HP-48SX

Boots the authentic HP-48SX (1990) system ROM to the RPL stack display. The HP-48SX is the first HP-48 — the "Scientific eXpandable" model, with two plug-in card ports. Type on the on-screen HP-48 keyboard, or use your physical keyboard for the digits, + − × ÷, ENTER, the arrow keys and DEL (ESC = ON). Open the debugger to single-step the Saturn processor, read and write its A/B/C/D field registers and nibble memory, and set execution breakpoints and write watchpoints. It reuses the shared hpemu Saturn core; the SX system ROM is swapped into the core at boot. The HP-48SX system ROM is copyright Hewlett-Packard, self-hosted for emulation.