receiver modification for 19200 baud
transmitter modification for 19200 baud
receiver modification for 38400 baud
transmitter modification for 38400 baud
receiver modification for 76800 baud
transmitter modification for 76800 baud
receiver modification for 153600 baud
transmitter modification for 153600 baud
receiver modification for 307200 baud
transmitter modification for 307200 baud
receiver modification for 614400 baud
modifications of old FSK9600 modem
data, ordering etc. of FSK9601 modem
RX19200 9600 for 19200 baud
RX153600 9600 for 153600 baud
without changeing the xtal osc, max. TX baud rate is 153600 baud!
TXBaud |
9600 |
19200 |
38400 |
76800 |
153600 |
307200* |
307200+ |
614400+ |
|
RX 2400 |
J2 + J6 |
||||||||
RX 4800 |
J3 + J6 |
J2 + J8 |
note (E) |
note (C) |
|||||
RX 9600 |
J4 + J6 |
J3 + J8 |
J2 + J10 |
note (D) |
note (B) |
||||
RX 19200 |
J5 + J6 |
J4 + J8 |
J3 + J10 |
J2 + J12 |
note (A) |
||||
RX 38400 |
J9 + J6 |
J5 + J8 |
J4 + J10 |
J3 + J14 |
J2 + J14 |
J2+J12 |
|||
RX 76800 |
J11 + J6 |
J11 + J8 |
J5 + J10 |
J4 + J12 |
J3 + J14 |
J2 + J14 |
J3+J14 |
J2+J14 |
|
RX 153k |
J13 + J6 |
J13 + J8 |
J13 + J10 |
J5 + J12 |
J4 + J14 |
J3 + J14 |
J4+J12 |
J3+J14 |
|
RX 307k |
J15 + J6 |
J15 + J8 |
J15 + J10 |
J15 + J12 |
J5 + J14 |
J4 + J14 |
J5+J12 |
J4+J14 |
|
RX 614k* |
J15 + J6 |
J15 + J8 |
J15 + J10 |
J15 + J10 |
J5+J14 |
||||
RX 614k+ |
J13 + J6 |
J13 + J8 |
J13 + J10 |
J5 + J12 |
J3 + J14 |
J4+J12 |
|||
RX 1228k+ |
J15 + J6 |
J15 + J8 |
J15 + J10 |
J5+J14 |
J15+J12 |
*: Xtal oscillator 19,6608 MHz / +: Xtal oscillator 39,3216 MHz instead of 9,8304 MHz
(A): J14 closed, J7 pad oriented to board center connected to U3 (ROM) Pin 12 (TX153k/RX19k2)
(B): J14 closed, J7 pad oriented to board center connected to U3 (ROM) Pin 7 (TX153k/RX9k6)
(C): J14 closed, J7 pad oriented to board center connected to U3 (ROM) Pin 8 (TX153k/RX4k8)
(D): J12 closed, J7 pad oriented to board center connected to U3 (ROM) Pin 12 (TX76k/RX9k6)
(E): J12 closed, J7 pad oriented to board center connected to U3 (ROM) Pin 7 (TX76k/RX4k8)