Updating pocket pc

27-Dec-2017 11:48 by 6 Comments

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The group includes, according to a later Casio manual, the following machines: PB-100, PB-110, PB-220, PB-240, PB-300, PB-410, FX-700P, FX-720P, FX-730P, FX-770P, FX-785P, FX-790P and FX-795P. It is neither ASCII nor compatible with the PB-100 series encoding. The alpha keyboard isn't arranged like a typewriter but in alphabetical order. The tape format has some similarities to the PB-100 series format but seems to be an earlier variant.I own some of them: PB-220, PB-300, FX-700P, FX-720P, FX-730P and FX-795P. Shifted functions are selected by prefix keys which must be pressed and released before the shifted key. The keyboard has a mode key which works pretty much like on the PB-100 series machines. The program to list a tape file is therefore a separate executable while the wave file generator for the PB-100 series (wave730) can create images for the FX-702P.

This is the name Casio gave to a range of its early pocket computers with BASIC.

All models share some common features: A mode key switches between RUN or WRT (program) mode, selects angle modes and redirects output to the optional (or built-in) printer. The internal encoding is not ASCII but something very special. All tape recordings have been done through the FA-2 interface. This is a newer generation of BASIC pockets which lack the mode key.

If you are interested in technical details, see Piotr Piatek's pages on the Internet. Instead, the ENTER key on the numeric keypad is used for direct mode calculations while the return key is for entering commands and BASIC program lines. The internal encoding is ASCII with graphics characters in the extended set.

In most of the cases, the switch The MD-100 lacks a tape interface but who cares when a floppy disk with a real filesystem is readily available?

I own two pocket calculators that connect to the MD-100: the PB-1000 BASIC computer and the PB-2000C which can be programmed in a variant of C (interpreted, quite slow). There is a BASIC ROM OM-53B available for the PB-2000C which turns it essentially into a PB-1000 with a different case, but I haven't seen this yet. This is not a BASIC pocket computer but a Graphic calculator. You may have to set your audio software to a proper sampling rate for reliable reading of the WAV files.

This makes it impossible to edit lines with lowercase strings transmitted from a PB-700 or loaded from a PB-700 file.

I own the PB-700 and PB-770 with the FA-10 interface and the FX-750P with the FA-20.

With its FA-80 interface, you can save programs, registers, graphics and text files to cassette tape. I don't have an interface myself, so development is slow. The program lists the contents as it appears in the file. The Canon X-07 is a capable little machine with a powerful BASIC and a built in cassette interface. The encordings are in fast mode at 1200 baud, a format already supported by the wave library in this project.

Just the low level encoding is a bit different: 8 Bits, no parity, at least 2 stop bits.

I had to adjust the generated wave pattern to make CLOAD work reliably.

The TI-74 is the successor of the CC-40 BASIC computer which failed commercially, because, initially, no mass storage device was available.

The included CETL spreadsheet application is unique.