??? 02/26/04 15:15 Read: times |
#65535 - RE: ascii arrow Responding to: ???'s previous message |
I forgot to add that the standard ASCII code set does not actually provide for a set of arrow codes.
There are some defactor standards that have come into standard usage. For example a commom set of keys used by older 24x80 Glass TTYs (RS232 terminals) to move the cursor around were Ctrl-H, Ctrl-J, Ctrl-K, and Ctrl-L. Other software usage that came into play was the old 8-bit CP/M days where MicroStar International used the now famous cursor diamond of Ctl-A, Ctl-S, Ctl-W, and Ctl-X to move the cursor around. From a display standpoint the font set of the popular HD44780 LCD display controller often has a set of arrow symbols encoded into its font table. Look in the data sheet here... http://www.eece.ksu.edu/~lenhert/631/HD44780.pdf ... but of course the presence of the arrow symbols varies according to the version of the part and the code set table it contains. From a PC standpoint the IBM people from early on placed arrow symbols into the CGA/EGA/VGA font sets at certain character positions. You can find these documented in various places including Peter Nortons popular book "Inside the PC". Michael Karas |
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ascii arrow | 01/01/70 00:00 | |
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Not ASCII![]() | 01/01/70 00:00 |