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The timing is often done using simple software counting-loops and assumes an old-style PC/XT clock-rate/cycle-time.Ī software delay-loop which works just fine on an original PC with a 4.77MHz or even an 8MHz! clock-rate XT becomes hopelessly inadequate when run on a modern PC/laptop with a clock-rate closer to 3GHz.Īll good advice generally - the PC to be used for this is contemporary with the software which, depending on the version (I have several) is from between around 1994-1997. Hence the programing software has timers in it so you can send each quartet/octet of data to the radio with a long delay-time between them and then send a 'save' command followed by another delay to let it be saved, before sending the next quartet/octet. One caveat is that the programing software for these sorts of old radios frequently makes spectacular assumptions about the clock-rate of the PC on which it's running.Ī lot of the first-generation flash-memories/EAROMs used to store the programing info in these radios have rather baroque timing considerations when they're being programed - by modern standards they are spectacularly-slow.
TAIT T2020 SOFTWARE SERIAL
What I need to know is whether the serial programming cable between the PC and the radio requires an RS232-TTL level-shifter (ie, MAX232 IC or similar) or whether the level shifting is handled within the radio, allowing direct connection of RS232 to the programming port.Īlso, I'm aware that the similar Tait 2020 supports up to 100 channels which would obviously make it more flexible for amateur usage: Is it possible to 'make' a 2015 into a 2020 just by changing the onboard firmware? The programming software (Some DOS, some early Windows) seems broadly available, although I'm not sure which exact variant applies to this radio which I think is an 'original' 2000 series rather than a 2000/II. Quite a neat little thing, I've never seen one before. It's already on two metres, but programmed with only eight channels to the previous owner's specific requirements. I've been asked to look into reprogramming a VHF high band Tait 2000 series PMR radio, specifically a Tait 2015 which I believe is an 'ordinary' (Not trunked) variant which supports up to 24 channels.
TAIT T2020 SOFTWARE MODS
Amateur Radio, but possibly not vintage enough (mid nineties?) - if so, mods please move to an appropriate home.