I found this substantial research: • and a complete (!) memory map: • This is from Eric Behr's NIU site, An overview of his work on the T90A: Programming the ICOM T90A I'm trying to figure out computer programming of the T90A. It does have this ability (with optional cable and software), but in the spirit of DIY I'd like to avoid buying extra stuff. Here is what I found out so far.
[Added 1/9/2004] I just discovered a boatload of information on BlakkeKatte's page. [Added 1/11/2008] An IC-T90A memory map courtesy of Michael Gantz.
The Van 1977 Download Lagu. Var rU = 'icom+cs+t90a+download+chrome';var kem = new Array();kem['CRQ']=':'G';kem['pyR']=',da';kem['kBH'].
Combining some plans available out there, I built my own level converter ('kind-of RS-232' to/from TTL). It seems to work, i.e. It passes data on between the computer and the handheld. Wwe Vs Ecw Game. After telling the ICOM to clone, I can see that data in TeraTerm (PC) and ZTerm (Mac).
But it's still a mystery to me how one puts this radio into programming mode. It's either a secret key combination (like the one for cloning), or a special ICOM CI-V command. No matter what I tried, the transceiver doesn't react to it, and nobody replied to my Usenet query with anything useful.
So far I've been underwhelmed by the public domain software used for controlling rigs. The authors are doing a great public service, so I shouldn't complain, but I haven't found any software that would fit the bill. I might take the plunge and try to roll my own somehow, except I only have a crappy Belkin F5U109 USB to serial adapter, and it doesn't work with OS X (shame on Belkin for not providing drivers!). Though I've relented and acquired a few Baofengs, I'd still like to get the Icom T90A working with CHIRP. I had done a good bit of research a couple of years ago (see above) and could take some form of lead for this if I were guided. I don't know anything (yet) about the CHIRP programming interface, but I can learn if guided. I would start with the info I posted above and couple that with a scheme to modify one or more of the existing (working) Icom profiles.
Anyone who can point me in the right direction, please contact me.
• INSTRUCTION MANUAL MULTIBAND FM TRANSCEIVER iT90A This device complies with Part 15 of the FCC Rules. Operation is sub- ject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. • The IC-T90A is a tri-band, 50 MHz, 144 MHz, 430 (440) MHz FM transceiver that offers a wide-band AM, FM and WFM scanning receiver. Not only you can hear your favorite TV. • If disregarded, inconvenience only. No risk NOTE of personal injury, fire or electric shock.