[Icom] IC-745 Question?

Fri, 11 Apr 2003 08:45:18 -0400

Jack,

The answer is officially no, but with a qualifier. The Logic Unit in the 745 
is very similar to that used on the IC-751A, but there are some missing 
parts, PCB headers, plus the uP is hardwired high on the INT2 line. I 
suspect that 751A-style UX-14 type control is possible if the Logic Unit is 
reworked so that the INT2 line is controlled by the UX-14 and the data paths 
(bi-directionally) are established. The one possible hangup in such a scheme 
is how data segments are dynamically assigned to the RAM Unit, there may be 
some differences between the factory 751A scheme and a 745 modified setup. 
Just too early to tell at this point.

I announced some time ago on my www.icomclassic.com website that I was 
looking into the possibility of such a mod. I have an extra 745 on the bench 
dedicated to this effort. Hopefully this summer I will have time to re-visit 
this issue, and see if control can be established in the 745 using a UX-14 
clone type interface. If I get any new info on this I will certainly post 
it.

73, Frank W3UHF
www.icomclassic.com

>From: "Jack Smith" <[email protected]>
>Reply-To: [email protected]
>To: <[email protected]>
>Subject: [Icom] IC-745 Question?
>Date: Thu, 10 Apr 2003 20:24:31 -0600
>
>  Can anyone tell me if there is a computer interface option for the 745.
>And if so is it still made.
>Thanks,
>Jack
>
>----
>Your Moderator: Dick Flanagan W6OLD, [email protected]
>Icom Users Net: Sundays, 1700Z, 14.315 MHz
>Icom FAQ: http://www.qsl.net/icom/

Jack,

The answer is officially no, but with a qualifier. The Logic unit is very 
similar to that used on the IC-751A, but there are some missing parts, PCB 
headers, plus the uP is hardwired high on the INT2 line. I suspect that 
UX-14 type control is possible if the Logic Unit is reworked so that the 
INT2 line is controlled by the UX-14 and the data paths (bi-directionally) 
are established. The one possible hangup in such a scheme is how data 
segments are dynamically assigned to the RAM Unit, there may be some 
differences between the factory 751A scheme and a 745 modified setup. Just 
too early to tell at this point.

I announced some time ago on my www.icomclassic.com website that I was 
looking into the possibility of such a mod. I have an extra 745 on the bench 
dedicated to this effort. Hopefully this summer I will have time to re-visit 
this issue, and see if control can be established in the 745 using a UX-14 
clone type interface. If I get any new info on this I will certainly post 
it.

73, Frank W3UHF
www.icomclassic.com

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