RS-232PT2+
FILE INFORMATION
FILENAME(S): RS-232PT2+
FILE TYPE(S): SEQ
FILE SIZE: 4.4K
FIRST SEEN: 2025-10-19 22:48:52
APPEARS ON: 1 disk(s)
FILE HASH
5dea765622be315bb9a3aca057b1a9b3f7c44596432893df5365db9f9e1c4cfc
FOUND ON DISKS (1 DISKS)
| DISK TITLE | FILENAME | FILE TYPE | COLLECTION | TRACK | SECTOR | ACTIONS |
|---|---|---|---|---|---|---|
| AO JUNE | RS-232PT2+ | SEQ | Radd Maxx | 5 | 1 | DOWNLOAD FILE |
FILE CONTENT & ANALYSIS
00000000: 0D 20 D4 48 45 20 43 49 52 43 55 49 54 20 49 54 |. .HE CIRCUIT IT| 00000010: 53 45 4C 46 20 49 53 20 46 41 49 52 4C 59 20 53 |SELF IS FAIRLY S| 00000020: 49 4D 50 4C 45 20 28 D2 45 46 45 52 20 54 4F 20 |IMPLE (.EFER TO | 00000030: 46 49 47 55 52 45 20 23 32 29 20 46 4F 52 20 54 |FIGURE #2) FOR T| 00000040: 48 45 20 53 43 48 45 4D 41 54 49 43 20 44 49 41 |HE SCHEMATIC DIA| 00000050: 47 52 41 4D 29 2E 20 D4 48 52 45 45 20 C9 C3 53 |GRAM). .HREE ..S| 00000060: 20 41 4E 44 20 41 20 48 41 4E 44 46 55 4C 4C 20 | AND A HANDFULL | 00000070: 4F 46 20 44 49 53 43 52 45 54 45 20 50 41 52 54 |OF DISCRETE PART| 00000080: 53 20 41 52 45 20 55 53 45 44 2E 20 D4 48 45 20 |S ARE USED. .HE | 00000090: 22 D5 33 22 20 31 34 38 39 20 49 53 20 41 20 51 |".3" 1489 IS A Q| 000000A0: 55 41 44 20 D2 D3 2D 32 33 32 20 54 4F 20 D4 D4 |UAD ..-232 TO ..| 000000B0: CC 20 4C 49 4E 45 20 52 45 43 45 49 56 45 52 2C |. LINE RECEIVER,| 000000C0: 20 54 48 45 20 22 D5 32 22 20 31 34 38 38 20 49 | THE ".2" 1488 I| 000000D0: 53 20 41 20 D4 D4 CC 20 54 4F 20 D2 D3 2D 32 33 |S A ... TO ..-23| 000000E0: 32 20 51 55 41 44 20 4C 49 4E 45 20 44 52 49 56 |2 QUAD LINE DRIV| 000000F0: 45 52 2E 20 D4 48 45 20 22 D5 31 22 20 37 34 30 |ER. .HE ".1" 740| 00000100: 34 20 48 45 58 20 49 4E 56 45 52 54 45 52 20 49 |4 HEX INVERTER I| 00000110: 53 20 4E 45 45 44 45 44 20 54 4F 20 43 4F 52 52 |S NEEDED TO CORR| 00000120: 45 43 54 20 54 48 45 20 42 41 43 4B 57 41 52 44 |ECT THE BACKWARD| 00000130: 53 20 4C 45 56 45 4C 53 20 4F 46 20 54 48 45 20 |S LEVELS OF THE | 00000140: C3 4F 4D 4D 4F 44 4F 52 45 20 48 41 4E 44 53 48 |.OMMODORE HANDSH| 00000150: 41 4B 45 20 4C 49 4E 45 53 2E 0D 20 C1 4C 4C 20 |AKE LINES.. .LL | 00000160: 54 48 45 20 50 4F 57 45 52 20 46 4F 52 20 54 48 |THE POWER FOR TH| 00000170: 45 20 49 4E 54 45 52 46 41 43 45 20 49 53 20 50 |E INTERFACE IS P| 00000180: 52 4F 56 49 44 45 44 20 42 59 20 54 48 45 20 D5 |ROVIDED BY THE .| 00000190: 53 45 52 20 D0 4F 52 54 2E 20 D4 48 52 45 45 20 |SER .ORT. .HREE | 000001A0: 31 30 30 20 55 46 44 2E 2F 33 35 20 56 4F 4C 54 |100 UFD./35 VOLT| 000001B0: 20 45 4C 45 43 54 52 4F 4C 59 54 49 43 20 43 41 | ELECTROLYTIC CA| 000001C0: 50 41 43 49 54 4F 52 53 20 41 4E 44 20 54 48 52 |PACITORS AND THR| 000001D0: 45 45 20 31 CE 31 30 30 34 20 46 4F 52 4D 20 41 |EE 1.1004 FORM A| 000001E0: 20 56 4F 4C 54 41 47 45 20 53 4F 55 52 43 45 20 | VOLTAGE SOURCE | 000001F0: 46 4F 52 20 54 48 45 20 2D 31 32 20 54 4F 20 2B |FOR THE -12 TO +| 00000200: 31 32 20 56 4F 4C 54 41 47 45 53 20 4E 45 45 44 |12 VOLTAGES NEED| 00000210: 45 44 20 46 4F 52 20 54 48 45 20 D2 D3 2D 32 33 |ED FOR THE ..-23| 00000220: 32 20 4C 49 4E 45 53 2E 20 D4 48 45 20 39 20 56 |2 LINES. .HE 9 V| 00000230: 4F 4C 54 20 4C 49 4E 45 53 20 46 52 4F 4D 20 54 |OLT LINES FROM T| 00000240: 48 45 20 D5 53 45 52 20 D0 4F 52 54 20 41 52 45 |HE .SER .ORT ARE| 00000250: 20 52 45 43 54 49 46 49 45 44 20 41 4E 44 20 46 | RECTIFIED AND F| 00000260: 49 4C 54 45 52 45 44 20 46 4F 52 20 54 48 49 53 |ILTERED FOR THIS| 00000270: 2E 20 C1 4E 4F 54 48 45 52 20 43 4C 45 43 54 52 |. .NOTHER CLECTR| 00000280: 4F 4C 59 54 49 43 20 43 41 50 41 43 49 54 4F 52 |OLYTIC CAPACITOR| 00000290: 20 46 49 4C 54 45 52 53 20 54 48 45 20 35 20 56 | FILTERS THE 5 V| 000002A0: 4F 4C 54 20 4C 49 4E 45 20 46 4F 52 20 54 48 45 |OLT LINE FOR THE| 000002B0: 20 C9 C3 53 2E 0D 20 D4 57 4F 20 45 49 47 48 54 | ..S.. .WO EIGHT| 000002C0: 20 50 4F 53 49 54 49 4F 4E 20 C4 C9 D0 20 53 57 | POSITION ... SW| 000002D0: 49 54 43 48 45 53 20 41 52 45 20 55 53 45 44 20 |ITCHES ARE USED | 000002E0: 41 53 20 43 4F 4E 46 49 47 55 52 41 54 49 4F 4E |AS CONFIGURATION| 000002F0: 20 53 57 49 54 43 48 45 53 2E 20 41 4C 4C 20 31 | SWITCHES. ALL 1| 00000300: 36 20 50 4F 53 49 54 49 4F 4E 53 20 41 52 45 20 |6 POSITIONS ARE | 00000310: 55 53 45 44 2E 20 D4 48 45 20 22 42 49 47 20 45 |USED. .HE "BIG E| 00000320: 49 47 48 54 22 20 D2 D3 2D 32 33 32 20 4C 49 4E |IGHT" ..-232 LIN| 00000330: 45 53 20 43 41 4E 20 42 45 20 54 4F 47 47 4C 45 |ES CAN BE TOGGLE| 00000340: 44 20 54 48 52 4F 55 47 48 20 54 48 45 53 45 20 |D THROUGH THESE | 00000350: 53 57 49 54 43 48 45 53 2E 20 D4 48 45 20 53 57 |SWITCHES. .HE SW| 00000360: 49 54 43 48 45 53 20 43 41 4E 20 42 45 20 53 45 |ITCHES CAN BE SE| 00000370: 54 20 54 4F 20 41 4C 4C 4F 57 20 54 48 45 20 D5 |T TO ALLOW THE .| 00000380: 53 45 52 20 D0 4F 52 54 20 54 4F 20 41 43 54 20 |SER .ORT TO ACT | 00000390: 4C 49 4B 45 20 41 20 54 45 52 4D 49 4E 41 4C 20 |LIKE A TERMINAL | 000003A0: 28 C4 D4 C5 29 20 53 4F 20 54 48 41 54 20 49 54 |(...) SO THAT IT| 000003B0: 20 57 49 4C 4C 20 57 4F 52 4B 20 57 49 54 48 20 | WILL WORK WITH | 000003C0: 41 20 4D 4F 44 45 4D 2E 20 C2 59 20 53 49 4D 50 |A MODEM. .Y SIMP| 000003D0: 4C 59 20 52 45 53 45 54 54 49 4E 47 20 54 48 45 |LY RESETTING THE| 000003E0: 20 C4 C9 D0 20 53 57 49 54 43 48 45 53 2C 20 59 | ... SWITCHES, Y| 000003F0: 4F 55 20 43 41 4E 20 52 45 2D 43 4F 4E 46 49 47 |OU CAN RE-CONFIG| 00000400: 55 52 45 20 54 48 45 20 49 4E 54 45 52 46 41 43 |URE THE INTERFAC| 00000410: 45 20 41 53 20 41 20 22 4E 55 4C 4C 20 4D 4F 44 |E AS A "NULL MOD| 00000420: 45 4D 22 20 28 C4 C3 C5 29 20 44 45 56 49 43 45 |EM" (...) DEVICE| 00000430: 20 41 4E 44 20 43 4F 4D 4D 55 4E 49 43 41 54 45 | AND COMMUNICATE| 00000440: 20 57 49 54 48 20 50 52 49 4E 54 45 52 53 20 41 | WITH PRINTERS A| 00000450: 4E 44 20 4F 54 48 45 52 20 43 4F 4D 50 55 54 45 |ND OTHER COMPUTE| 00000460: 52 53 2E 20 C9 4E 20 41 44 44 49 54 49 4F 4E 2C |RS. .N ADDITION,| 00000470: 20 54 48 45 20 C4 C3 C4 20 41 4E 44 20 D2 C9 20 | THE ... AND .. | 00000480: 4C 49 4E 45 53 20 43 41 4E 20 42 45 20 4D 41 44 |LINES CAN BE MAD| 00000490: 45 20 54 4F 20 49 4E 50 55 54 53 20 4F 52 20 48 |E TO INPUTS OR H| 000004A0: 45 4C 44 20 48 49 47 48 2E 20 D4 48 45 20 C4 C9 |ELD HIGH. .HE ..| 000004B0: D0 20 53 57 49 54 43 48 45 53 20 46 4C 45 58 49 |. SWITCHES FLEXI| 000004C0: 42 49 4C 49 54 59 20 4B 45 45 50 53 20 59 4F 55 |BILITY KEEPS YOU| 000004D0: 20 46 52 4F 4D 20 48 41 56 49 4E 47 20 54 4F 20 | FROM HAVING TO | 000004E0: 43 4F 4E 53 54 52 55 43 54 20 44 49 46 46 45 52 |CONSTRUCT DIFFER| 000004F0: 45 4E 54 20 43 41 42 4C 45 53 20 54 48 41 54 20 |ENT CABLES THAT | 00000500: 48 41 56 45 20 22 48 41 52 44 57 49 52 45 44 22 |HAVE "HARDWIRED"| 00000510: 20 43 4F 4E 46 49 47 55 52 41 54 49 4F 4E 53 2E | CONFIGURATIONS.| 00000520: 20 C9 4E 53 54 45 41 44 2C 20 59 4F 55 20 43 41 | .NSTEAD, YOU CA| 00000530: 4E 20 49 4E 53 54 41 4E 54 4C 59 20 53 57 49 54 |N INSTANTLY SWIT| 00000540: 43 48 20 46 52 4F 4D 20 4F 4E 45 20 43 4F 4E 46 |CH FROM ONE CONF| 00000550: 49 47 55 52 41 54 49 4F 4E 20 54 4F 20 41 4E 4F |IGURATION TO ANO| 00000560: 54 48 45 52 2E 0D 20 D3 49 4E 43 45 20 54 48 45 |THER.. .INCE THE| 00000570: 20 C4 C9 D0 20 53 57 49 54 43 48 45 53 20 41 52 | ... SWITCHES AR| 00000580: 45 20 4D 50 4F 55 4E 54 45 44 20 49 4E 20 53 4F |E MPOUNTED IN SO| 00000590: 43 4B 45 54 53 2E 20 D9 4F 55 20 43 41 4E 20 55 |CKETS. .OU CAN U| 000005A0: 53 45 20 54 48 45 20 45 58 54 52 41 20 4C 4F 4E |SE THE EXTRA LON| 000005B0: 47 20 4C 45 4E 47 54 48 20 4F 46 20 54 48 45 20 |G LENGTH OF THE | 000005C0: 57 49 52 45 2D 57 52 41 50 20 4C 45 47 53 20 41 |WIRE-WRAP LEGS A| 000005D0: 53 20 41 4E 20 41 44 44 49 54 49 4F 4E 41 4C 20 |S AN ADDITIONAL | 000005E0: 43 4F 4E 46 49 47 55 52 41 54 49 4F 4E 20 44 45 |CONFIGURATION DE| 000005F0: 56 49 43 45 2E 20 C2 59 20 43 4F 4E 4E 45 43 54 |VICE. .Y CONNECT| 00000600: 49 4E 47 20 54 48 45 20 52 49 47 48 54 20 4C 45 |ING THE RIGHT LE| 00000610: 47 53 20 54 4F 47 45 54 48 45 52 20 57 49 54 48 |GS TOGETHER WITH| 00000620: 20 57 49 52 45 2D 57 52 41 50 20 59 4F 55 20 43 | WIRE-WRAP YOU C| 00000630: 41 4E 20 48 4F 4C 44 20 41 4E 59 20 4C 49 4E 45 |AN HOLD ANY LINE| 00000640: 53 20 50 45 52 4D 41 4E 45 4E 54 4C 59 20 48 49 |S PERMANENTLY HI| 00000650: 47 48 20 4F 52 20 4C 4F 57 2E 20 D9 4F 55 20 43 |GH OR LOW. .OU C| 00000660: 41 4E 41 4C 53 4F 20 48 41 56 45 20 4D 4F 52 45 |ANALSO HAVE MORE| 00000670: 20 54 48 41 4E 20 4F 4E 45 20 4C 49 4E 45 20 44 | THAN ONE LINE D| 00000680: 52 49 56 45 4E 20 4F 46 46 20 54 48 41 20 53 41 |RIVEN OFF THA SA| 00000690: 4D 45 20 49 4E 50 55 54 20 4F 52 20 4F 55 54 50 |ME INPUT OR OUTP| 000006A0: 55 54 2E 20 D4 48 49 53 20 46 4C 45 58 49 42 49 |UT. .HIS FLEXIBI| 000006B0: 4C 49 54 59 20 53 49 4D 50 4C 49 46 49 45 53 20 |LITY SIMPLIFIES | 000006C0: 54 48 45 20 44 49 46 46 49 43 55 4C 54 49 45 53 |THE DIFFICULTIES| 000006D0: 20 4F 46 20 D2 D3 2D 32 33 32 20 49 4E 54 45 52 | OF ..-232 INTER| 000006E0: 46 41 43 49 4E 47 20 45 41 53 49 45 52 2E 0D 0D |FACING EASIER...| 000006F0: 0D D4 C8 C5 20 D0 C1 D2 D4 D3 20 CC C9 D3 D4 0D |.... ..... .....| 00000700: 0D 0D 20 CD 4F 53 54 20 4F 46 20 54 48 45 20 50 |.. .OST OF THE P| 00000710: 41 52 54 53 20 4F 46 20 54 48 45 20 43 49 52 43 |ARTS OF THE CIRC| 00000720: 55 49 54 20 41 52 45 20 41 56 41 49 4C 41 42 4C |UIT ARE AVAILABL| 00000730: 45 20 46 52 4F 4D 20 D2 41 44 49 4F 20 D3 48 41 |E FROM .ADIO .HA| 00000740: 43 4B 20 46 4F 52 20 54 48 4F 53 45 20 4F 46 20 |CK FOR THOSE OF | 00000750: 59 4F 55 20 57 48 4F 20 41 52 45 20 54 4F 4F 20 |YOU WHO ARE TOO | 00000760: 41 4E 58 49 4F 55 53 20 54 4F 20 57 41 49 54 20 |ANXIOUS TO WAIT | 00000770: 46 4F 52 20 54 48 45 20 4D 41 49 4C 20 4F 52 20 |FOR THE MAIL OR | 00000780: D5 D0 D3 2E 20 C9 46 20 59 4F 55 20 43 41 4E 20 |.... .F YOU CAN | 00000790: 57 41 49 54 20 41 20 46 45 57 20 44 41 59 53 2C |WAIT A FEW DAYS,| 000007A0: 20 59 4F 55 20 57 49 4C 4C 20 46 49 4E 44 20 54 | YOU WILL FIND T| 000007B0: 48 45 20 50 41 52 54 53 20 41 52 45 20 41 20 4C |HE PARTS ARE A L| 000007C0: 4F 54 20 43 48 45 41 50 45 52 20 46 52 4F 4D 20 |OT CHEAPER FROM | 000007D0: 4F 4E 45 20 4F 46 20 54 48 45 20 4D 41 49 4C 20 |ONE OF THE MAIL | 000007E0: 4F 52 44 45 52 20 43 48 49 50 20 48 4F 55 53 45 |ORDER CHIP HOUSE| 000007F0: 53 20 54 48 41 54 20 41 44 56 45 52 54 49 53 45 |S THAT ADVERTISE| 00000800: 20 49 4E 20 54 48 45 20 C3 4F 4D 50 55 54 45 52 | IN THE .OMPUTER| 00000810: 20 D3 48 4F 50 45 52 2E 0D 0D 0D D0 41 52 54 20 | .HOPER.....ART | 00000820: 20 20 20 20 20 20 20 20 20 20 C4 45 53 43 52 49 | .ESCRI| 00000830: 50 54 49 4F 4E 20 20 20 20 20 20 20 20 20 20 20 |PTION | 00000840: 20 20 20 D2 41 44 49 4F 20 D3 48 41 43 4B 20 D0 | .ADIO .HACK .| 00000850: 41 52 54 20 4E 4F 2E 0D 2D 2D 2D 2D 2D 2D 2D 2D |ART NO..--------| 00000860: 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D |----------------| 00000870: 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D |----------------| 00000880: 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D |----------------| 00000890: 2D 2D 2D 2D 0D 0D D5 31 20 20 20 20 20 20 20 20 |----...1 | 000008A0: 20 20 20 20 20 37 34 30 34 20 C8 45 58 20 C9 4E | 7404 .EX .N| 000008B0: 56 2E 20 20 20 20 20 20 20 20 20 20 20 20 20 20 |V. | 000008C0: 20 20 20 32 37 36 2D 31 30 38 32 0D 0D D5 32 20 | 276-1082...2 | 000008D0: 20 20 20 20 20 20 20 20 20 20 20 20 31 34 38 38 | 1488| 000008E0: 20 CC 49 4E 45 20 C4 52 49 56 45 52 20 20 20 20 | .INE .RIVER | 000008F0: 20 20 20 20 20 20 20 20 20 20 32 37 36 2D 32 35 | 276-25| 00000900: 32 30 0D 0D D5 33 20 20 20 20 20 20 20 20 20 20 |20...3 | 00000910: 20 20 20 31 34 38 39 20 CC 49 4E 45 20 D2 45 43 | 1489 .INE .EC| 00000920: 45 49 56 45 52 20 20 20 20 20 20 20 20 20 20 20 |EIVER | 00000930: 20 32 37 36 2D 32 35 32 31 0D 0D C3 31 2D C3 34 | 276-2521...1-.4| 00000940: 20 20 20 20 20 20 20 20 20 20 31 30 30 20 55 46 | 100 UF| 00000950: 44 20 33 35 D6 20 C5 4C 45 43 54 52 4F 4C 59 54 |D 35. .LECTROLYT| 00000960: 49 43 20 20 20 20 20 20 20 20 20 20 20 20 20 20 |IC | 00000970: 20 0D 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | . | 00000980: 20 C3 41 50 41 43 49 54 4F 52 20 20 20 20 20 20 | .APACITOR | 00000990: 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 32 | 2| 000009A0: 37 32 2D 31 30 32 38 0D 0D C4 31 2D C4 33 20 20 |72-1028...1-.3 | 000009B0: 20 20 20 20 20 20 20 20 31 CE 34 30 30 31 20 C4 | 1.4001 .| 000009C0: 49 4F 44 45 20 20 20 20 20 20 20 20 20 20 20 20 |IODE | 000009D0: 20 20 20 20 20 20 32 37 36 2D 31 31 30 31 0D 0D | 276-1101..| 000009E0: D3 D7 31 2D 32 20 20 20 20 20 20 20 20 20 20 38 |..1-2 8| 000009F0: 20 D0 4F 53 49 54 49 4F 4E 20 C4 C9 D0 20 D3 57 | .OSITION ... .W| 00000A00: 2E 20 20 20 20 20 20 20 20 20 20 20 20 32 37 35 |. 275| 00000A10: 2D 31 33 30 31 0D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D |-1301.----------| 00000A20: 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D |----------------| 00000A30: 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D |----------------| 00000A40: 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D |----------------| 00000A50: 2D 2D 0D 0D 0D C1 44 44 49 54 49 4F 4E 41 4C 20 |--....DDITIONAL | 00000A60: C8 41 52 44 57 41 52 45 0D 2D 2D 2D 2D 2D 2D 2D |.ARDWARE.-------| 00000A70: 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D |----------------| 00000A80: 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D |----------------| 00000A90: 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D |----------------| 00000AA0: 2D 2D 2D 2D 2D 0D 0D D4 48 52 45 45 20 28 33 29 |-----...HREE (3)| 00000AB0: 20 31 34 20 D0 49 4E 20 D7 49 52 45 2D D7 52 41 | 14 .IN .IRE-.RA| 00000AC0: 50 20 D3 4F 43 4B 45 54 53 0D 0D D4 57 4F 20 28 |P .OCKETS...WO (| 00000AD0: 32 29 20 31 36 20 D0 49 4E 20 D7 49 52 45 2D 57 |2) 16 .IN .IRE-W| 00000AE0: 52 41 50 20 D3 4F 43 4B 45 54 53 0D 0D D0 52 4F |RAP .OCKETS...RO| 00000AF0: 54 4F 54 59 50 45 20 D0 C3 20 42 4F 41 52 44 0D |TOTYPE .. BOARD.| 00000B00: 0D 31 32 2F 32 34 20 D0 49 4E 20 C5 44 47 45 20 |.12/24 .IN .DGE | 00000B10: C3 4F 4E 4E 45 43 54 4F 52 0D 0D C4 C2 2D 32 35 |.ONNECTOR....-25| 00000B20: 20 C3 4F 4E 4E 45 43 54 4F 52 20 41 4E 44 20 C3 | .ONNECTOR AND .| 00000B30: 41 42 4C 45 0D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D |ABLE.-----------| 00000B40: 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D |----------------| 00000B50: 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D |----------------| 00000B60: 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D |----------------| 00000B70: 2D 0D 0D 0D 0D 0D D3 C5 D4 D4 C9 CE C7 20 D4 C8 |-............ ..| 00000B80: C5 20 D3 D7 C9 D4 C3 C8 C5 D3 0D 0D 0D 20 C1 53 |. ........... .S| 00000B90: 53 55 4D 49 4E 47 20 59 4F 55 20 48 41 56 45 20 |SUMING YOU HAVE | 00000BA0: 57 49 52 45 44 20 54 48 45 20 C4 C9 D0 20 53 57 |WIRED THE ... SW| 00000BB0: 49 54 43 48 45 53 20 41 43 43 4F 52 44 49 4E 47 |ITCHES ACCORDING| 00000BC0: 20 54 4F 20 54 48 45 20 44 49 41 47 52 41 4D 2C | TO THE DIAGRAM,| 00000BD0: 20 59 4F 55 20 43 41 4E 20 43 4F 4E 46 49 47 55 | YOU CAN CONFIGU| 00000BE0: 52 45 20 49 54 20 45 49 54 48 45 52 20 41 53 20 |RE IT EITHER AS | 00000BF0: 41 20 C4 D4 C5 20 4F 52 20 C4 C3 C5 20 44 45 56 |A ... OR ... DEV| 00000C00: 49 43 45 2E 20 C5 58 50 4C 41 49 4E 49 4E 47 20 |ICE. .XPLAINING | 00000C10: 41 4C 4C 20 54 48 41 54 27 53 20 49 4E 56 4F 4C |ALL THAT'S INVOL| 00000C20: 56 45 44 20 49 4E 20 C4 D4 C5 20 41 4E 44 20 C4 |VED IN ... AND .| 00000C30: C3 C5 20 49 53 20 57 45 4C 4C 20 42 45 59 4F 4E |.. IS WELL BEYON| 00000C40: 44 20 54 48 49 53 20 41 52 54 49 43 4C 45 2E 20 |D THIS ARTICLE. | 00000C50: C9 27 4C 4C 20 4A 55 53 54 20 41 53 53 55 4D 45 |.'LL JUST ASSUME| 00000C60: 20 59 4F 55 20 41 52 45 20 46 41 4D 49 4C 49 41 | YOU ARE FAMILIA| 00000C70: 52 20 57 49 54 48 20 54 48 45 20 D2 D3 2D 32 33 |R WITH THE ..-23| 00000C80: 32 20 53 54 41 4E 44 41 52 44 2E 0D 20 C1 4E 59 |2 STANDARD.. .NY| 00000C90: 57 41 59 20 49 46 20 59 4F 55 20 48 41 56 45 20 |WAY IF YOU HAVE | 00000CA0: 54 48 45 20 54 57 4F 20 C4 C9 D0 20 53 57 49 54 |THE TWO ... SWIT| 00000CB0: 43 48 45 53 20 4D 4F 55 4E 54 45 44 20 53 49 44 |CHES MOUNTED SID| 00000CC0: 45 20 42 59 20 53 49 44 45 2C 20 41 4E 44 20 54 |E BY SIDE, AND T| 00000CD0: 48 45 59 20 41 52 45 20 4E 55 4D 42 45 52 45 44 |HEY ARE NUMBERED| 00000CE0: 20 31 20 54 4F 20 38 2C 20 46 52 4F 4D 20 4C 45 | 1 TO 8, FROM LE| 00000CF0: 46 54 20 54 4F 20 52 49 47 48 54 2C 20 48 45 52 |FT TO RIGHT, HER| 00000D00: 45 20 49 53 20 48 4F 57 20 54 48 45 59 20 57 4F |E IS HOW THEY WO| 00000D10: 55 4C 44 20 42 45 20 53 45 54 0D 0D 0D C6 4F 52 |ULD BE SET....OR| 00000D20: 20 C4 D4 C5 20 C3 4F 4E 46 49 47 55 52 41 54 49 | ... .ONFIGURATI| 00000D30: 4F 4E 3A 0D 0D C4 C9 D0 20 D3 57 49 54 43 48 20 |ON:..... .WITCH | 00000D40: 23 31 3A 0D 0D 0D 20 20 20 20 31 20 20 32 20 20 |#1:... 1 2 | 00000D50: 33 20 20 34 20 20 35 20 20 36 20 20 37 20 20 38 |3 4 5 6 7 8| 00000D60: 0D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D |.---------------| 00000D70: 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 0D CF 4E |-------------..N| 00000D80: 20 20 58 20 20 20 20 20 58 20 20 20 20 20 58 20 | X X X | 00000D90: 20 20 20 20 58 20 20 20 20 20 0D 2D 2D 2D 2D 2D | X .-----| 00000DA0: 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D |----------------| 00000DB0: 2D 2D 2D 2D 2D 2D 2D 0D CF 46 46 20 20 20 20 58 |-------..FF X| 00000DC0: 20 20 20 20 20 58 20 20 20 20 20 58 20 20 20 20 | X X | 00000DD0: 20 58 20 20 0D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D | X .-----------| 00000DE0: 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D |----------------| 00000DF0: 2D 0D 0D 0D C4 C9 D0 20 D3 57 49 54 43 48 20 23 |-...... .WITCH #| 00000E00: 32 3A 0D 0D 0D 20 20 20 20 31 20 20 32 20 20 33 |2:... 1 2 3| 00000E10: 20 20 34 20 20 35 20 20 36 20 20 37 20 20 38 0D | 4 5 6 7 8.| 00000E20: 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D |----------------| 00000E30: 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 0D CF 4E 20 |------------..N | 00000E40: 20 58 20 20 20 20 20 58 20 20 20 20 20 58 20 20 | X X X | 00000E50: 20 20 20 20 20 20 20 20 20 0D 2D 2D 2D 2D 2D 2D | .------| 00000E60: 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D |----------------| 00000E70: 2D 2D 2D 2D 2D 2D 0D CF 46 46 20 20 20 20 58 20 |------..FF X | 00000E80: 20 20 20 20 58 20 20 20 20 20 58 20 20 58 20 20 | X X X | 00000E90: 58 20 20 0D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D |X .------------| 00000EA0: 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D |----------------| 00000EB0: 0D 0D 0D C6 CF D2 20 C4 C3 C5 20 C3 4F 4E 46 49 |...... ... .ONFI| 00000EC0: 47 55 52 41 54 49 4F 4E 3A 0D 0D 0D C4 C9 D0 20 |GURATION:...... | 00000ED0: D3 57 49 54 43 48 20 23 31 3A 0D 0D 0D 20 20 20 |.WITCH #1:... | 00000EE0: 20 31 20 20 32 20 20 33 20 20 34 20 20 35 20 20 | 1 2 3 4 5 | 00000EF0: 36 20 20 37 20 20 38 20 20 0D 2D 2D 2D 2D 2D 2D |6 7 8 .------| 00000F00: 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D |----------------| 00000F10: 2D 2D 2D 2D 2D 2D 0D CF 4E 20 20 20 20 20 58 20 |------..N X | 00000F20: 20 20 20 20 58 20 20 20 20 20 58 20 20 20 20 20 | X X | 00000F30: 58 20 20 0D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D |X .------------| 00000F40: 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D |----------------| 00000F50: 0D CF 46 46 20 58 20 20 20 20 20 58 20 20 20 20 |..FF X X | 00000F60: 20 58 20 20 20 20 20 58 20 20 20 20 20 0D 2D 2D | X X .--| 00000F70: 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D |----------------| 00000F80: 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 0D 0D 0D C4 C9 D0 |----------......| 00000F90: 20 D3 57 49 54 43 48 20 23 32 3A 0D 0D 0D 20 20 | .WITCH #2:... | 00000FA0: 20 20 31 20 20 32 20 20 33 20 20 34 20 20 35 20 | 1 2 3 4 5 | 00000FB0: 20 36 20 20 37 20 20 38 20 20 0D 2D 2D 2D 2D 2D | 6 7 8 .-----| 00000FC0: 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D |----------------| 00000FD0: 2D 2D 2D 2D 2D 2D 2D 0D CF 4E 20 20 20 20 20 58 |-------..N X| 00000FE0: 20 20 20 20 20 58 20 20 20 20 20 58 20 20 20 20 | X X | 00000FF0: 20 20 20 20 0D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D | .-----------| 00001000: 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D |----------------| 00001010: 2D 0D CF 46 46 20 58 20 20 20 20 20 58 20 20 20 |-..FF X X | 00001020: 20 20 58 20 20 20 20 20 58 20 20 58 20 20 0D 2D | X X X .-| 00001030: 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D |----------------| 00001040: 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 0D 0D 0D 28 CE |-----------...(.| 00001050: CF D4 C5 3A 20 C5 49 54 48 45 52 20 41 20 D2 C9 |...: .ITHER A ..| 00001060: 20 4F 52 20 41 20 C4 C3 C4 20 4C 49 4E 45 20 43 | OR A ... LINE C| 00001070: 41 4E 20 42 45 20 41 4E 20 49 4E 50 55 54 20 49 |AN BE AN INPUT I| 00001080: 4E 20 C4 D4 C5 2C 20 42 55 54 20 4E 4F 54 20 42 |N ..., BUT NOT B| 00001090: 4F 54 48 2E 20 C1 4C 53 4F 2C 20 45 49 54 48 45 |OTH. .LSO, EITHE| 000010A0: 52 20 C4 C3 C4 20 4F 52 20 D2 C9 20 43 41 4E 20 |R ... OR .. CAN | 000010B0: 42 45 20 44 52 49 56 45 4E 20 48 49 47 48 20 49 |BE DRIVEN HIGH I| 000010C0: 4E 20 41 20 C4 C3 C5 20 43 4F 4E 46 49 47 55 52 |N A ... CONFIGUR| 000010D0: 41 54 49 4F 4E 2E 20 D4 48 45 20 41 42 4F 56 45 |ATION. .HE ABOVE| 000010E0: 20 C4 C3 C5 20 43 4F 4E 46 49 47 55 52 41 54 49 | ... CONFIGURATI| 000010F0: 4F 4E 20 48 41 53 20 C4 C3 C4 20 41 53 20 48 49 |ON HAS ... AS HI| 00001100: 47 48 20 4F 55 54 50 55 54 2E 29 0D 0D 0D D2 45 |GH OUTPUT.)....E| 00001110: 4D 45 4D 42 45 52 20 54 48 41 54 20 59 4F 55 20 |MEMBER THAT YOU | 00001120: 54 41 4B 45 20 46 55 4C 4C 20 52 45 53 50 4F 4E |TAKE FULL RESPON| 00001130: 53 49 42 49 4C 49 54 59 20 46 4F 52 20 41 4E 59 |SIBILITY FOR ANY| 00001140: 20 44 41 4D 4D 41 47 45 20 54 48 41 54 20 4D 41 | DAMMAGE THAT MA| 00001150: 59 20 4F 43 43 55 52 45 20 54 4F 20 59 4F 55 52 |Y OCCURE TO YOUR| 00001160: 20 43 4F 4D 50 55 54 45 52 2E 20 C1 46 54 45 52 | COMPUTER. .FTER| 00001170: 20 59 4F 55 20 48 41 56 45 20 42 55 49 4C 54 20 | YOU HAVE BUILT | 00001180: 54 48 45 20 49 4E 54 45 52 46 41 43 45 20 48 41 |THE INTERFACE HA| 00001190: 56 45 20 53 4F 4D 45 4F 4E 45 20 45 4C 53 45 20 |VE SOMEONE ELSE | 000011A0: C3 C8 C5 C3 CB 20 59 4F 55 52 20 57 49 52 45 49 |..... YOUR WIREI| 000011B0: 4E 47 21 |NG! |
. THE CIRCUIT ITSELF IS FAIRLY SIMPLE (R
EFER TO FIGURE #2) FOR THE SCHEMATIC DIA
GRAM). THREE ICS AND A HANDFULL OF DISCR
ETE PARTS ARE USED. THE "U3" 1489 IS A Q
UAD RS-232 TO TTL LINE RECEIVER, THE "U2
" 1488 IS A TTL TO RS-232 QUAD LINE DRIV
ER. THE "U1" 7404 HEX INVERTER IS NEEDED
TO CORRECT THE BACKWARDS LEVELS OF THE
COMMODORE HANDSHAKE LINES.. ALL THE POWE
R FOR THE INTERFACE IS PROVIDED BY THE U
SER PORT. THREE 100 UFD./35 VOLT ELECTRO
LYTIC CAPACITORS AND THREE 1N1004 FORM A
VOLTAGE SOURCE FOR THE -12 TO +12 VOLTA
GES NEEDED FOR THE RS-232 LINES. THE 9 V
OLT LINES FROM THE USER PORT ARE RECTIFI
ED AND FILTERED FOR THIS. ANOTHER CLECTR
OLYTIC CAPACITOR FILTERS THE 5 VOLT LINE
FOR THE ICS.. TWO EIGHT POSITION DIP SW
ITCHES ARE USED AS CONFIGURATION SWITCHE
S. ALL 16 POSITIONS ARE USED. THE "BIG E
IGHT" RS-232 LINES CAN BE TOGGLED THROUG
H THESE SWITCHES. THE SWITCHES CAN BE SE
T TO ALLOW THE USER PORT TO ACT LIKE A T
ERMINAL (DTE) SO THAT IT WILL WORK WITH
A MODEM. BY SIMPLY RESETTING THE DIP SWI
TCHES, YOU CAN RE-CONFIGURE THE INTERFAC
E AS A "NULL MODEM" (DCE) DEVICE AND COM
MUNICATE WITH PRINTERS AND OTHER COMPUTE
RS. IN ADDITION, THE DCD AND RI LINES CA
N BE MADE TO INPUTS OR HELD HIGH. THE DI
P SWITCHES FLEXIBILITY KEEPS YOU FROM HA
VING TO CONSTRUCT DIFFERENT CABLES THAT
HAVE "HARDWIRED" CONFIGURATIONS. INSTEAD
, YOU CAN INSTANTLY SWITCH FROM ONE CONF
IGURATION TO ANOTHER.. SINCE THE DIP SWI
TCHES ARE MPOUNTED IN SOCKETS. YOU CAN U
SE THE EXTRA LONG LENGTH OF THE WIRE-WRA
P LEGS AS AN ADDITIONAL CONFIGURATION DE
VICE. BY CONNECTING THE RIGHT LEGS TOGET
HER WITH WIRE-WRAP YOU CAN HOLD ANY LINE
S PERMANENTLY HIGH OR LOW. YOU CANALSO H
AVE MORE THAN ONE LINE DRIVEN OFF THA SA
ME INPUT OR OUTPUT. THIS FLEXIBILITY SIM
PLIFIES THE DIFFICULTIES OF RS-232 INTER
FACING EASIER....THE PARTS LIST... MOST
OF THE PARTS OF THE CIRCUIT ARE AVAILABL
E FROM RADIO SHACK FOR THOSE OF YOU WHO
ARE TOO ANXIOUS TO WAIT FOR THE MAIL OR
UPS. IF YOU CAN WAIT A FEW DAYS, YOU WIL
L FIND THE PARTS ARE A LOT CHEAPER FROM
ONE OF THE MAIL ORDER CHIP HOUSES THAT A
DVERTISE IN THE COMPUTER SHOPER....PART
DESCRIPTION RADIO
SHACK PART NO..------------------------
------------------------------------..U1
7404 HEX INV.
276-1082..U2 1488 LINE DR
IVER 276-2520..U3
1489 LINE RECEIVER 276-252
1..C1-C4 100 UFD 35V ELECTROLYT
IC . CAPACIT
OR 272-1028..D1-D3
1N4001 DIODE 27
6-1101..SW1-2 8 POSITION DIP SW
. 275-1301.------------------
----------------------------------------
--...ADDITIONAL HARDWARE.---------------
----------------------------------------
-----..THREE (3) 14 PIN WIRE-WRAP SOCKET
S..TWO (2) 16 PIN WIRE-WRAP SOCKETS..PRO
TOTYPE PC BOARD..12/24 PIN EDGE CONNECTO
R..DB-25 CONNECTOR AND CABLE.-----------
----------------------------------------
---------.....SETTING THE SWITCHES... AS
SUMING YOU HAVE WIRED THE DIP SWITCHES A
CCORDING TO THE DIAGRAM, YOU CAN CONFIGU
RE IT EITHER AS A DTE OR DCE DEVICE. EXP
LAINING ALL THAT'S INVOLVED IN DTE AND D
CE IS WELL BEYOND THIS ARTICLE. I'LL JUS
T ASSUME YOU ARE FAMILIAR WITH THE RS-23
2 STANDARD.. ANYWAY IF YOU HAVE THE TWO
DIP SWITCHES MOUNTED SIDE BY SIDE, AND T
HEY ARE NUMBERED 1 TO 8, FROM LEFT TO RI
GHT, HERE IS HOW THEY WOULD BE SET...FOR
DTE CONFIGURATION:..DIP SWITCH #1:...
1 2 3 4 5 6 7 8.---------------
-------------.ON X X X X
.----------------------------.OFF X
X X X .-------------------
---------...DIP SWITCH #2:... 1 2 3
4 5 6 7 8.------------------------
----.ON X X X .------
----------------------.OFF X X
X X X .----------------------------
...FOR DCE CONFIGURATION:...DIP SWITCH #
1:... 1 2 3 4 5 6 7 8 .------
----------------------.ON X X
X X .----------------------------
.OFF X X X X .----------
------------------...DIP SWITCH #2:...
1 2 3 4 5 6 7 8 .-------------
---------------.ON X X X
.----------------------------.OFF X
X X X X .-----------------
-----------...(NOTE: EITHER A RI OR A DC
D LINE CAN BE AN INPUT IN DTE, BUT NOT B
OTH. ALSO, EITHER DCD OR RI CAN BE DRIVE
N HIGH IN A DCE CONFIGURATION. THE ABOVE
DCE CONFIGURATION HAS DCD AS HIGH OUTPU
T.)...REMEMBER THAT YOU TAKE FULL RESPON
SIBILITY FOR ANY DAMMAGE THAT MAY OCCURE
TO YOUR COMPUTER. AFTER YOU HAVE BUILT
THE INTERFACE HAVE SOMEONE ELSE CHECK YO
UR WIREING!
> CLICK IMAGE PREVIEW FOR FULL MODAL