Pocket Viewer

The Pocket Viewer (PV ) are a series of the manufacturer Casio PDA.

The Pocket Viewer is a low-budget PDA the Casio, who competed in the beginning with the little Palm models. The PVs using a specially developed by Casio operating system ( PVOS ), which are typical for PDAs standard applications ( address book ( "Contacts" ), agendas, notes ( " Memo" ), handwritten notes ( " Quick-Memo " ), expense manager, world clock, calculator ) provides. In the series of PV - SX50, SX60 PV and PV - S1600 models an extensive spreadsheet is also included.

Basic Properties

• Display: Monochrome touchscreen display
• EL backlight (except PV -100)
• Power supply: 2 AAA round cells
• Battery life of approximately 160 hours (PV - S1600: 120) According to Casio
• Interface: RS -232 (PV - S1600: USB)
• Operating System: PVOS

History

With the PVs Casio offered from 1999 Budget PDA as an adjunct to high-priced Cassiopeia series and the Business Navigator.

After the second PV generation start Casio released an operating system update and an SDK so that it was possible to write your own programs for PVs from the second generation. There is now a lively community that develops programs and games for the PV. So there are now a mature text editor, many database programs, scientific calculator, function plotter, games of all kinds, operating system patches and even a compiler / interpreter for a BASIC dialect called OWBasic.

With OWBasic it is possible to write programs on the PV itself, and to test, so there is a both beginner-friendly and powerful alternative for programming the PV with the SDK and the C programming language. OWBasic thus made ​​the program a broad user base accessible and not insignificantly contributed to the popularity of the PV.

In 2006, Casio took the PV officially out of the product range. Nevertheless, there still exists a PV community that developed dedicated projects.

Model Overview

PV -200

2 MB

PV -270

2 MB

PV - 450X

4 MB

PV -400A

4 MB

PV - S450

4 MB

PV - 400PLUS

4 MB

PV - S660

4 MB

PV S600Plus

4 MB

The PV -750, it is possible with the IrDA port to ship via a GSM-enabled mobile phone emails and receive. The PV - 750Plus SMS can be sent in addition, also can be the address directory of the mobile phone to synchronize with that of the PV. With Casio an operating system update for the PV -750 is available, which gives the functionality of PV 750Plus him.

PV - 750Plus

PV - 750Plus

PV - S450

PV - S450

PV S400Plus

PV - S660

PV - S1600

Technical details

The PVs of the 1st to 4th generation have a NEC V30MZ 80186 - compatible processor at 20 MHz, 128 KB RAM, 1, 2 or 4 MB flash RAM for data and 1 MB flash ROM for the operating system and 1 MB Flash ROM for add-ins (not for PV-100/-200, PV-200A/-400A, PV-200e/-400Plus ).

The PV - S1600 uses a 32 -bit SH-3 processor from Hitachi and 8 MB RAM, 12 MB ​​flash RAM and 4 MB flash ROM for the operating system. While the processor is more efficient than the 16 -bit processors, the other PVs, but the applications are not interchangeable because the processor architectures are not compatible with each other. An exception in this case OWBasic programs because OWBasic is an interpreted language and exists for the PV - S1600 a OWBasic version. In addition, the APIs of both series are the same so that can be ported with reasonable effort except for a few small things, and native programs.

Since the PV models of the first to fourth generation using a 16 -bit processor, the memory is segmented. This is particularly noticeable in the limit of up to 16 add-ins noticeable, which does not exist in the PV - S1600 ( but which can be circumvented with special programs such as PVAddIn Manager).

The file system of PVOS is divided according to modes and submodes. Each data record is part of a file, which is indicated by mode and submode. Depending on the mode records are either binary or text format ( null-terminated ). Binary records are on 3 KB or 32 KB ( records that are greater than 3 KB, can only be loaded into the far- segment, PV - S1600: no restriction ), text data sets for 2 KB (PV - S1600: 32 KB) limited.