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

Bit0 Error/Exception Status Bit—An error or exception condition may haveoccurred during the execution of the command or printer device checkmay exist.1 End of Forms Switch—This bit is on when the switch transfers. Bit 0is not set and printing continues for another 39 lines (approximately)before ready is dropped.2 Command Reject is set on under the following conditions:a. An input forms parameter command was issued and a 6 bit codederror status was set.b. A 1000,1101, or 1111 command was issued.c. A belt speed check occurred during a print command.d. A print command was issued that would have caused the printer toprint past the carriage overflow line.e. A print command was issued to a not ready printer.f. Over temperature detected when turning on the print belt motor.g. Belt image checksum error detected when bringing print belt up tospeed.h. Forms error occurred during print command.i. Program check or invalid storage address when cycle stealing datafor a print or diagnostic command.j. A diagnostic command issued with an invalid count or controlleraddress.3 Not Ready is set on under the following conditions:a. ENABLE/DISABLE switch in DISABLE positionb. Cover openc. Throat opend. End of formse. Forms jamf. Hammer checkg. Over temperature4 Form Overflow—The number of lines printed on the form equals orexceeds the number presented in output forms parameters instruction.This indication will only occur once per form. This bit will never set ifyou do not define forms length and overflow value after power on reset.5 Invalid Belt Image—A check sum error was detected on the belt image.6 Incorrect Record Length—Set when the word count on a print commandexceeds 66 words.7 Belt Speed Check—The belt did not come up to speed after having beenon for two seconds.8 Storage Data Check—A storage location accessed by an attachment duringthe current instruction contained bad parity.9 Program Check—The main storage address presented by the attachmentduring the current cycle steal operation exceeds the storage sizeinstalled in the system.10 Hardware Check Sum Error—An error has been found on the attachmentcard.11 Invalid Command—A command other than those listed under initiateI/O was issued to the printer attachment.12 2502 Attached.13 Device End—Device End will be on at the end of an interrupt-producingcommand.14 Printer Attached.15 Status Word 2 Indicator—Indicates printer device information ispresent in Status Word 2 and should be interrogated.IBM 5024 I/0 Attachment Enclosure 17-25