OASIS was a popular operating system used for business in the late 1970’s through the 1980’s on Z80-based computers.
oasis can list and extract files from OASIS disk images, preserving file dates.
The filename in OASIS can be up to eight characters, with an eight character extension. Each file has an associated file type:
| Description | Metadata | Output Filename |
| Relocatable | record length | fname.ftype_R_<metadata> |
| Absolute | load address | fname.ftype_A_<metadata> |
| Sequential | record length of longest record | fname.ftype_S_<metadata> |
| Direct | allocated record length | fname.ftype_D_<metadata> |
| Indexed | Not supported | |
| Keyed | Not supported |
In addition to the file name and extension, the OASIS filesystem stores metadata about certain types of files. For executable object code, the “load address” is stored in the metadata. To preserve this important information, nsdos appends the load address to the output filename extension.
OASIS File Utility (c) 2021 - Howard M. Harte
https://github.com/hharte/oasis-utils
usage is: oasis <filename.img> [command] [<filename>|<path>] [-q] [-a]
<filename.img> OASIS Disk Image in .img format.
[command] LI - List files
EX - Extract files to <path>
Flags:
-q Quiet: Don't list file details during extraction.
-a ASCII: Convert line endings and truncate output file at EOF.
If no command is given, LIst is assumed.
$ oasis <filename.img>
Or
$ oasis <filename.img> li
For example:
$ oasis OASIS_Users_Group_Vol01.img
Label: VOL$1
77-1-13
112 directory entries
23K free
Fname--- Ftype-- --Date-- Time- -Recs Blks Format- -Sect Own SOw Other-
BLKFRI2 BASICOBJ 06/19/81 18:50 362 10 S 85 16 0 0 54 E
LEM BASICOBJ 06/19/81 19:22 233 6 S 129 76 0 0 98 E
COMPILE EXEC 02/29/81 17:09 45 2 S 74 764 0 0 769 E
PURGE EXEC 12/24/80 15:23 82 2 S 57 556 0 0 562 E
PERFRMCE ARTICLE 02/15/82 18:24 172 9 S 75 476 0 0 509 E
HARDDISK ARTICLE 09/04/81 16:39 27 2 S 75 736 0 0 741 E
SERVICE INFORMTN 06/15/81 16:49 66 4 S 76 772 0 0 784 E
ADVENTUR WORK 05/14/80 00:00 200 50 D 256 112 0 0
ADVENTUR COMMAND 05/14/80 00:00 98 25 R 256 564 0 0 20300 L
NEWS LETTER1 06/11/82 21:25 77 4 S 70 836 0 0 849 E
CHASE BASICOBJ 06/19/81 18:53 111 3 S 65 100 0 0 109 E
WUMPUS BASICOBJ 06/19/81 19:15 301 8 S 78 396 0 0 424 E
REPEAT EXEC 11/19/80 19:44 24 1 S 61 552 0 0 554 E
HEXAPAWN BASICCOM 07/28/80 17:15 176 5 S 61 708 0 0 727 E
YAHTZEE BASICCOM 09/23/80 13:05 282 7 S 117 428 0 0 452 E
SOFTWARE GUIDE 08/29/81 17:33 69 4 S 71 512 0 0 524 E
RUN$ EXEC 08/10/81 16:21 26 1 S 67 744 0 0 746 E
VOL1 EXEC 06/11/82 19:20 416 13 S 73 312 0 0 362 E
ADVENTUR MEMO 04/10/80 00:00 60 3 S 62 384 0 0 394 E
GAMES EXEC 05/27/81 16:20 47 2 S 66 788 0 0 792 E
POETRY BASICOBJ 03/13/81 15:20 116 4 S 81 796 0 0 808 E
DLRADVCE ARTICLE 05/10/82 11:34 129 8 S 75 852 0 0 882 E
LOAN BASICOBJ 06/19/81 19:08 73 2 S 81 528 0 0 533 E
LANDER BASICOBJ 06/19/81 18:58 122 4 S 66 536 0 0 549 E
AMAZE BASICOBJ 06/19/81 18:46 187 4 S 73 748 0 0 762 E
DEALER COSTINFO 06/15/81 16:41 71 4 S 76 676 0 0 688 E
OASIS HARDWARE 02/09/82 13:23 22 1 S 73 884 0 0 886 E
QUALITY ARTICLE 05/10/82 11:37 54 3 S 75 64 0 0 75 E
S$TREK BASICOBJ 05/08/81 18:19 211 5 S 56 456 0 0 473 E
LANGUAGE ARTICLE 06/15/81 16:37 100 5 S 76 364 0 0 383 E
SERVICE ARTICLE 09/04/81 16:35 56 3 S 75 664 0 0 675 E
$README FIRST1 03/22/82 00:15 77 4 S 75 692 0 0 705 E
EDTORIAL ARTICLE 02/15/82 18:17 68 4 S 75 888 0 0 902 E
BAGELS BASICOBJ 07/21/81 16:25 72 2 S 65 56 0 0 62 E
SELECT1 EXEC 12/01/81 17:22 36 2 S 46 728 0 0 734 E
AWARI BASICCOM 06/04/80 12:37 131 4 S 64 812 0 0 825 E
LOVE BASICOBJ 06/19/81 19:11 36 2 S 113 828 0 0 834 E
COPYRITE NOTICE 05/13/82 18:33 8 1 S 65 904 0 0 905 E
$ oasis <filename.img> ex <path>
For example:
$ oasis OASIS_Users_Group_Vol01.img ex OUG_Files
Label: VOL$1
77-1-13
112 directory entries
23K free
BLKFRI2.BASICOBJ -> OUG_Files/BLKFRI2.BASICOBJ_S_85 (9906 bytes)
LEM.BASICOBJ -> OUG_Files/LEM.BASICOBJ_S_129 (5842 bytes)
COMPILE.EXEC -> OUG_Files/COMPILE.EXEC_S_74 (1524 bytes)
PURGE.EXEC -> OUG_Files/PURGE.EXEC_S_57 (1778 bytes)
PERFRMCE.ARTICLE -> OUG_Files/PERFRMCE.ARTICLE_S_75 (8636 bytes)
HARDDISK.ARTICLE -> OUG_Files/HARDDISK.ARTICLE_S_75 (1524 bytes)
SERVICE.INFORMTN -> OUG_Files/SERVICE.INFORMTN_S_76 (3302 bytes)
ADVENTUR.WORK -> OUG_Files/ADVENTUR.WORK_D_256 (51200 bytes)
ADVENTUR.COMMAND -> OUG_Files/ADVENTUR.COMMAND_R_256 (25088 bytes)
NEWS.LETTER1 -> OUG_Files/NEWS.LETTER1_S_70 (3556 bytes)
CHASE.BASICOBJ -> OUG_Files/CHASE.BASICOBJ_S_65 (2540 bytes)
WUMPUS.BASICOBJ -> OUG_Files/WUMPUS.BASICOBJ_S_78 (7366 bytes)
REPEAT.EXEC -> OUG_Files/REPEAT.EXEC_S_61 (762 bytes)
HEXAPAWN.BASICCOM -> OUG_Files/HEXAPAWN.BASICCOM_S_61 (5080 bytes)
YAHTZEE.BASICCOM -> OUG_Files/YAHTZEE.BASICCOM_S_117 (6350 bytes)
SOFTWARE.GUIDE -> OUG_Files/SOFTWARE.GUIDE_S_71 (3302 bytes)
RUN$.EXEC -> OUG_Files/RUN$.EXEC_S_67 (762 bytes)
VOL1.EXEC -> OUG_Files/VOL1.EXEC_S_73 (12954 bytes)
ADVENTUR.MEMO -> OUG_Files/ADVENTUR.MEMO_S_62 (2794 bytes)
GAMES.EXEC -> OUG_Files/GAMES.EXEC_S_66 (1270 bytes)
POETRY.BASICOBJ -> OUG_Files/POETRY.BASICOBJ_S_81 (3302 bytes)
DLRADVCE.ARTICLE -> OUG_Files/DLRADVCE.ARTICLE_S_75 (7874 bytes)
LOAN.BASICOBJ -> OUG_Files/LOAN.BASICOBJ_S_81 (1524 bytes)
LANDER.BASICOBJ -> OUG_Files/LANDER.BASICOBJ_S_66 (3556 bytes)
AMAZE.BASICOBJ -> OUG_Files/AMAZE.BASICOBJ_S_73 (3810 bytes)
DEALER.COSTINFO -> OUG_Files/DEALER.COSTINFO_S_76 (3302 bytes)
OASIS.HARDWARE -> OUG_Files/OASIS.HARDWARE_S_73 (762 bytes)
QUALITY.ARTICLE -> OUG_Files/QUALITY.ARTICLE_S_75 (3048 bytes)
S$TREK.BASICOBJ -> OUG_Files/S$TREK.BASICOBJ_S_56 (4572 bytes)
LANGUAGE.ARTICLE -> OUG_Files/LANGUAGE.ARTICLE_S_76 (5080 bytes)
SERVICE.ARTICLE -> OUG_Files/SERVICE.ARTICLE_S_75 (3048 bytes)
$README.FIRST1 -> OUG_Files/$README.FIRST1_S_75 (3556 bytes)
EDTORIAL.ARTICLE -> OUG_Files/EDTORIAL.ARTICLE_S_75 (3810 bytes)
BAGELS.BASICOBJ -> OUG_Files/BAGELS.BASICOBJ_S_65 (1778 bytes)
SELECT1.EXEC -> OUG_Files/SELECT1.EXEC_S_46 (1778 bytes)
AWARI.BASICCOM -> OUG_Files/AWARI.BASICCOM_S_64 (3556 bytes)
LOVE.BASICOBJ -> OUG_Files/LOVE.BASICOBJ_S_113 (1778 bytes)
COPYRITE.NOTICE -> OUG_Files/COPYRITE.NOTICE_S_65 (508 bytes)
Extracted 38 files.