IBM 5280 Distributed Data System - Index of

Read Elapsed Time CounterSource: RTIMER (BRa)I I I 1 1 0 1 I0 8i15J23 31Object: C7 03 @( 00I0 EJo Keyboard operation number: The number that the main microprocessorstores in the keyboard/display lOB starting at hex displacement 1 F.EJ To address: The address of the binary register that contains the main storage,address where the timer value is to be stored.This instruction stores the timer value into a 3-byte storage area. The high-order 2bytes are taken from a 2-byte counter in the system control block (see ElapsedTime Counter in Chapter 1). These 2 bytes of the count indicate the number of1.6 seconds that have elapsed since power on. The low-order byte is taken from akeyboard/display timer. Bits 0-3 of the low-order byte are always zero. Bits 4-7indicate the number of tenths of a second since the last count indicated in thehigh-order 2 bytes.Cancel Current Enter Command (CNENTR)Source:Object:oo Keyboard operation number: The number that the main microprocessorstores in the keyboard/display lOB starting at hex displacement 1 F.This instruction cancels the current ENTR command. The end of screen formatcontrol string functions are performed, and data is no longer accepted from thekeyboard. On the status line, the counters, insert mode symbol, keyboard shift,and hex display position are set to blanks. In the lOB, the command op code isset to zeros.If this operation is issued in an external status subroutine during the processingof a nonoverlapped ENTR command, the return issued in the subroutine is madeto the interrupted ENTR if the interrupted ENTR was not made complete by theexternal status condition. The ENTR is reissued and processing begins at thestart of the screen format control string.274