Difference between revisions of "TI-99/4"

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(add a couple of differences to 99/4a)
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The TI-99/4 was the predecessor of the TI-99/4A home computer.
#Redirect[[TI99/4 and 4a differences]]
 
[[Image:ti994_console.jpg|300px]]
 
Differences between 99/4 and 99/4A:
 
Apart from the obviously different keyboard there are other not obvious changes.
 
==Call Key==
The keyboard change means that for programs to run on BOTH consoles, when using the split keyboard (CALL KEY 1 and 2) you cannot use keys which return the codes 13, 16, and 17. When using a split keyboard on the "A" the key value 0 (zero) does NOT equate to zero - you must use indirect means such as IF A+ 1 = 1.
 
==Character Set==
Now - non obvious: The 99/ 4A has a different character set - not only are small characters made available (with some clever internal routines) but the big letters are BIGGER by one pixel. The result: A fairly crowded screen AND - if you are fortunate and have a thermal printer - printer TP. U. S. E. (screen dump) does NOT work. (It works, but badly, with no space between letters, vertically).
 


[[Category:Hardware]]
[[Category:Hardware]]

Latest revision as of 15:26, 28 December 2014