July 15, 2012 – Vernon Hester Software Now in Public Domain

July 15, 2012 – Vernon Hester Software Now in Public Domain


Vernon Hester, author of MultiDOS and many other programs, has asked that I post the following statement:

     Any software that I have written that you have in your possession and any software available on www.trs-80.com may be freely distributed without restriction.     
     I hereby place all of my software in the public domain.     
     This includes any and all versions of: ZEUS, MULTIDOS, ESOTERIC, ASTROCAL, and Z’DOS.     
     No warranties are expressed or implied, and support will be available on a limited basis.     

Vernon continues to provide additional copies of his DOS’s, additional information on the MultiDOS page, and is willing to take Q&A. Thank you so much Vernon for your generosity.

June 11, 2012 – MultiDOS History / Info / Download Pages

June 11, 2012 – MultiDOS History / Info / Download Pages



I have been working with Vernon Hester for over a year to compile the history of MultiDOS, provide downloads for existing copies of MultiDOS, and include any information for each release that Vernon could remember. While the pages (there are FIVE) are still in the works, Vernon’s schedule has been a bit hectic, so while the pages are not yet done yet, he has allowed me to make them public. The link can be found on the right navbar under DOS’s or Right Here. Thank you Vernon!

March 29, 2012 – New Model I MultiDOS Downloads thanks to Vernon B Hester

March 29, 2012 – New MultiDOS Downloads thanks to Vernon B Hester


Vernon B. Hester, author of MultiDOS and other wonderful programs, has provided some additional copies of his DOS’s for the Model I:

  •   MultiDOS v1.60S (Single Density)
  •   MultiDOS v1.60D (Double Density)
  •   MultiDOS v1.60P (Pseudo Density)*
  •   MultiDOS v1.60aS (Single Density)
  •   MultiDOS v1.60aD (Double Density)
  •   MultiDOS v1.60aP (Pseudo Density)*
* = Does not seem to work well with v1.26 of Matthew Reed’s TRS32 Emulator; I have sent the images to Matthew for review.

January 16, 2012 – New Model I MultiDOS Downloads

January 16, 2012 – New Model I MultiDOS Downloads thanks to Vernon B Hester


Vernon B. Hester, author of MultiDOS and other wonderful programs, has provided some additional copies of his DOS’s:

  •   MultiDOS v1.13 (Single Density)
  •   MultiDOS v1.14 (Single Density)
  •   MultiDOS v1.15 (Single Density)
  •   MultiDOS v1.16a (Single Density)
  •   MultiDOS v1.17 (Single Density)
  •   MultiDOS v2.00 (Double Density)
  •   MultiDOS v2.10 (Double Density)
He also supplied 4 others, but they are all problematic in one way or another and will not work, due to his lack of a working Model I. I have reached out to him to see what exactly he needs and will let everyone know, in case they can help.

January 4, 2011 – New Downloads thanks to Vernon B Hester

January 4, 2012 – New Downloads thanks to Vernon B Hester


Vernon B. Hester, author of MultiDOS and other wonderful programs, has provided some additional copies of his DOS’s:

Model I
  •   MultiDOS v4.01 [a] for Model I
Model III
  •   MultiDOS v1.0 for Model III
  •   MultiDOS v1.3a for Model III
  •   MultiDOS v1.6 for Model III
  •   MultiDOS v1.7 for Model III
  •   MultiDOS v1.71 for Model III
  •   MultiDOS v2.10 for Model III
  •   MultiDOS v4.01 [a] for Model III
Model 4
  •   Esoteric DOS v2.12 for Model 4
  •   Esoteric DOS v2.12 High-Resolution BASIC for Model 4
  •   MultiDOS v5.11 [a] for Model 4
  •   MultiDOS v5.11 High-Resolution BASIC for Model 4