1-WRITE_LBA_27_16

   OPERAND2-07

    COMMENT-

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INSTRUCTION-

   OPERAND1-

   OPERAND2-

    COMMENT-;--

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      LABEL-

INSTRUCTION-

   OPERAND1-

   OPERAND2-

    COMMENT-;-- SLAVE INTERFACE

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INSTRUCTION-

   OPERAND1-

   OPERAND2-

    COMMENT-;--

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      LABEL-

INSTRUCTION-CONSTANT

   OPERAND1-DATA_WB_OUT_7_0_SLAVE

   OPERAND2-03

    COMMENT-

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      LABEL-

INSTRUCTION-CONSTANT

   OPERAND1-DATA_WB_OUT_15_8_SLAVE

   OPERAND2-04

    COMMENT-

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      LABEL-

INSTRUCTION-CONSTANT

   OPERAND1-CONTROL_WB_OUT_SLAVE

   OPERAND2-05

    COMMENT-

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INSTRUCTION-

   OPERAND1-

   OPERAND2-

    COMMENT-; D7 =  D6 =  D5  D4 =  D3 =

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INSTRUCTION-

   OPERAND1-

   OPERAND2-

    COMMENT-; D2 = TAG1_ERROR

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INSTRUCTION-

   OPERAND1-

   OPERAND2-

    COMMENT-; D1 = TAG0_WORD_AVAILABLE

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INSTRUCTION-

   OPERAND1-

   OPERAND2-

    COMMENT-; D0 = ACK_O_SLAVE

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INSTRUCTION-CONSTANT

   OPERAND1-ACK_O_SLAVE

   OPERAND2-01

    COMMENT-

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      LABEL-

INSTRUCTION-CONSTANT

   OPERAND1-TAG0_WORD_AVAILABLE

   OPERAND2-02

    COMMENT-

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      LABEL-

INSTRUCTION-CONSTANT

   OPERAND1-ERROR

   OPERAND2-04

    COMMENT-

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INSTRUCTION-

   OPERAND1-

   OPERAND2-

    COMMENT-;--

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INSTRUCTION-

   OPERAND1-

   OPERAND2-

    COMMENT-;-- BUS CONTROL SIGNALS

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INSTRUCTION-

   OPERAND1-

   OPERAND2-

    COMMENT-;--

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      LABEL-

INSTRUCTION-CONSTANT

   OPERAND1-CONTROL_OUT_MASTER

   OPERAND2-06

    COMMENT-

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INSTRUCTION-

   OPERAND1-

   OPERAND2-

    COMMENT-; D7 =  D6 = D5 = D4 = D3 = D2 = D1 =

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INSTRUCTION-

   OPERAND1-

   OPERAND2-

    COMMENT-; D0 = WB_BUS_MASTER_WRITE_ENABLE

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INSTRUCTION-CONSTANT

   OPERAND1-WB_BUS_MASTER_WRITE_ENABLE

   OPERAND2-01

    COMMENT-

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INSTRUCTION-CONSTANT

   OPERAND1-CONTROL_OUT_SLAVE

   OPERAND2-07

    COMMENT-

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INSTRUCTION-

   OPERAND1-

   OPERAND2-

    COMMENT-; D7 =  D6 = D5 = D4 = D3 = D2 = D1 =

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INSTRUCTION-

   OPERAND1-

   OPERAND2-

    COMMENT-; D0 = WB_BUS_SLAVE_WRITE_ENABLE

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INSTRUCTION-CONSTANT

   OPERAND1-WB_BUS_SLAVE_WRITE_ENABLE

   OPERAND2-01

    COMMENT-

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      LABEL-

INSTRUCTION-

   OPERAND1-

   OPERAND2-

    COMMENT-;--

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      LABEL-

INSTRUCTION-

   OPERAND1-

   OPERAND2-

    COMMENT-;-- EXTERNAL REGISTERS FOR MORE DATA ALLOCATION (OTHER OPTION IS THE USE OF

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INSTRUCTION-

   OPERAND1-

   OPERAND2-

    COMMENT-;-- ANOTHER BLOCK RAM IF IT IS AVALIABLE

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INSTRUCTION-

   OPERAND1-

   OPERAND2-

    COMMENT-;--

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      LABEL-

INSTRUCTION-CONSTANT

   OPERAND1-TMP_OUT_0

   OPERAND2-08

    COMMENT-

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INSTRUCTION-CONSTANT

   OPERAND1-TMP_OUT_1

   OPERAND2-09

    COMMENT-

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INSTRUCTION-CONSTANT

   OPERAND1-TMP_OUT_2

   OPERAND2-0A

    COMMENT-

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INSTRUCTION-CONSTANT

   OPERAND1-TMP_OUT_3

   OPERAND2-0B

    COMMENT-

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INSTRUCTION-CONSTANT

   OPERAND1-TMP_OUT_4

   OPERAND2-0C

    COMMENT-

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INSTRUCTION-CONSTANT

   OPERAND1-TMP_OUT_5

   OPERAND2-0D

    COMMENT-

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INSTRUCTION-CONSTANT

   OPERAND1-TMP_OUT_6

   OPERAND2-0E

    COMMENT-

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INSTRUCTION-CONSTANT

   OPERAND1-TMP_OUT_7

   OPERAND2-0F

    COMMENT-

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INSTRUCTION-

   OPERAND1-

   OPERAND2-

    COMMENT-;--

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      LABEL-

INSTRUCTION-

   OPERAND1-

   OPERAND2-

    COMMENT-;-- INPUT PORTS

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INSTRUCTION-

   OPERAND1-

   OPERAND2-

    COMMENT-;--

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      LABEL-

INSTRUCTION-

   OPERAND1-

   OPERAND2-

    COMMENT-;--

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      LABEL-

INSTRUCTION-

   OPERAND1-

   OPERAND2-

    COMMENT-;-- WISHBONE INTERFACE PORTS - INPUTS

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INSTRUCTION-

   OPERAND1-

   OPERAND2-

    COMMENT-;--

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      LABEL-

INSTRUCTION-CONSTANT

   OPERAND1-CONTROL_WB_IN_MASTER

   OPERAND2-00

    COMMENT-

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      LABEL-

INSTRUCTION-

   OPERAND1-

   OPERAND2-

    COMMENT-; D7 = D6 = D5 = D4 = D3 = D2 =

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      LABEL-

INSTRUCTION-

   OPERAND1-

   OPERAND2-

    COMMENT-; D1 = ERROR_INPUT

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      LABEL-

INSTRUCTION-

   OPERAND1-

   OPERAND2-

    COMMENT-; D0 = ACK_I_MASTER

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      LABEL-

INSTRUCTION-

   OPERAND1-

   OPERAND2-

    COMMENT-;

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      LABEL-

INSTRUCTION-CONSTANT

   OPERAND1-ACK_I_MASTER

   OPERAND2-01

    COMMENT-

    ADDRESS-00

      LABEL-

INSTRUCTION-CONSTANT

   OPERAND1-ERROR_INPUT

   OPERAND2-02

    COMMENT-

    ADDRESS-00

      LABEL-

INSTRUCTION-CONSTANT

   OPERAND1-CONTROL_WB_IN_SLAVE

   OPERAND2-01

    COMMENT-

    ADDRESS-00

      LABEL-

INSTRUCTION-

   OPERAND1-

   OPERAND2-

    COMMENT-; D7 = D6 = D5 = D4 = D3 = D2 =

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      LABEL-

INSTRUCTION-

   OPERAND1-

   OPERAND2-

    COMMENT-; D1 = -

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INSTRUCTION-

   OPERAND1-

   OPERAND2-

    COMMENT-; D0 = STB_I_SLAVE

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INSTRUCTION-

   OPERAND1-

   OPERAND2-

    COMMENT-;

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      LABEL-

INSTRUCTION-CONSTANT

   OPERAND1-STB_I_SLAVE

   OPERAND2-01

    COMMENT-

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INSTRUCTION-

   OPERAND1-

   OPERAND2-

    COMMENT-;CONSTANT TAG0_FORCE_RESET,02

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INSTRUCTION-

   OPERAND1-

   OPERAND2-

    COMMENT-;--

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INSTRUCTION-

   OPERAND1-

   OPERAND2-

    COMMENT-;-- WISHBONE INTERFACE PORTS - INPUTS

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INSTRUCTION-

   OPERAND1-

   OPERAND2-

    COMMENT-;--

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      LABEL-

INSTRUCTION-CONSTANT

   OPERAND1-DATA_WB_IN_7_0_MASTER

   OPERAND2-02

    COMMENT-

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      LABEL-

INSTRUCTION-CONSTANT

   OPERAND1-DATA_WB_IN_15_8_MASTER

   OPERAND2-03

    COMMENT-

    ADDRESS-00

      LABEL-

INSTRUCTION-

   OPERAND1-

   OPERAND2-

    COMMENT-;--

    ADDRESS-00

      LABEL-

INSTRUCTION-

   OPERAND1-

   OPERAND2-

    COMMENT-;-- EXTERNAL REGISTERS FOR MORE DATA ALLOCATION (OTHER OPTION IS THE USE OF

    ADDRESS-00

      LABEL-

INSTRUCTION-

   OPERAND1-

   OPERAND2-

    COMMENT-;-- ANOTHER BLOCK RAM IF IT IS AVALIABLE

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INSTRUCTION-

   OPERAND1-

   OPERAND2-

    COMMENT-;--

    ADDRESS-00

      LABEL-

INSTRUCTION-CONSTANT

   OPERAND1-TMP_IN_0

   OPERAND2-04

    COMMENT-

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      LABEL-

INSTRUCTION-CONSTANT

   OPERAND1-TMP_IN_1

   OPERAND2-05

    COMMENT-

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INSTRUCTION-CONSTANT

   OPERAND1-TMP_IN_2

   OPERAND2-06

    COMMENT-

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INSTRUCTION-CONSTANT

   OPERAND1-TMP_IN_3

   OPERAND2-07

    COMMENT-

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INSTRUCTION-CONSTANT

   OPERAND1-TMP_IN_4

   OPERAND2-08

    COMMENT-

    ADDRESS-00

      LABEL-

INSTRUCTION-CONSTANT

   OPERAND1-TMP_IN_5

   OPERAND2-09

    COMMENT-

    ADDRESS-00

      LABEL-

INSTRUCTION-CONSTANT

   OPERAND1-TMP_IN_6

   OPERAND2-0A

    COMMENT-

    ADDRESS-00

      LABEL-

INSTRUCTION-CONSTANT

   OPERAND1-TMP_IN_7

   OPERAND2-0B

    COMMENT-

    ADDRESS-00

      LABEL-

INSTRUCTION-

   OPERAND1-

   OPERAND2-

    COMMENT-;--

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      LABEL-

INSTRUCTION-

   OPERAND1-

   OPERAND2-

    COMMENT-;-- REGISTERS INITIALIZATION

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      LABEL-

INSTRUCTION-

   OPERAND1-

   OPERAND2-

    COMMENT-;--

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      LABEL-inicialization

INSTRUCTION-

   OPERAND1-

   OPERAND2-

    COMMENT-

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      LABEL-

INSTRUCTION-

   OPERAND1-

   OPERAND2-

    COMMENT-;

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      LABEL-

INSTRUCTION-

   OPERAND1-

   OPERAND2-

    COMMENT-; WISHBONE INTERFACES INIZIALIZATION

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      LABEL-

INSTRUCTION-

   OPERAND1-

   OPERAND2-

    COMMENT-;

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      LABEL-

INSTRUCTION-LOAD

   OPERAND1-sF

   OPERAND2-00

    COMMENT-

    ADDRESS-01

      LABEL-

INSTRUCTION-OUTPUT

   OPERAND1-sF

   OPERAND2-DATA_WB_OUT_7_0_MASTER

    COMMENT-

    ADDRESS-02

      LABEL-

INSTRUCTION-OUTPUT

   OPERAND1-sF

   OPERAND2-DATA_WB_OUT_15_8_MASTER

    COMMENT-

    ADDRESS-03

      LABEL-

INSTRUCTION-OUTPUT

   OPERAND1-sF

   OPERAND2-DATA_WB_OUT_7_0_SLAVE

    COMMENT-

    ADDRESS-04

      LABEL-

INSTRUCTION-OUTPUT

   OPERAND1-sF

   OPERAND2-DATA_WB_OUT_15_8_SLAVE

    COMMENT-

    ADDRESS-05

      LABEL-

INSTRUCTION-OUTPUT

   OPERAND1-sF

   OPERAND2-CONTROL_WB_OUT_MASTER

    COMMENT-

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      LABEL-

INSTRUCTION-OUTPUT

   OPERAND1-sF

   OPERAND2-CONTROL_WB_OUT_SLAVE

    COMMENT-

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      LABEL-

INSTRUCTION-

   OPERAND1-

   OPERAND2-

    COMMENT-;

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      LABEL-

INSTRUCTION-

   OPERAND1-

   OPERAND2-

    COMMENT-; WAIT FOR 410NS*3 (RESET DELAY)

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      LABEL-

INSTRUCTION-

   OPERAND1-

   OPERAND2-

    COMMENT-

    ADDRESS-07

      LABEL-main

INSTRUCTION-

   OPERAND1-

   OPERAND2-

    COMMENT-

    ADDRESS-07

      LABEL-

INSTRUCTION-

   OPERAND1-

   OPERAND2-

    COMMENT-; PROCESS MASTER BOOT RECORD

    ADDRESS-07

      LABEL-

INSTRUCTION-CALL

   OPERAND1-process_master_boot_record

   OPERAND2-

    COMMENT-

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      LABEL-

INSTRUCTION-

   OPERAND1-

   OPERAND2-

    COMMENT-; PROCESS ROOT DIRECTORY

    ADDRESS-08

      LABEL-

INSTRUCTION-CALL

   OPERAND1-process_root_directory

   OPERAND2-

    COMMENT-

    ADDRESS-09

      LABEL-start

INSTRUCTION-

   OPERAND1-

   OPERAND2-

    COMMENT-

    ADDRESS-09

      LABEL-

INSTRUCTION-CALL

   OPERAND1-cluster_2_lba

   OPERAND2-

    COMMENT-

    ADDRESS-0A

      LABEL-

INSTRUCTION-

   OPERAND1-

   OPERAND2-

    COMMENT-;CALL write_lba_to_slave

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      LABEL-

INSTRUCTION-

   OPERAND1-

   OPERAND2-

    COMMENT-; sector_per_cluster -> sector_per_cluster_readed

    ADDRESS-0A

      LABEL-

INSTRUCTION-LOAD

   OPERAND1-s4

   OPERAND2-s7

    COMMENT-

    ADDRESS-0B

      LABEL-

INSTRUCTION-

   OPERAND1-

   OPERAND2-

    COMMENT-; 256 -> (s6) SECTOR_WORDS_READED

    ADDRESS-0B

      LABEL-

INSTRUCTION-CALL

   OPERAND1-read_sector

   OPERAND2-

    COMMENT-

    ADDRESS-0C

      LABEL-idle

INSTRUCTION-

   OPERAND1-

   OPERAND2-

    COMMENT-

    ADDRESS-0C

      LABEL-

INSTRUCTION-INPUT

   OPERAND1-s6

   OPERAND2-CONTROL_WB_IN_SLAVE

    COMMENT-

    ADDRESS-0D

      LABEL-

INSTRUCTION-

   OPERAND1-

   OPERAND2-

    COMMENT-; CHECK STB INPUT

    ADDRESS-0D

      LABEL-

INSTRUCTION-

   OPERAND1-

   OPERAND2-

    COMMENT-; CONTROL_WB_IN_SLAVE-> TMP (s6)

    ADDRESS-0D

      LABEL-

INSTRUCTION-

   OPERAND1-

   OPERAND2-

    COMMENT-; IF STB=1 GO TO THE NEXT STATE

    ADDRESS-0D

      LABEL-

INSTRUCTION-

   OPERAND1-

   OPERAND2-

    COMMENT-; IF STB=0 GO TO THE IDLE STATE

    ADDRESS-0D

      LABEL-

INSTRUCTION-AND

   OPERAND1-s6

   OPERAND2-STB_I_SLAVE

    COMMENT-

    ADDRESS-0E

      LABEL-

INSTRUCTION-JUMP

   OPERAND1-Z

   OPERAND2-idle

    COMMENT-

    ADDRESS-0F

      LABEL-transfer_word_to_master

INSTRUCTION-

   OPERAND1-

   OPERAND2-

    COMMENT-

    ADDRESS-0F

      LABEL-

INSTRUCTION-CALL

   OPERAND1-read_word_from_slave

   OPERAND2-

    COMMENT-

    ADDRESS-10

      LABEL-

INSTRUCTION-CALL

   OPERAND1-write_a_word_to_master

   OPERAND2-

    COMMENT-

    ADDRESS-11

      LABEL-

INSTRUCTION-

   OPERAND1-

   OPERAND2-

    COMMENT-; (SECTOR WORDS READED)-1

    ADDRESS-11

      LABEL-

INSTRUCTION-SUB

   OPERAND1-s5

   OPERAND2-01

    COMMENT-

    ADDRESS-12

      LABEL-check_sectors_words_readed

INSTRUCTION-

   OPERAND1-

   OPERAND2-

    COMMENT-

    ADDRESS-12

      LABEL-

INSTRUCTION-

   OPERAND1-

   OPERAND2-

    COMMENT-; IF sector_words_readed = 0 THEN READ_NEW_SECTOR

    ADDRESS-12

      LABEL-

INSTRUCTION-

   OPERAND1-

   OPERAND2-

    COMMENT-; IF sector_words_readed > 0 THEN TRANSFER_WORD_TO_MASTER

    ADDRESS-12

      LABEL-

INSTRUCTION-AND

   OPERAND1-s5

   OPERAND2-s5

    COMMENT-

    ADDRESS-13

      LABEL-

INSTRUCTION-CALL

   OPERAND1-Z

   OPERAND2-check_sector_per_cluster_readed

    COMMENT-

    ADDRESS-14

      LABEL-

INSTRUCTION-JUMP

   OPERAND1-idle

   OPERAND2-

    COMMENT-

    ADDRESS-15

      LABEL-track_new_cluster

INSTRUCTION-

   OPERAND1-

   OPERAND2-

    COMMENT-

    ADDRESS-15

      LABEL-

INSTRUCTION-

   OPERAND1-

   OPERAND2-

    COMMENT-; save the number of dummy reads that must be done when the fat sector will be readed

    ADDRESS-15

      LABEL-

INSTRUCTION-

   OPERAND1-

   OPERAND2-

    COMMENT-; an are stored into s5 register

    ADDRESS-15

      LABEL-

INSTRUCTION-

   OPERAND1-

   OPERAND2-

    COMMENT-; in s0 bits 6-0 of the cluster number (offset in the sector -> 256 words-fat16 entries)

    ADDRESS-15

      LABEL-

INSTRUCTION-

   OPERAND1-

   OPERAND2-

    COMMENT-; as is each read operation a word is readed no multiplication is needed

    ADDRESS-15

      LABEL-

INSTRUCTION-

   OPERAND1-

   OPERAND2-

    COMMENT-; RESTORE CLUSTER NUMBER

    ADDRESS-15

      LABEL-

INSTRUCTION-INPUT

   OPERAND1-s0

   OPERAND2-TMP_IN_4

    COMMENT-

    ADDRESS-16

      LABEL-

INSTRUCTION-INPUT

   OPERAND1-s1

   OPERAND2-TMP_IN_5

    COMMENT-

    ADDRESS-17

      LABEL-

INSTRUCTION-INPUT

   OPERAND1-s2

   OPERAND2-TMP_IN_6

    COMMENT-

    ADDRESS-18

      LABEL-

INSTRUCTION-INPUT

   OPERAND1-s3

   OPERAND2-TMP_IN_7

    COMMENT-

    ADDRESS-19

      LABEL-

INSTRUCTION-

   OPERAND1-

   OPERAND2-

    COMMENT-;

    ADDRESS-19

      LABEL-

INSTRUCTION-

   OPERAND1-

   OPERAND2-

    COMMENT-; compose LBA address of the sector of the fat that must be readed

    ADDRESS-19

      LABEL-

INSTRUCTION-

   OPERAND1-

   OPERAND2-

    COMMENT-;

    ADDRESS-19

      LABEL-

INSTRUCTION-

   OPERAND1-

   OPERAND2-

    COMMENT-; SHIFT RIGHT 15-8 TO 7-0

    ADDRESS-19

      LABEL-

INSTRUCTION-

   OPERAND1-

   OPERAND2-

    COMMENT-;

    ADDRESS-19

      LABEL-

INSTRUCTION-LOAD

   OPERAND1-sF

   OPERAND2-07

    COMMENT-

    ADDRESS-1A

      LABEL-do_shift

INSTRUCTION-

   OPERAND1-

   OPERAND2-

    COMMENT-

    ADDRESS-1A

      LABEL-

INSTRUCTION-SR0

   OPERAND1-s3

   OPERAND2-

    COMMENT-

    ADDRESS-1B

      LABEL-