Re: 3390/3990-06 I/O Error reported
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The CCW in question:?18000000 00004100 00000000
Thats not a valid format-0 CCW either.
The address if it were a format-0 CCW is absolute location zero.
Either way its not a valid TIC CCW.
Joe
On Sat, Jan 7, 2023 at 4:29 PM < petmo@...> wrote: People ? If you look at the POP, the chapter on ¡®basic I/O ?functions¡¯, there is a chart (in my POP, fig 15-5) that shows the bit assignment for CCW command codes.? The particular code in question is X¡¯18.¡¯ If this is a fmt 0 CCW, that is supposed to be interpreted as a TIC (which is valid) and in the case of a fmt 1 CCW, it is invalid. The message does not indicate the CCW format being used (it should) but, if it is a fmt 1 CCW, the message is correct. IBM (and anybody else) cannot add arbitrary CCW command codes here ¨C the figure indicates where they are allowed. So, this is not a ¡®new¡¯ command code that Hercules cannot understand, it is an error!?? ? Peter Morrison
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