From: Chuck Guzis <cclist at sydex.com>
>I've long thought that the strangling of the bus done on the TI 99/4
>home PC was quite possibly motivated by TI's not wanting to compete with
>its own 990 series of computers. The cost of a TI 990/4 was
>considerably higher than a 99/4, even though both use the same MPU.
I have heard & read this enough times to think there's something to it.
Wouldn't be the first time this sort of thing has been done.
>I find the I2L versions of the 9900 far more interesting as far as chips
>go. They were used quite often in military gear, not as devices offered
>to the general unwashed. In a similar way, one did not see the
>Fairchild 9940 in much general audience gear.
Yes. You can debate how good a general purpose processor the 9900 is, but
it was proven to be a very good embedded controller. The memory mapped
registers and workspace swapping made real time context switching a breeze
compared to more conventional designs.
From: John Many Jars <john at yoyodyne-propulsion.net>
>Basically, my dad bought the wrong thing. It cost about 1/2 what an
>Apple //+ would have cost, and was about 1/8 as useful.
Ha! That is *exactly* how I ended up with my own 99/4.
Many of us know about the classic prank Signetic played back in the
1970s, with the WOM (write only memory) - but today I found out that
the chips actually exist. The son of an acquaintance uploaded some
pictures (on a different list) of the original sales kit Signetics
mailed out, and included is an actual IC, I think a 24 pin DIP, marked
S7324 2512D NFG.
Interesting other stuff, too - including a fortune cookie (I think),
bumper sticker, and funny nose & glasses.
----- Original Message -----
Date: Sun, 23 Feb 2014 14:05:46 +1300
From: Terry Stewart <terry at webweavers.co.nz>
Subject: Re: TI-99/4A acquisition
> ...I definitely need some more carts though.
...and a wider desk...
Any suggestions on repairing a dead spacebar key? All the online
discussion I find pertains to an earlier model with individual keyswitches
soldered into a PCB backplane. This keyboard is held together with melted
over plastic posts and is obviously using a printed membrane.
Before I launch in blindly I'd love to hear from anyone who's been through
March 1 is the deadline to register VCF East exhibits.
Anyone attempting to register after that will have to grovel to me and explain why "But I was busy!" applies to them and not to the 32 other people who found time...
Full details about the show, agenda, schedule, etc. are at http://www.vintage.org/2014/east and you'll also find updates at http://www.facebook.com/vcfeast.
Remember -- this is the first THREE-DAY show and anyone who goes Friday can win an oscilloscope.