IBM System/7 Functional Characteristics - All about the IBM 1130 ...

Write IAR Backup (WIB) (5010 Processor Module Model E only)0 15Op code R Level Mod1 1 1 1 1 XXX 0 0 XX 1 1 1 01 1 1 1 1I 1 1 1 III`■•■••■•••\,•■■,••■•••■,,•■■••• "••••••••■,,••••■• "••••■••■,•••■•••,'F 8-F 0-3The contents of the register on the current level specified by the R field, or theaccumulator if R = 000, replace the contents of the instruction address register backupon the selected level. The level is selected by the binary encoded value in bits 8 through11 of the instruction. The contents of the register specified by the R field are not changed.Since level 0 has no instruction address register backup, no-operation is performed if level0 is selected. The carry, overflow, and result indicators are not changed.Example:0 15WIB instructionOp code R Level Mod1 1 1 1 1 1 1 0 0 0 0 1 1 1 1 0I I I I 1 1 III III.-..•••■•Ne•■■•■••F E 1WIB instructionis fetchedIndex register 60 15(Decimal 88)0 0 0 010 0 0 010 1 0 111 0 0 01 1 1 I 1 1 1 1 1 1 1 1 1 1 1••■•••••••,••■•••'0 0 5 8IAR backup registerLevel 10 151 1 1 1 1 1 1 1 I 1 1 1 1 1 IX0 150 15After WI Binstructionexecution 0 0 0(Decimal 88)0 1 0 0 0 010 1 0 111 0 0 01 1 1 1 1 1 1 1 1 1 1 1 1 1 I0 0 5 8(Decimal 88)0 0 0 0 1 0 0 0 010 1 0 111 0 0 01 I 1 1 1 1 1 I 1 1 1 1 I 1 1•••••••••%e.•••••■' ,••■•••••■,•••••■••'0 0 5 84-46 GA34-0003