BOOB MAXXX ASSEMBLER, VER 2.x XXXXXXXX 81MUD 8 MXXXXXX, VERSION 3.0, 14 APRIL 1975 ERRORS · Q PAGE 3                               P     4 0                               DATA IN TIC                              f                              :     5 0                               DATA OUT TIC                              ;                                       1x02 PROM PROG. GQ/NO GO                                    6 0 PBIT                              :                                       liQ2A PROM XXXX. GO/NQ GO                                    7 0 PBITA                              J                              X 1/0 DEVICE INPUT STATUS PORT 1 (TTS) Bjr VALUES                              J                              0                                    BIT REST MNEMONIC DESCRXXXXXX                              P                              J                              J     0 I TTYDA                         IX TTYDA · D, INXXX IS READY                              ;     I I                               OVERRUN ERPOR                              ;     2 0 TTYBE                         IE" TTYBE · 0, OUTPUT IS READY                              ;     3 I                               FRAMING ERROR                              J     4 I                               PARITY ERROR                              J     S 0 PTRDA                         IF PTRDA · I, PTR HAS CHAR                              J     6 I PROV                          IF PROV · I, PTP IS READY                                    7                                 UNASSIGNED                              7                              ;                              ; I/O DEVICE INPUT SXXXXX PORT 5 (CRTS) BIT VALUES                              ;                              }     BJT REST MNEMONIC DESCRIPTION                              J                              g     0 1 CRTDA                         IF CRTDA · 0, INPUT IS READY                              P                              J     I 1                               OVERRUN ERROR                              J     2 0 CRTBE                         IF CXXXX · U, UUTXXX IS READY                              J     3 I                               FRAMING LRROR                              J     4 I                               PARITY ERROR                              ;     5                                 UXXXXXXXXX                              J     6                                 UNAXXXXXXX                              J     x                                 UNASSGIGNED                              g                              *                              ; J/O COMMAND CXXXXXXXX                              :             0001             RBIT  EQU I             0002             PCXX  EQU 2             0004             RCMD  EQU 4             0008             DSB   EXX x             x080             PBJTA EQU BOX                              J                              :                              : TTY 1/0 CONSTANTX                              J             0000             TTx   EXX 0                    J TTY INPUT DATA PORT             0008             TTO   EQU BIAS+0               J TTY OUTPUT DATA PORT             0001             TTS   EQU I                    J TTY INPUT STANS PORT             0009             TTC   EQU BIAS+1               J TTY OUTPUT CQMKXXX PORT             0009             TTYGQ EQU RBIT OR DSB          ; START TTI READER             0008             TTYXX EQU DSB                  7 STOP TTY READ£R             0001             TTYDA EQU I                    7 DATA AVAILABLE             0004             TTYBE EQU 4                    7 TRANSMIT BUFFER EMPTY                              J