On Tue, Jun 24, 2025 at 5:19 AM Steve Lewis via cctalk <[email protected]> wrote: > > We had an operational HP9830 last year at VCF SW (with the attached > printer, it is a wonderful system). While it does "boot to BASIC", as I > recall one expansion cartridge is necessary to support some additional > keywords (like possibly the TRIG functions or some certain operations).
Trig functions (and floating point numbers/variables) are standard on the HP9830. As a aside, the HP9810 and HP9820 calculators (related machines in that they used the same bit-serial processor) did need an extra ROM module for the trig functions There are many expansion ROM modules for the HP9830, including : String Variables. Without this you can print string constants (to label inputs and outputs. for example) but nothing more. This ROM adds the ability to store and manipulate character strings in variables Extended I/O : Essential if you want to use any I/O devices other than the printer and cassette drive, really. Allows binary I/O, use of HPIB (with the appropriate interface), etc Matrices : Adds the MAT statements that were present in original BASIC and missing in most microcomputer versions. This ROM for the HP9830 is surprising common in my experience. -tony
