projects / pdp8.git / blame
| Commit | Line | Data |
|---|---|---|
| 81e70d48 PH |
1 | / \ eD A T E S U B R O U T I N E\r |
| 2 | /\r | |
| 3 | / FORTRAN (F4) LIBRARY\r | |
| 4 | / ORIGINAL RELEASE 22-MAY-74\r | |
| 5 | /\r | |
| 6 | / UPDATES\r | |
| 7 | / 1. NOW WE ADD 78 (0116) TO THE YEAR INSTEAD OF 1970 (03662)\r | |
| 8 | / 24-APR-81 H.A.\r | |
| 9 | /\r | |
| 10 | SECT DATE\r | |
| 11 | JA #ST\r | |
| 12 | EXTERN #DATE\r | |
| 13 | #XR, ORG .+10\r | |
| 14 | TEXT +DATE +\r | |
| 15 | #RET,\r | |
| 16 | #BASE, ORG .+3\r | |
| 17 | MONTH, ORG .+3\r | |
| 18 | DAY, ORG .+3\r | |
| 19 | YEAR, ORG .+3\r | |
| 20 | TEMP, ORG .+3\r | |
| 21 | DATADR, 0\r | |
| 22 | JA #DATE-1 /ADDRESS OF PS8 DATE WORD\r | |
| 23 | ORG 10*3+#BASE\r | |
| 24 | FNOP\r | |
| 25 | JA #RET\r | |
| 26 | 0\r | |
| 27 | DRTN, JA .\r | |
| 28 | BASE 0\r | |
| 29 | #ST, STARTD\r | |
| 30 | 0210\r | |
| 31 | FSTA DRTN\r | |
| 32 | 0200\r | |
| 33 | BASE #BASE\r | |
| 34 | SETX #XR\r | |
| 35 | SETB #BASE\r | |
| 36 | LDX 0,1\r | |
| 37 | FSTA #BASE\r | |
| 38 | FLDA% #BASE,1+\r | |
| 39 | FSTA MONTH\r | |
| 40 | FLDA% #BASE,1+\r | |
| 41 | FSTA DAY\r | |
| 42 | FLDA% #BASE,1+\r | |
| 43 | FSTA YEAR\r | |
| 44 | FLDA% DATADR /GET THE PS-8 DATE WORD\r | |
| 45 | FSTA TEMP /SAVE IT\r | |
| 46 | FCLA\r | |
| 47 | FSTA TEMP,0 /ZERO EXPONENT AND HIGH HALF OF MANTISSA\r | |
| 48 | LDX 10,1 /SHIFT COUNT\r | |
| 49 | FLDA TEMP /GET IT BACK\r | |
| 50 | ALN 1 /ISOLATE THE MONTH\r | |
| 51 | ATX 1 /SAVE THE MONTH\r | |
| 52 | LDX -4,2 /DAY SHIFT COUNT\r | |
| 53 | FLDA TEMP /GET BACK THE DATE\r | |
| 54 | ALN 2 /SHIFT MONTH BITS INTO\r | |
| 55 | /HIGH HALF OF MANTISSA\r | |
| 56 | FSTA TEMP /SAVE THIS\r | |
| 57 | FCLA\r | |
| 58 | FSTA TEMP,0 /ISOLATING DAY/YEAR BITS\r | |
| 59 | FLDA TEMP /GET THEM BACK\r | |
| 60 | LDX 7,2 /NOW ISOLATE DAY\r | |
| 61 | ALN 2\r | |
| 62 | ATX 2 /AND SAVE IT IN 2\r | |
| 63 | FLDA TEMP /GET DAY/YEAR BITS\r | |
| 64 | LDX -5,3 /PREPARE TO REMOVE DAY BITS\r | |
| 65 | ALN 3 /BY SHIFTING THEM INTO HIGH HALF OF MANTISSA\r | |
| 66 | FSTA TEMP /SAVE THEM\r | |
| 67 | FCLA\r | |
| 68 | FSTA TEMP,0 /ZERO DAY BITS\r | |
| 69 | FLDA TEMP /RESTORE YEAR BITS\r | |
| 70 | LDX 11,3 /SHIFT BACK\r | |
| 71 | ALN 3\r | |
| 72 | ATX 3 /PUT THEM INTO XR 3\r | |
| 73 | STARTF /RE-ENTER F MODE\r | |
| 74 | XTA 1 /GET MONTH\r | |
| 75 | FSTA% MONTH /RETURN IN ARG\r | |
| 76 | XTA 2 /NOW DAY\r | |
| 77 | FSTA% DAY\r | |
| 78 | ADDX 116,3 /MAKE IT + 78\r | |
| 79 | XTA 3 /NOW YEAR\r | |
| 80 | FSTA% YEAR\r | |
| 81 | JA DRTN /RETURN\r | |
| 82 | END\r | |
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