Knowledge is power - modification of the C-DOS modem.

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║ 5 ║ KNOWLEDGE IS POWER!!!                       ║
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If you decide to purchase a modem and join the ranks of ZX Net, then you
The text below, kindly provided to us, will help
                            ARS.

(c) ARS MDM 249-97-53

Since Nikiforov gave C-DOS 1.23 freeware status, you can
You can easily move the modem to a new port by changing the byte
(#5D40) and changing the connection of 10 and 11 conductors accordingly
from the modem board. Just in case, let me remind you how to check the freedom
new port: write in Basic:

10 INPUT "Port:";P
20 FOR I=0 TO 255
30 OUT P,I:PRINT AT 0,0;I;" ";IN P;
40 IF IN P<>255 THEN PRINT "ERROR":STOP
50 NEXT I

A free port should always read 255 and no side effects
effects. And check it out in 48 and 128 modes!

Standard port Baltika - 239 = #EF = %11101111
(10 pins of the board connected to A4 (34 Z80), the jumper is closed)

In case of problems, try the ports:
243 = #F3 = %11110011 (10 pins->A2(32 Z80), 11 pins->A3(33 Z80))
119 = #77 = %01110111 (10 pins->A7(37 Z80), 11 pins->A3(33 Z80))
Of course, if addressing is 2 bits, a jumper on the board
The modem needs to be removed.

You can try the following modificationmodem: unsolder
(or better yet, make it switchable) 1 Mohm cutter on the board. He's standing
near the telephone jack and 2 blue connectors - in the middle (mar-
marking: brown, black, green)
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