 | This article includes a list of general references, but it lacks sufficient corresponding inline citations. (November 2014) |
 HP 48GX | |
| Type | Programmable Scientific Graphing |
|---|---|
| Manufacturer | Hewlett-Packard |
| Introduced | 1990 |
| Discontinued | 2003[1] |
| Predecessor | HP-28S |
| Successor | HP 49G |
| Cost | 350 USD |
| Calculator | |
| Entry mode | RPN |
| Precision | 12 BCD digits, exp ±499 |
| Display type | TN LCD |
| Display size | 131×64 pixels |
| CPU | |
| Processor | Clarke 1LT8 (Saturn core for the HP48S series) Yorke HP 00048-80063 (Saturn core for the HP48G series) |
| Frequency | 2–4 MHz |
| Programming | |
| Programming language(s) | RPL / Saturn Machine language |
| User memory | HP 48S series: 32 KB HP 48G series: 32 to 128 KB |
| Firmware memory | HP 48S series: 256 KB HP 48G series: 512 KB |
| External memory | HP 48SX: Ports 1 and 2 (merged): 256 KB HP 48GX: Port 1: 128 KB Port 2: 4,096 KB (4 MB) |
| Interfaces | |
| Connection | 4-pin RS-232, HP-IR |
| Ports | Serial, Infrared, Kermit (protocol), (Xmodem added on G series) |
| Other | |
| Power supply | 4.5 V (3× AAA battery) |
| Weight | 0.25 kg (0.55 lb) |
| Dimensions | 17.9×7.9×2.8 cm (7.05×3.11×1.1 inch) |
The HP 48 is a series of graphing calculators designed and produced by Hewlett-Packard from 1990 until 2003.[1] The series includes the HP 48S, HP 48SX, HP 48G, HP 48GX, and HP 48G+, the G models being expanded and improved versions of the S models. The models with an X suffix are expandable via special RAM (memory expansion) and ROM (software application) cards. In particular, the GX models have more onboard memory than the G models. The G+ models have more onboard memory only. The SX and S models have the same amount of onboard memory.
Note that the similarly named hp 48gII (2004) is not a member of the series but closely related to the HP 49G+.
The calculators use Reverse Polish Notation (RPN) and the RPL programming language. The hardware architecture developed for the HP 48 series became the basis for the HP 38G, with a simplified user interface and an infix input method, and the HP 49G with various software enhancements. Likewise, the hardware and software design of the HP 48 calculators are themselves strongly influenced by other calculators in the HP line, most of all by the HP-18C and the HP-28 series.