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UPGRADEE.TXT
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1994-08-06
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6KB
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175 lines
UPGRADE-E to K3BC SSTV
As in past upgrades, the detailed information is contained in
the Instruction Manual, TVINFO.TXT. At the end of each item summary
below, the paragraph to read for details is listed in parenthesis.
(1) We have added a REAL TIME copying capability for folks
with the TRUCOLOR video card and a reasonably fast computer (esti-
mated to be a 386-25 mhz or thereabouts). Hopefully this will push
more of you to make the jump to TRUCOLOR. (RT.BAS)
(2) We added a new B/W mode---sort of. It's really the FAX480
mode except it has a VIS code attached instead of the lengthy 20
line header of the original 480. In receive, you can manually start
it, as before, to copy FAX480. Or put it in AUTO mode and it will
automatically pick up other B/W FAX pictures transmitted by this
system. In transmit, you can pick the B/W FAX (mode 9) or still
pick the old FAX480 header (mode 95). Since there are a surprising
number of people just collecting pictures in the AUTO mode, they
will enjoy your B/W's if you use mode 9 in Transmit. The picture
files are interchangeable and both use the .FAX suffix. (ANOTHER
MODE)
(3) Added a new tuning screen to RT which can be used to look
at the incoming signal in a frequency vs. time format. You can
compare incoming line SYNC and/or VIS frequencies with the screen
reference marks to see how far off the other guy's frequency you
are. This is available in real time as a series of snapshots, or to
avoid disturbing copying, the tune screen is available after copy-
ing and you can browse through the entire pix file. (RT.BAS)
(4) Added a tune-up 1200 cps pulsing tone to VT.BAS to give
others a reference to tune to before transmitting your picture.
This gets calibrated when you set HF in VT.BAS. It is activated by
keying T (for Tone) before keying G to start sending.(VT.BAS)
(5) A different technique for getting the Transmit program
calibrated on frequency is described using a standard VCR. (VT.BAS)
(6) KY1S has chained together our conversion and transmit
programs with the Alchemy (shareware) format conversion program to
give seamless operation from choosing a GIF, PCX, or JPG file name
to transmitting the pix in any mode chosen. Since some of you have
asked about GIF, in particular, we include mention of Dennis's work
here. His latest version should be available on Elmer's BBS:tel
(302)945-7224 (give your call sign on first call and Elmer will put
you on access list). KY1S's address is 748 Cooper Road, Alexander,
ME 04694. or on packet WA1GAV @ ME.USA.NA.
(7) As I was wrapping up this revision, I received a copy of
Alchemy from KY1S. Using the batch file chaining described in
revision D, I made a quick pass at transmitting GIF, PCX, JPG, etc.
The batch file created, TR.BAT, uses modified versions of
TIFCONV.BAS and VT.BAS. We called them ALCHCONV.BAS (lines 25, 205,
250, 282, and 240 in TIFCONV.BAS are changed) and ALCHVT.BAS (lines
13, 14, 15, 150, and 151 are deleted and lines 40, 140, 143, 152,
170, and 2092 are changed in VT.BAS). Note that you need to change
the SYSTEM CONFIGURATION in these new programs to match what
you've already put into TIFCONV.BAS and VT.BAS.
Now to transmit from any format that Alchemy accepts as an
input, just type:
C:\TV>tr Path\FileName(with suffix) RAMDISK
That is, if you have a GIF file named EARTH.GIF in the E:
drive in a subdirectory named GIF and your RAMDISK assigned letter
was "d", you type:
C:\TV>tr e:\gif\earth.gif d
Now just answer what mode you want and the picture will appear
ready to transmit. As in VT, just hit G to start transmitting. You
will probably want to simplify further. TE.BAT is an example where
the above is accomplished with typing only: C:\TV> te earth
Read ALCHEMY.DOC to find out what it covers. Also read TR.BAT
to see how easy it is to chain with batch files. Further look at
the lines changed in TIFCONV and VT to see how simple this all is
and why the lines were changed (ie; LIST changed lines after load-
ing ALCHCONV---do the same for ALCHVT). Adding the PCXLABEL program
is left to the reader (Hint; exit ALCHCONV with d:a.s1, etc. in-
stead of d:a.p). You can avoid typing the RAMDISK every time by
replacing %2 in TR.BAT with your RAMDISK letter.
Don't forget to transfer your already determined SYSTEM CON-
FIGURATION choices to the new program. Particularly note the many
switch choices now available in lines 3200-3300 in RT.BAS. If you
only have a 256 color card be sure to set TC=0 (line 3250).
Have fun,
Ben Vester, K3BC
8/5/94