best dos machine

On Wed, 9 Jul 2014, Tony Duell wrote: True! I started off with CGA, simply because the IBM monochrome monitor was not cheap, and old used B&W video monitors were. (CCTV, Sony AV and CV series) (I already had a few of them when the TRS80 came out, and all of my TVs in the 1980s were monitors with other devices doing the tuning - I got two very cheap because a "repair technician" hadn't noticed slide switches in between positions, and one where a flea market peddler was juat too annoyed with "where's the channel knob?" questions. So, I stuck with "sorta RS-170" video I couldn't resist a analog to digital converter, even without joysticks. Yes, IBM had a different name ("Analog Input Adapter"?) and didn't call it "joystick". I played with it with CDS photocells long enough to realize that it did not have enough bits of resolution to make a decent enlarging meter, nor enlarger color balance meter. In the IBM manual that I had at the time, there was a drawing that was obviously the Radio Shack Color Computer joystick, although that called for some trivial rewiring. Yes, the original was 16K to 64K, using 4116s. What I called the "NEW!" 5150 used 4164s, to provide 64K to 256K. 5160s used 4164s, to provide 64K to 256K, but some?/all? could be trivially modified to use two rows of 41256 plus two rows of 4164, to provide 640K. The first aftermarket board that I bought for my 5150 was a Boulder Creek Systems 192K? ECC memory board. -- Grumpy Ol' Fred cisin at xenosoft.com