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TPUG - Toronto PET Users Group
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TPUG Users Group CD
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CRS
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crs12.d81
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term1.arc
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T18HLP.SDA
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T18H1200 BIT
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SEC
Wrap
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2009-10-10
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23 lines
╘┼╥═╔╬┴╠ ╧╬┼ - 1200 BITS/SEC FIX.
╘O GET RELIABLE COMMUNICATION AT 1200 BITS PER SECOND, ╘┼╥═╔╬┴╠ ╧╬┼ USES THE
METHOD DEVELOPED BY ╙TEVE ╨UNTER. ╘HIS MODIFIES THE TIMING OF EVENTS WHILE
SENDING TO, AND RECEIVING CHARACTERS FROM, THE MODEM. ╒NFORTUNATELY, NOT
ALL ├OMMODORE 64 MACHINES ARE EXACTLY THE SAME. ╘HE DEGREE OF 'FUDGING' MAY
NEED TO BE CHANGED TO SUIT ┘╧╒╥ 64.
╔F YOU SEE A LOT ERRORS WHILE ONLINE AT 1200BPS, THEN YOU MAY GET RELIEF BY
USING ╨╧╦┼ 4688,X AFTER ╠╧┴─ING ╘┼╥═╔╬┴╠ ╧╬┼, AND BEFORE ╥╒╬NING IT.
╘HE IDEAL VALUE OF 'X' WILL ALMOST CERTAINLY LIE IN THE RANGE 50 TO 110.
─IFFERENCES IN 'X' VALUES LESS THAN 3 ARE MOST UNLIKELY TO BE NOTICEABLE.
MORE.. ╘┼╥═╔╬┴╠ ╧╬┼ - 1200 BPS.
╫HEN YOU FIND AN IDEAL 'X' VALUE, YOU CAN ╠╧┴─ THE PROGRAM, ╨╧╦┼ 4688,X AND
╙┴╓┼ THE POKED PROGRAM WITH THE IDEAL VALUE BUILT IN.
╬OTE: THE FUDGE VALUE 'X' IS STORED IN ANY 'OPTION FILES' YOU MAY CREATE
(VIA THE F8 KEY FROM THE 'SET DISPLAY & TRANSMIT OPTIONS' MENU). ╚ENCE, IF
YOU LOAD AN 'OPTION FILE' (USING F7 FROM THE 'SET DISPLAY & TRANSMIT
OPTIONS' MENU) THEN THE VALUE FROM THE LOADED OPTION FILE REPLACES THE VALUE
ORIGINALLY IN THE PROGRAM.
┴ MORE ELEGANT WAY TO SET THE FUDGE FACTOR IS PLANNED FOR A FUTURE RELEASE.
╘╚┼ ┼╬─.