IBM 5100

[Tony Duell]

> 
> On 7 Aug 2004 at 22:53, Tony Duell wrote:
> 
> > One day I must assemble the [HP 9830] terminal emulator ROM code from
> > the patent.... 
>  
> You had mentioned in an earlier post the (U.S.) patent numbers for the 
> 9810, 9820, and 9830.  Would you have a list of others related to those 
> units, e.g., for the ROM mentioned above?  (Or is it contained in 
> 4,012,725; I confess that I haven't read the entire patent...being 590 
> pages, it's a bit slow going! :-)

The useful patents I know of for these machines are : 
HP9810 : US3859635
HP9820 : US3839630
HP9830 : US4012725 (or GB1444141)

The ROM source I mentioned is in that 9830 patent -- as you said it's a 
thick document ;-). In general you get most of the system firmware and 
the option ROMs as source listings

Do be warned that there may well be differences between the machines in 
the patent and the production machines. There are certainly hardware 
differnces, and the firmware may have changed too (so that system 
routines may be at other addresses, etc). But there's a heck of a lot of 
good stuff in those patents that will point you in the right direction 
if, for example, you are insane enough to want to disassemble one of the 
ROMs...

-tony