Hp 21mx loader rom set

[J. David Bryan]

On Sunday, June 28, 2020 at 22:20, CuriousMarc via cctech wrote:

> I also have a 91740-80033/34/35 set which I don't know what it is. Does
> anyone know? 

Those are DS/1000 revision 1826.

Page 3-130 of the HP "Communicator/1000 for Software Update 6.0" 
(5951-6201, December 1992) has a full list of the DS/1000 ROMs and 
revisions, as follows:

  91740-80001/02/03/16 -- Rev. 1740
  91740-80018/19/20/17 -- Rev. 1813
  91740-80033/34/35/48 -- Rev. 1826
  91740-80049/50/51/48 -- Rev. 1913
  91740-80064/65/66/48 -- Rev. 2003 (bad ROMs; withdrawn)
  91740-80067/68/69/48 -- Rev. 2003 (good ROMs)
  91740-80070/71/72/48 -- Rev. 2540 (adds 7974 loader; no DS change)

(The first three ROMs in each entry are the microcode ROMS; the fourth is 
the CBL ROM.)

Pages 3-104 through 3-136 of that document give the firmware revisions of 
all of the HP products then in support.


> Anyhow, looking at the ROMs and dates, I suspect these are E/F
> microcode only and would not work on the 21MX. 

All of the above are E/F-Series only.

                                      -- Dave