ZDOS
[UltraDOS 4.1]
(ZDOS v1.0 Boot Screen)
    
Released:
  • September 30, 1982 (Model I/Single Density)
  • November 19, 1982 (Model I/Double Density)
  • November 20, 1982 (Model III)
    Versions:
  • Model I (Single and Double)
  • Model III
    Download Links:
  • Model I/Single Density
  • Model I/Double Density
  • Model III
    Vernon wrote and released Z’DOS as an attempt to get people into something other than TRSDOS at a reasonable cost. Z’DOS v1.0 was never updated
    Contained the following files:
         
    File Function


    BACKUP/CMD Duplicate diskette. Includes format
    BASIC/CMD High level interpreter
    COPY/CMD Duplicate a single file
    CREF/SYS Cross reference for BASIC including reserved words
    DIR/SYS Contains pertinent information about all files on this diskette
    DOS/SYS ?????
    DOS0/SYS ?????
    DOS1/SYS ?????
    DOS2/SYS ?????
    DOS3/SYS ?????
    DOS4/SYS ?????
    DOS5/SYS ?????
    DOS6/SYS ?????
    DOS7/SYS ?????
    DOS8/SYS ?????
    DOS9/SYS ?????
    EDIT/SYS Global editor for BASIC
    ERROR/SYS Error library for BASIC
    FORMAT/CMD Format [blank] diskette
    RENUM/SYS Renumber for BASIC programs
    Contained the following library commands:
         
    APPEND    ATTRIB    AUTO    BLINK    BOOT    BREAK   
    BUILD    CLEAR    CLOCK    CLRDSK    CLS    CONFIG   
    DATE    DDAM    DEAD    DEBUG    DEVICE    DIR   
    DO    DUMP    FORMS    FREE    HASH    HELP   
    KEYBRD    KILL    LIB    LINK    LIST    LOAD   
    PATCH    PRINT    PROT    RENAME    RESTOR    ROUTE   
    SKIP    TIME    TOPMEM    VERIFY   
    [Z'DOS Ad]
    (Ad from 12/82 80 Micro)
    Click to enlarge

    [Z'DOS Ad]
    (Ad from 01/83 80 Micro)
    Click to enlarge
    [Z'DOS Ad]
    (Ad from 03/83 80 Micro)
    Click to enlarge
    [Z'DOS Ad]
    (Ad from 02/84 80 Micro)
    Click to enlarge

    [Z'DOS Ad]
    (Ad from 03/84 80 Micro)
    Click to enlarge

    Esoteric
    [ESOTERIC v2.11 Boot]
    (ESOTERIC v2.11 Boot Screen)
        
    Released:
       
  • July 11, 1998 (Preliminary)
  • December 13, 1998 (v1.0)
  • November 25, 1999 (v1.1)
  • January 1, 2001 (v1.2)
  • August 12, 2002 (v2.0)
  • August 1, 2004 (v2.1)
  • November 29, 2004 (v2.11)
    Versions:
  • Model 4
    Download Links:
  • v2.11 for the Model 4
    What Is Esoteric:
         ESOTERIC is essentially Model 4 MULTIDOS using the Model 4‘s Memory Maps III and IV. MULTIDOS uses Memory Map II. The only benefit (if any) of Model 4 MULTIDOS over ESOTERIC is that Model 4 MULTIDOS can operate in both the 64×16 screen and the 80×24 screen, whereas ESOTERIC is only a 80×24 screen system.
         In a March 1983 San Francisco computer show, LOBO came to Vernon’s booth and they talked about the MAX-80. In April 1983 a MAX-80 arrived in Vernon’s office and he began to convert Model I DOS to work in the MAX-80. The MAX-80 was capable of either 64×16 or 80×24 video. Vernon cobbled a version of BASIC using fragments of the Model I ROM and his Model I/III disk BASIC. The primary purpose of the dual video was to enable an easy transition of Model I/III BASIC programs to a faster machine (5.06667 MHz) without having to rewrite display code. And, the 80×24 screen could be used for new developments and/or converted 64×16 stuff. Programs such as “Android Nim” execute flawlessly in Model 4 MULTIDOS – provided, of course, that one is in the 64×16 video mode.
         Vernon did not want to do a Model 4 MULTIDOS; however, many customers wanted the ‘easier’ transition to a 4MHz/80×24 capable machine. Therefore, Vernon converted his MAX-80 version of MULTIDOS to the Model 4. To be clear, first came the MAX-80 MULTIDOS, and second came the Model 4 version of MULTIDOS. ESOTERIC would have been the Model 4 version of MULTIDOS if Vernon had planned on competing with TRSDOS 6 in either late 1983 and/or early 1984. MAX-80 MULTIDOS hit the streets in September 1983, and Model 4 MULTIDOS was not released until February 1985 – customers were begging. One of the ‘easier’ transitions the Model 4 MULTIDOS provided is the exact matching of 115 of 124 keywords (the nine mismatches are minor).
         Vernon created ESOTERIC in June 1998 (as he had nothing else to do with his Model 4) to gain the 2048 bytes consumed by the permanent address space used for the keyboard and video in Memory Map II. The primary difference between ESOTERIC and Model 4 MULTIDOS is the video (80×24 vs. either 80×24 or 64×16) and ESOTERIC is mapped significantly different than Model 4 MULTIDOS. The mapping of the Model 4 is very similar to the Model I, Model III, and MAX-80 version of MULTIDOS. ESOTERIC’s mapping difference was desired to keep the DOS in contiguous memory (0000H through 1AFFH). Under ESOTERIC, one can ORG applications at 1B00H.
    Contained the following files on the DOS Disk:
       
    File Function


    Allocate/DOL
    BACKUP/CMD
    BASIC/CMD
    BASIC/SEG
    CONVERT/CMD
    CREF/BOL
    CUSTOM/CMD
    Close/DOL
    Command/DOL
    DBLFIX/CMD
    DDT/CMD
    DIR/SYS
    Debug/DOL
    EDIT/BOL
    ERROR/BOL
    ESORES/SYS
    Error/DOL
    FIXDATE/CMD
    FORMAT/CMD
    FU/CMD
    GRAF/BOL
    INSTALL/CMD
    LO/CMD
    LIBRARY1/EXT
    LIBRARY2/EXT
    LIBRARY3/EXT
    MEM/CMD
    MEMDISK/CMD
    MODULE/CMD
    MONITOR/CMD
    MRHARD/CMD
    Minidos/DOL
    Open/DOL
    PACK/BOL
    PCOPY/CMD
    PRT/CMD
    RA/CMD
    RENUM/BOL
    RESOLVE/BOL
    RS/CMD
    SETCOM/CMD
    SHOW/CMD
    SORT/BOL
    SSAVER/CMD
    TE/CMD
    TWO/IDO
    UNPACK/BOL
    UTIL/BOL
    UTIL2/BOL
    ZAP/CMD
    Contained the following files on the UTILITIES Disk:
       
    File Function


    ANNUITY/CAL
    ASTROCAL/CMD
    BCBIG/CMD
    BCLOCK/CMD
    BCPATCH/CMD
    BCTEST/CMD
    CAL/IDO
    CALENDAR/BAS
    CARDL/BAS
    CLJVPAT/CMD
    CLJVTEST/CMD
    CLMRPAT/CMD
    CLMRTEST/CMD
    CUBESOL/BAS
    DECTOHEX/CAL
    ERR/BAS
    FRAC/BAS
    MEGADISK/CMD
    OTHELLO/BAS
    SORTVIS4/BAS
    SQRSUM/BAS
    STRCOLL/BAS
    TCBIG/CMD
    TCPATCH/CMD
    TCTEST/CMD
    TEST/CAL
    XMEMDISK/CMD
    XMONITOR/CMD
    Z80Z/ASM
    ZEUS/CMD
    Contained the following library commands:
         
    APPEND    ATTRIB    AUTO    BLINK    BUILD    CAT   
    CDIR    CLEAR    CLOCK    CLRDSK    CLS    COMP   
    CONFIG    COPY    DATE    DEBUG    DEVICE    DIR   
    DO    DUMP    FMAP    FORMS    FREE    LIB   
    LINK    LIST    LOAD    PATCH    PROT    REMOVE   
    RENAME    RESET    RESTOR    ROUTE    SCREEN    SPOOL   
    TIME    TOPMEM    TYPE    VERIFY   

    Esoteric v2.12
    [ESOTERIC v2.12 Boot]
    (ESOTERIC v2.12 Boot Screen)
        
    Released:
       
  • July 11, 2011 (v2.12)
    Versions:
  • Model 4
    Download Links:
  • v2.12 for the Model 4
  • v2.12 w/High-Res BASIC for the Model 4
    v2.12 contained the following files on the DOS Disk:
       
    File Function


    Allocate/DOL    
    BACKUP/CMD    
    BASIC/CMD    
    BASIC/SEG    
    Close/DOL    
    Command/DOL    
    CONVERT/CMD    
    CREF/BOL    
    CUSTOM/CMD    
    DBLFIX/CMD    
    DDT/CMD    
    Debug/DOL    
    DIR/SYS    
    EDIT/BOL    
    ERR/BAS    
    ERROR/BOL    
    Error/DOL    
    ESORES/SYS    
    FIXDATE/CMD    
    FORMAT/CMD    
    FU/CMD    
    GRAF/BOL    
    INSTALL/CMD    
    LIBRARY1/EXT    
    LIBRARY2/EXT    
    LIBRARY3/EXT    
    LO/CMD    
    MEM/CMD    
    MEMDISK/CMD    
    Minidos/DOL    
    MODULE/CMD    
    MONITOR/CMD    
    MRHARD/CMD    
    Open/DOL    
    PACK/BOL    
    PCOPY/CMD    
    PRT/CMD    
    RA/CMD    
    RENUM/BOL    
    RESOLVE/BOL    
    RS/CMD    
    SETCOM/CMD    
    SHOW/CMD    
    SORT/BOL    
    SSAVER/CMD    
    TE/CMD    
    TWO/IDO    
    UNPACK/BOL    
    UTIL/BOL    
    UTIL2/BOL    
    ZAP/CMD    
    v2.12 contained the following files on the UTILITIES Disk:
       
    File Function


    ANNUITY/CAL    
    ASTROCAL/CMD    
    BCBIG/CMD    
    BCLOCK/CMD    
    BCPATCH/CMD    
    BCTEST/CMD    
    BOOT/SYS    
    CAL/IDO    
    CALENDAR/BAS    
    CARDL/BAS    
    CLJVPAT/CMD    
    CLJVTEST/CMD    
    CLMRPAT/CMD    
    CLMRTEST/CMD    
    CUBESOL/BAS    
    DECTOHEX/CAL    
    DIR/SYS    
    FRAC/BAS    
    MEGADISK/CMD    
    MEGAMAP/CMD    
    OTHELLO/BAS    
    PAGE21/CAL    
    PAGE27/CAL    
    PAGE28/CAL    
    PAGE32/CAL    
    PAGE37/CAL    
    PAGE62/CAL    
    PAGE63/CAL    
    PAGE78/CAL    
    PAGE90/CAL    
    PAGE92/CAL    
    PAGE94/CAL    
    PRECMATH/BAS    
    RCBIG/CMD    
    RCLOCK/CMD    
    ROOT/BAS    
    SORTVIS4/BAS    
    SQRSUM/BAS    
    STRCOLL/BAS    
    TCBIG/CMD    
    TCPATCH/CMD    
    TCTEST/CMD    
    TEST/CAL    
    TRUTH/BAS    
    XESORES/SYS    
    XMEMDISK/CMD    
    XMONITOR/CMD    
    Z80Z/ASM    
    ZEUS/CMD    
    Contained the following 40 library commands:
         
    APPEND    ATTRIB    AUTO    BLINK    BUILD    CAT   
    CDIR    CLEAR    CLOCK    CLRDSK    CLS    COMP   
    CONFIG    COPY    DATE    DEBUG    DEVICE    DIR   
    DO    DUMP    FMAP    FORMS    FREE    LIB   
    LINK    LIST    LOAD    PATCH    PROT    REMOVE   
    RENAME    RESET    RESTOR    ROUTE    SCREEN    SPOOL   
    TIME    TOPMEM    TYPE    VERIFY   

    Navigation
    … continue to Part 6: Q&A With Vernon Hester
    … go back to Part 1: Main MultiDOS/UltraDOS/Z’DOS/ESOTERIC Page
    … go back to Part 2: ULTRADOS
    … go back to Part 3: MultiDOS v1.0 – v1.72
    … go back to Part 4: MultiDOS v2.0 – v5.11

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