Systems Reference Library - All about the IBM 1130 Computing ...

Read1054/1055 DSW Interrupt Indicators0 15 0 4 15Core Storage Address ... 0001 . 1 10 , 1 01/557411 1This command causes the character in the paper tapebuffer to be read into bit positions 0 through 7 of thecore storage location specified by the IOCC addressword. Bit positions 8 through 15 of the core storagelocation are set to 0.Prior to issuing an XIO read, an XIO controlshould be executed to load a character into the buffer.Control15 0 4 8 15o 001 111 o o1111 11Two interrupt indicators are associated with the 1054/1055. These two interrupts are internally wiredtogether and assigned to the same priority interruptlevel. Figure 66 shows the 1054/1055 DSW formatand defines interrupt and program resettable indicators.READER SERVICE RESPONSE: This indicator turnson, causing an interrupt, when the 1054 completesexecution of an XIO control. This interrupt indicatesthat a character is available in the paper tape bufferand can be read into core storage.PUNCH SERVICE RESPONSE: This indicator turnson, causing an interrupt, when the 1055 finishespunching a character sent by an XIO write. Thisinterrupt indicates that the 1055 can accept anothercommand.115576C1054/1055 DSW Noninterrupt IndicatorsThis command causes one paper tape character toenter the paper tape buffer, the tape to advance onecharacter position, and a reader service interrupt tobe initiated. This interrupt signals that a characteris ready in the buffer, to be read into core storage bya subsequent X10 read.This command is valid only if modifier bit 11(start paper tape reader) is on.Sense DeviceFigure 66 shows the 1054/1055 DSW format and definesnoninterrupt and program resettable indicators.0 2 3 4 5 6 7 8 9 10 1 12 13 14 1511111 j 1_11 11Indicator Name13 CE Punch Not Ready12 CE Punch Busy0 Is 0 4 8 150 0 01 1 11 1 10 = No indicator reset1 = Indicator reset115577C 1This command causes the 1054/1055 device statusword (DSW) to be loaded into the accumulator (A).The DSW is shown in Figure 66.Modifier bit 15 controls reset of the programresettable indicators. If modifier bit 15 is on, theindicators are reset. If modifier bit 15 is off, theindicators are not reset. Because the DSW is sharedby the 1054 and 1055, care must be used in resettingindicators. Otherwise, indicators for one device maybe lost when both devices are operating simultaneously.11 CE Reader Not Ready10 CE Reader Busy9 Reader Storage Protect #8 Reader Parity Error #7 Punch Not Ready6 Punch Busy5 Reader Not Ready4 Reader Busy* Interrupt# Indicator reset by an XIO sense device with reset(Other indicators are reset by their status turnoff)Figure 66. 1054/1055 Device Status Word3 Punch Service Response *ft2 Punch Parity Error #1 Reader Service Response *ft0 Reader Any Error #115578CIBM 1054 Paper Tape Reader and IBM 1055 Paper Tape Punch 143