I believe ya, but am hoping for a cite.

-----Original Message-----
From: IBM Mainframe Discussion List <[email protected]> On Behalf Of 
Seymour J Metz
Sent: Friday, May 31, 2024 1:33 PM
To: [email protected]
Subject: Re: Upgrade by cutting a wire?

That sort of thing was done in the 1950s.

--
Shmuel (Seymour J.) Metz
http://mason.gmu.edu/~smetz3
עַם יִשְׂרָאֵל חַי
נֵ֣צַח יִשְׂרָאֵ֔ל לֹ֥א יְשַׁקֵּ֖ר

________________________________________
From: IBM Mainframe Discussion List <[email protected]> on behalf of 
Rick Troth <[email protected]>
Sent: Friday, May 31, 2024 10:49 AM
To: [email protected]
Subject: Re: Upgrade by cutting a wire?

This kind of thing is so common. Maybe it was majic in the 1980s. But now, 
everything is digital and pre-programmed at the factory.

I have a shiny new Icom IC-7300 transceiver. (That's ham radio talk.) It has a 
general coverage receiver, all modes from like 0 to somewhere past 54MHz. But 
it will only *transmit* on frequencies legal to US radio amateurs ... at the 
time of manufacture.
I'VE BEEN TOLD that there is a diode I can clip or remove that will negate the 
transmit lockout.

Legally, I'm not supposed to transmit on (e.g.) 870KHz broadcast AM, and I'm 
not interested in setting up a pirate station. But hams are into disaster 
preparedness. In a crisis, I might *need* to transmit on radio frequencies that 
I'm not normally authorized for. (Not to mention that I hate the whole nanny 
thing.) So ... yeah ... I might "upgrade by cutting a wire" soonish.

Not mainframe, but kinda related. And your fault for making me think of it. 
*:-)*


-- R; <><


On 5/31/24 9:49 AM, Phil Smith III wrote:
> I remember hearing that some Amdahl 370 clone was upgradable by cutting a 
> wire. Anyone else ever hear this? Can't find a cite on the web.
>
> Just curiosity, no real point to this...! (But it is Friday.)
>
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