HP 9830A is a sophisticated programmable calculator, it's actually an early desktop computer with printer. It was introduced in 1972, was the top of the 9800 line; having BASIC interpreter in read-only memory (ROM). The model was discontinued late in the 1970s.
Run by operating system ROM BASIC, expandable with ROM cartridges. Powered by processor based on HP 2100 with stack. The system is also equipped with 16 kB ~ 64 kB memory.
All 98x0 and 9821 systems used the same I/O interfaces. A 400 line per minute 80-column thermal line printer was designed to fit on top of the 9820 and 9830.
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