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-
-
- Some notes first:
- =================
-
- Now that you have installed JVFAX 7.1 on your hard disk you should
- first read the file 'NEWS.DOC' to find out what's new in this version.
- A complete instruction manual can be found in the file 'ENGLISH.DOC'
- in the DOCS directory.
- Eventually, you should print this documentation, e.g. by:
-
- 'COPY ENGLISH.DOC LPT1'
-
- Please set your printer to 12 cpi before printing this file.
-
- A small overviev of the different types of demodulators, modulators,
- and some addresses of hardware suppliers can be found in the
- file 'INTERF.DOC. (DOCS directory)
-
-
- IMPORTANT:
- ==========
-
- If you want to use JVFAX for the transmission of FAX-/SSTV-pictures
- you have the choice of three different methods of audio generation.
-
- 1) by an external modulator, such as is contained in the 'EASYFAX'
- for example. (Configuration setting 'serial port', or
- 'parallel port' in the modulator field.)
-
- 2) by the built in PC speaker. You will have do do some wiring to
- get the signal out of the computer. (see INTERF.DOC)
- (Configuration setting 'speaker')
-
-
- 3) by the TxD-pin of any serial port. Here, an audio signal
- is directly generated at the transmit data pin of the serial
- port. Just as in 2), you will have to do some filtering. See
- INTERF.DOC. (Configuration setting: 'serial audio')
-
-
- Best results can be obtained when using method 1).
- When using method 2), results will be good, but on slow machines it
- might be necessary not to load any memory managers such as EMM 386
- or QEMM etc.
- Only HIMEM.SYS should be loaded to enable the access to XMS memory.
- When using Method 3), it's an absolute 'must' not to load memory
- managers such as QEMM, EMM386 etc. (Exceptions: You're running a
- '486 or pentium computer)
- Without memory managers loaded, and with a not too slow computer,
- the results using method 3) should be surprisingly good,
- especially when you keep in mind that you won't have to do any
- hardware modifications to your computer and that the external parts
- for low pass filtering can be obtained for less than 2 US-$.
- Other than former JVFAX versions this 7.0 version supports full
- 64 gray scale audio generation when using the 'serial audio' setting.
-
-
- When recieving with a comparator type or 'HAMCOMM' interface, you should
- also avoid to load the above mentioned memory managers.
-
-
- If you're a programmer yourself and if you should wish to make some
- 'nasty' interfaces cooperate with JVFAX you should study the
- file 'JVTSR.PAS' in the DOCS directory.
-
- If you should have further questions regarding JVFAX you should ask
- an 'expert' in your neighbourhood.
- Please avoid calling me by phone.
- My wife and children are normally very tolerant what concerns my
- hobby. But they always are getting quite angry when I'm hanging
- on the phone all the evening.
- So, please do only call in cases of 'emergency'. This will perhaps
- guarantee that some time in the future, there might be a JVFAX 8.0.
-
- Just as its predecessors, JVFAX 7.1 is freeware.
- This means in special that you need not pay for using this program.
- If however, you feel that you should do something good to me by
- sending some kind of donation you can do so without having to fear
- that I will get angry about it.
-
- Note:
- I do not offer or produce any hardware which could be used JVFAX.
- See file 'INTERF.DOC' for the addresses of some interface suppliers.
-
-
- Finally, have fun using JVFAX 7.1 and accept my apologies for my
- ugly English.
-
-
- Mettmann, December 1995
-
-
- Eberhard Backeshoff
-
-