Re: Viewing 5250 attribute bytes

In order to figure out what bytes do what, I have gone to some display programming manual, I think - or I use a DSPF with all the possibilities in it

You get to deal with colors and high intensity and reverse image and underline and all that - even
non-display - I don't think column separators have
attribute bytes - that's a setting for the whole display, it seems.

QuestView includes a reference chart that shows a full strike of the current EBCDIC codepage, and a complete list of the standard attribute bytes, and what they do.

The column separator bit in the attribute byte is the difference between green and cyan, and between white and yellow, and between steady red (dim blink in monochrome) and pink, and between flashing red (bright blink in monochrome) and blue.

Or in more detail, the attribute bytes are characters 20 through 3F (hex), with the ones bit indicating reverse image, the twos bit indicating highlight, the fours bit indicating underline, the eights bit indicating blink, and the sixteens bit indicating column separators. Nondisplay is a low-order nybble of 1111, with or without the column separator bit. On color terminals, white is the highlight bit, red is the blink bit, red blink is the highlight and blink bits, cyan is the CS bit, yellow is the CS and HI bits, pink is the CS and BL bits, and blue is the CS, HI, and BL bits. Note that because of the 1111=nondisplay convention, it is not possible to have reverse-image underline in white, red blink, yellow, or blue, or (on monochrome terminals) in highlight or blink-highlight, with or without column seps.

Any color terminal from the 3487 on includes the option of turning off column separators, as does any reasonably aesthetically pleasing emulator.

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JHHL