Apple peripheral cables
| Apple peripheral cables | |
|---|---|
 |
|
| The Mini-DIN-8 printer and modem ports of a Macintosh Classic, the sockets that most Apple serial cables plug into (photo: Daniel Beardsmore, public domain) | |
| Manufacturer | Apple Computer |
| Type | Serial, printer, Apple Desktop Bus and disk drive cables |
| Interface | Mini-DIN-8 and DE-9 serial ports, Apple Desktop Bus (Mini-DIN-4), DB-19 external disk drive port |
| Compatible | Macintosh and Apple II computers and Apple printers, modems, keyboards and disk drives |
| Model | M0197, M0196, M0170, M3759LL/A, M3771LL/A, M3772LL/A, M3895LL/A, M5536LL/A, M3921LL/A, M5556LL/A |
The Apple peripheral cables are the cables Apple sold for the serial (printer and modem) ports, the Apple Desktop Bus and the external disk drive port of its computers. Apple's 1996 cable data sheet lists the serial and ADB cables of the time under "Peripheral Cables".[1] The wiring of the earlier cables is in Apple's Peripheral Interface Guide of 1991.[2] SCSI and network cables, and the PowerBook's SCSI and video cables, are on their own pages: Apple SCSI cables and terminators, Apple LocalTalk cabling, Apple Ethernet transceivers and cables and Apple PowerBook cables.
| Cable | Order number | Service number | Ends |
|---|---|---|---|
| System/Peripheral-8 Cable, 6 ft | M0197 (later M0197LL/B); beige M0187 | 590-0552 (smoke), 590-0340 (beige) | Mini-DIN-8 to Mini-DIN-8 |
| System/Peripheral-8 Cable, 10 ft and 20 ft | M3759LL/A, M3771LL/A | – | Mini-DIN-8 to Mini-DIN-8 |
| Extension Cable Peripheral-8, male to female | M3772LL/A | – | Mini-DIN-8 |
| Switch Box Cable, 6 ft, male to male | M3879LL/A | – | Mini-DIN-8 |
| Macintosh to High-Speed Modem cable | M5537LL/A | – | DB-25 to Mini-DIN-8 |
| Apple IIe Printer-8 Cable, 6 ft | A9C0314 (later A9C0314/B) | 590-0556 (smoke), 590-0335 (beige) | DB-25 to Mini-DIN-8 |
| Peripheral cable for the Macintosh 128K and 512K | M0196; beige M0185 | 590-0551 (smoke), 590-0332 (beige) | DE-9 to Mini-DIN-8 |
| Macintosh to modem cable (128K and 512K) | M0170 | 590-0197 | DE-9 to DE-9 |
| Mini-DIN-8 to DE-9 adapter | M0199 (smoke), M0189 (beige) | 590-0553 or 699-0430 (smoke), 590-0341 (beige) | Mini-DIN-8 male to DE-9 female |
| Mini-DIN-8 to DB-25 adapter | A9M0333 | 590-0550 | Mini-DIN-8 male to DB-25 female |
| IEEE 1284 Laser Printer Cable | M4235ZM/A | – | Parallel |
| ADB Coiled Keyboard Cable | M3895LL/A | – | Mini-DIN-4 |
| ADB Straight Keyboard Cable, 10 ft, male to male | M5536LL/A | – | Mini-DIN-4 |
| ADB Straight Extension Keyboard Cable, 6 ft, male to female | M3921LL/A | – | Mini-DIN-4 |
| ADB Y Adapter Cable | M5556LL/A | – | Mini-DIN-4 |
Order and service numbers are from the 1996 data sheet, the Peripheral Interface Guide and Apple's cable compatibility articles.[1][2][3]
Serial cables
[edit | edit source]Serial ports
[edit | edit source]The Macintosh 128K, 512K and 512K Enhanced have DE-9 serial ports. The Macintosh Plus and every later Macintosh with serial ports, and the Apple IIGS and IIc Plus, have Mini-DIN-8 ports.[2]
| Mini-DIN-8 pin | Signal | DE-9 pin | Signal |
|---|---|---|---|
| 1 | HSKo, handshake output (SCC DTR) | 1 | Ground |
| 2 | HSKi, handshake input (SCC CTS and clock) | 2 | +5 V |
| 3 | TxD− | 3 | Ground |
| 4 | Signal ground | 4 | TXD+ |
| 5 | RxD− | 5 | TXD− |
| 6 | TxD+ | 6 | +12 V |
| 7 | GPi, general-purpose input (SCC DCD) | 7 | HSKi |
| 8 | RxD+ | 8 | RXD+ |
| 9 | RXD− |
Pin 7 of the Mini-DIN-8 is not connected on the Macintosh Plus or LC. On the modem port of the SE, SE/30, Macintosh II family and Portable it can feed an external clock to the SCC for high-speed synchronous devices.[2]
The serial ports are not a power source. On the DE-9 ports pin 6 (+12 V) is only a power-on indicator, and the Mini-DIN-8 ports have no supply pins at all; HSKo is a handshake output, not a supply. Peripherals that took power from the old DE-9 ports, such as the Thunderscan, may not work on a Macintosh Plus or later model without an external supply.[4]
System/Peripheral-8 Cable
[edit | edit source]The System/Peripheral-8 Cable (M0197, service part 590-0552) is the standard Mini-DIN-8 serial cable. Its wiring crosses the handshake lines (pins 1 and 2) and the data pairs (pins 3 and 5, 6 and 8):[2]
| Mini-DIN-8 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
|---|---|---|---|---|---|---|---|---|
| Mini-DIN-8 | 2 | 1 | 5 | 4 | 3 | 8 | 7 | 6 |
Apple specified it for the ImageWriter II and LQ, the Apple Personal Modem, the Apple Data Modem 2400 and the AppleFax Modem on a Macintosh Plus or later, an Apple IIGS or an Apple IIc Plus.[2] Apple's 1994 and 1995 lists add the StyleWriter family, the Personal LaserWriter LS and 300 and the LaserWriter Select 300 and 310.[3] By 1996 it came in 6, 10 and 20 ft lengths, with a male-to-female extension and a 6 ft male-to-male cable for switch boxes.[1] The charts for the other ImageWriter cables are on Apple ImageWriter II Cable.
Modem cables
[edit | edit source]For the Hayes Smartmodem and most Hayes-compatible modems, Apple named its Apple II Printer-8 Cable (A9C0314) as the cable from a Macintosh Plus, SE or II.[5] A home-made cable needs at least these connections: Mini-DIN-8 pin 1 to DB-25 pin 20 (DTR), pin 3 to pin 2, pin 4 to pin 7 (ground) and pin 5 to pin 3.[5] Modems that use CTS/RTS hardware flow control also need DB-25 pin 5 connected to Mini-DIN-8 pin 2 and DB-25 pin 4 connected to Mini-DIN-8 pin 1.[6] Apple's own cable for such modems in 1996 was the Macintosh to High-Speed Modem cable, M5537LL/A.[1]
For the Macintosh 128K, 512K and 512K Enhanced, the Modem 300 and Modem 1200 used cable 590-0197 (M0170), DE-9 at both ends. On a Macintosh Plus or later the same cable needs adapter 590-0341 or 590-0553.[2]
| DE-9 | 3 and 8 | 5 | 6 | 7 | 9 |
|---|---|---|---|---|---|
| DE-9 | 3 and 8 | 9 | 6 | 7 | 5 |
Apple's 1988 article on interface cable pin-outs draws 590-0197-A differently, with pin 1 to pin 8, 3 to 3, 5 to 9, 6 to 6, 8 to 1 and 9 to 5.[7] Check an unknown cable with a meter before relying on either.
Adapters
[edit | edit source]Two adapters let older cables reach the Mini-DIN-8 ports:[2]
| Mini-DIN-8 | 1 | 2 | 3 | 4 | 5 | 6 | 8 |
|---|---|---|---|---|---|---|---|
| DE-9 | 6 | 7 | 5 | 3 and 1 | 9 | 4 | 8 |
| Mini-DIN-8 | 1 | 2 | 3 | 4 and 8 | 5 | 7 | Shield |
|---|---|---|---|---|---|---|---|
| DB-25 | 6 | 20 | 3 | 7 | 2 | 4 and 5 | Shield |
Cable length
[edit | edit source]Apple's guide to RS-232 cable length allows 50 ft of average cable (50 pF per foot) at 19,200 baud, 100 ft at 9600 baud, 200 ft at 4800 baud and 800 ft at 1200 baud, with longer runs for low-capacitance cable.[8]
Printer cables
[edit | edit source]Apple's serial printers use the cables above: the System/Peripheral-8 Cable on a Macintosh Plus or later, an Apple IIGS or an Apple IIc Plus; the DE-9 cable 590-0551 on the Macintosh 128K and 512K; and the DB-25 cables 590-0555 and 590-0556 on a Super Serial Card in an Apple II, II Plus or IIe. All of these are charted on Apple ImageWriter II Cable.[2] With the Apple IIe Printer-8 Cable (A9C0314, 590-0556) the Super Serial Card jumper goes to Terminal; with 590-0555 (A2C0312) it goes to Modem.[9] The original ImageWriter and ImageWriter 15-inch use cable 590-0169 (M0150) from the DE-9 port, with adapter 590-0341 or 590-0553 on a Macintosh Plus or later.[2]
LaserWriters connect over LocalTalk, and later models over Ethernet as well; see Apple LocalTalk cabling.[3] Apple's 1996 data sheet also lists an IEEE 1284 parallel cable, M4235ZM/A, for its laser printers.[1]
Never connect a serial printer to the DB-25 SCSI port of a Macintosh. On a Macintosh Plus it damages the logic board; see Macintosh SCSI port.[10]
Disk drive cables
[edit | edit source]The Macintosh external disk drive port is a 19-pin D connector.[2]
| Pin | Signal | Pin | Signal | Pin | Signal |
|---|---|---|---|---|---|
| 1 | Ground | 8 | +12 V | 15 | WRREQ/, write request |
| 2 | Ground | 9 | Not connected | 16 | HDSEL, head select |
| 3 | Ground | 10 | PWM, motor speed control | 17 | ENBL2/, read line enable |
| 4 | Ground | 11 | PH0, command line | 18 | RD, read data |
| 5 | −12 V | 12 | PH1, command line | 19 | WR, write data |
| 6 | +5 V | 13 | PH2, command line | ||
| 7 | +12 V | 14 | PH3, command line |
The port is on every Macintosh except the Macintosh II, IIx and IIfx. In the 1991 guide, the 400K External Drive works with the 128K, 512K, 512K Enhanced, Plus, SE and Portable; the 800K External Drive and the Apple 3.5 Drive with the 512K Enhanced, Plus, SE, SE/30, Classic, IIcx, IIci, IIsi, LC and Portable; the FDHD External Drive with the SE (with the FDHD upgrade), SE/30, Classic, IIcx, IIci, IIsi, LC and Portable; and the Hard Disk 20 with the 512K, 512K Enhanced, Plus and SE.[2] No Macintosh can daisy-chain floppy drives; only the Apple II family can.[11] Apple advised against cable longer than 30 inches between a Macintosh and a Hard Disk 20, because of cable capacitance and voltage drop.[12]
The DuoDisk's cable, 590-0114, which Apple calls the DB-19-to-disk cable, has a DB-25 connector at one end and a DB-19 at the other. Apple's specification requires each wire connection to hold 3 lb, each contact 10 lb and the whole cable a 15 lb pull.[13]
| DB-25 | Function | DB-19 | DB-25 | Function | DB-19 |
|---|---|---|---|---|---|
| 2 | Ground | 1 | 8 | ENBL B | 9 |
| 4 | Ground | 2 | 12 | WR PROT | 10 |
| 9, 21 | Ground | 3 | 15 | Phase 0 | 11 |
| 10, 14 | Ground | 4 | 16 | Phase 1 | 12 |
| 23 | −12 V | 5 | 17 | Phase 2 | 13 |
| 7 | +5 V | 6 | 18 | Phase 3 | 14 |
| 19 | +12 V | 7 | 5 | WR REQ | 15 |
| 20 | 12 V | 8 | 24 | +5 V | 16 |
| 11 | ENBL A | 17 | 3 | RD DATA | 18 |
| 6 | WR DATA | 19 | 1, 13, 22, 25 | Not connected | – |
Inside a Macintosh, the flat cable to the floppy drive depends on the mechanism. The Apple 3.5 Drive mechanism (661-0345, Sony MFD-51W-03, red on silver label) needs the yellow-striped cable 590-0437; the older 800K mechanism (661-0305, MFD-51W or 51W-10, black on silver label) needs the red-striped cable 590-0167. The newer mechanism also fits the external 800K drive and the UniDisk 3.5, but the older one must not be fitted in an Apple 3.5 Drive.[14] For drive repairs see Floppy Drive Repair.
ADB cables
[edit | edit source].jpg)
Apple Desktop Bus cables are four-wire Mini-DIN-4 cables. Pin 1 is the data line, pin 2 the power-on signal (used only on the Macintosh II family), pin 3 +5 V and pin 4 ground. The total length of all ADB cables should not exceed 5 metres (16 feet).[2] The full electrical description is on Apple Desktop Bus.
Apple's keyboards came with their cables: a 1.0 m (3 ft) ADB cable with the Apple Extended Keyboard II, and a 3 ft (1.0 m) coiled cord and a 340 mm (13.4 in) cable with the Apple Adjustable Keyboard.[15][16] By 1996 Apple sold a coiled keyboard cable, a 10 ft straight cable, a 6 ft extension and a Y adapter separately.[1] Apple's 1995 article on extending ADB beyond 5 m lists only third-party products, among them Kensington's 8 ft Extra Long ADB Keyboard Cable, and warns that a much longer cable brings resistance, noise, ringing and ground problems that need line drivers or repeaters.[17]
Shut the computer down before plugging or unplugging any ADB device. On the Macintosh II the +5 V line of the ADB port is protected by a 1 A, 125 V AC normal-blow fuse soldered to the logic board, and Apple's service answer to a blown ADB fuse was a new logic board.[18][19] The Macintosh IIcx instead has resettable fuses on its ADB, serial and SCSI circuits, which recover when the computer is switched off and on again.[20]
Faults
[edit | edit source]| Symptom | Probable cause | Action |
|---|---|---|
| Mouse pointer jumps about the screen | Loose ADB cable between mouse and keyboard or keyboard and computer | Shut down, switch off and secure the connections[21] |
| Keyboard and mouse dead after an ADB device was plugged in with the power on | ADB fuse blown | On a Macintosh II the fuse is soldered to the logic board; on a IIcx switch off and on to reset it[19][18][20] |
| Keyboard plugged in after start-up does not work | ADB was not designed for devices to be connected while the computer runs | Shut down, connect it and restart[19] |
| A peripheral that worked on a Macintosh 512K does not work on a Macintosh Plus or later | It drew power from pin 2 or 6 of the DE-9 serial port, which later ports do not have | Give it its own power supply[4] |
| A modem that needs CTS/RTS hardware flow control does not work properly | Cable without the CTS and RTS lines | Use a hardware-handshake cable: DB-25 pin 5 to Mini-DIN-8 pin 2 and pin 4 to pin 1, as well as pin 20 to pin 1[6] |
| Hard Disk 20 unreliable on a long cable | Cable over 30 inches, or unshielded or flat cable | Keep the cable to 30 inches or less, shielded[12] |
| Mac Plus logic board dead after a printer was connected | Serial printer plugged into the SCSI port | Replace the logic board[10] |
Related pages
[edit | edit source]- Apple ImageWriter II Cable
- Apple Desktop Bus
- Apple SCSI cables and terminators
- Apple LocalTalk cabling
- Floppy Drive Repair
References
[edit | edit source]- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 Apple Computer, Apple Cable Solutions data sheet, October 1996, L02069A, p. 2, "Peripheral Cables". Hosted as File:Apple Cable Solutions data sheet (1996).pdf. Supports: Apple IIe Printer-8 Cable (6 ft.) A9C0314/B; Apple System/Peripheral-8 Cable 6 ft. M0197LL/B, 10 ft. M3759LL/A and 20 ft. M3771LL/A; Apple M/F Extension Cable Peripheral-8 M3772LL/A; Apple M/M Switch Box Cable (6 ft.) M3879LL/A; Apple IEEE 1284 Laser Printer Cable M4235ZM/A; ADB Coiled Keyboard Cable M3895LL/A; ADB Straight Keyboard Cable M/M (10 ft.) M5536LL/A; ADB Straight Extension Keyboard Cable M/F (6 ft.) M3921LL/A; ADB "Y" Adapter Cable M5556LL/A; Macintosh to High-Speed Modem DB-25-Din-8 M5537LL/A.
- ↑ 2.00 2.01 2.02 2.03 2.04 2.05 2.06 2.07 2.08 2.09 2.10 2.11 2.12 Apple Computer, Peripheral Interface Guide, 7th edition, rev. January 1991. Hosted as File:Apple Service Technical Procedures Peripheral Interface Guide Jan 1991.pdf. Pages as cited: Macintosh Family Computers, Computer Ports, "Modem and Printer Connectors - DE-9", p. 6 (PDF p. 10); "Modem and Printer Connectors - Mini DIN-8", p. 7 (PDF p. 11); "Apple Desktop Bus Connector", p. 10 (PDF p. 14); "External Disk Drive Connector", p. 13 (PDF p. 17); Peripheral Connections, pp. 25-26 (PDF pp. 29-30); Cables, "Serial Cables", pp. 7-9 (PDF pp. 133-135).
- ↑ 3.0 3.1 3.2 Apple Computer, Tech Info Library articles 16382 to 16385, Apple IIc Plus, Apple II/II+/IIe, Apple IIgs and Macintosh: Cable Compatibility (September 1994 to July 1995), in the archive.org collection APPLE_TIL_ARTICLES, file TIL09433_to_TIL17062.pdf. Supports: the cable for each Apple printer, modem and SCSI device on each computer, with finished-goods and service numbers, including M0197/590-0552, M0170/590-0197, M0150/590-0169, A9C0314/590-0556, A2C0312/590-0555, A9M0333/590-0550 and the Super Serial Card jumper settings.
- ↑ 4.0 4.1 Apple Computer, Tech Info Library article 3202, Macintosh: Serial Ports Do Not Provide Power For Peripherals, created 1 July 1985, reviewed 30 June 1992, in the archive.org collection APPLE_TIL_ARTICLES, file TIL00001_to_TIL09432.pdf.
- ↑ 5.0 5.1 Apple Computer, Tech Info Library article 1785, Macintosh: Cable or Pin Connections to Hayes External Modems, created 29 January 1988, in the archive.org collection APPLE_TIL_ARTICLES, file TIL00001_to_TIL09432.pdf. Supports: cable A9C0314, the Apple II Printer-8 Cable, for a Macintosh Plus, SE or II to a Hayes modem; the minimum connections Mini-DIN-8 1, 3, 4 and 5 to DB-25 20, 2, 7 and 3.
- ↑ 6.0 6.1 Apple Computer, Tech Info Library article 14799, Modem Cables Requirements for ARA 2.0 (3/94), created 4 March 1994, in the archive.org collection APPLE_TIL_ARTICLES, file TIL09433_to_TIL17062.pdf.
- ↑ Apple Computer, Tech Info Library article 1429, Apple Interface Cable Pin-Outs, last reviewed 2 November 1988, in the archive.org collection APPLE_TIL_ARTICLES, file TIL00001_to_TIL09432.pdf. Supports: wiring of cables 590-0029, 590-0037-B, 590-0169, 590-0197-A, 590-0191-A, 57-30360 and 590-0042-B.
- ↑ Apple Computer, Tech Info Library article 1754, RS-232 Cables: Maximum acceptable length depends on data rate, created 18 February 1986, reviewed 9 June 1992, in the archive.org collection APPLE_TIL_ARTICLES, file TIL00001_to_TIL09432.pdf. Supports: maximum lengths of average (50 pF per foot) and special cable from 19,200 to 300 baud.
- ↑ Apple Computer, Tech Info Library article 11995, Imagewriter LQ: Connector Cables for Apple Computers (3/95), created 16 April 1993, reviewed 14 March 1995, in the archive.org collection APPLE_TIL_ARTICLES, file TIL09433_to_TIL17062.pdf. Supports: M0196 for the Macintosh 512K; M0197 or the M2068 LocalTalk connector for later Macintosh models and the Apple IIGS; A9C0314 with the Super Serial Card jumper on Terminal, or A2C0312 with it on Modem, for the Apple II, II Plus and IIe; A2C4313 for the Apple IIc; M0197 for the IIc Plus.
- ↑ 10.0 10.1 Apple Computer, Tech Info Library article 1687, Macintosh Plus: Serial Printer Damages SCSI Port, created 23 January 1986, in the archive.org collection APPLE_TIL_ARTICLES, file TIL00001_to_TIL09432.pdf.
- ↑ Apple Computer, Tech Info Library article 8455, Macintosh: Daisy-Chaining 3.5-Inch Floppy Drives Not Supported, created 14 June 1991, in the archive.org collection APPLE_TIL_ARTICLES, file TIL00001_to_TIL09432.pdf.
- ↑ 12.0 12.1 Apple Computer, Tech Info Library article 1957, Hard Disk 20: Cable length limit with Macintosh, last reviewed 17 May 1986, in the archive.org collection APPLE_TIL_ARTICLES, file TIL00001_to_TIL09432.pdf.
- ↑ Apple Computer, Tech Info Library article 2396, DuoDisk: Cable Specifications and Pinouts, created 13 January 1988, expanded 14 December 1992, in the archive.org collection APPLE_TIL_ARTICLES, file TIL00001_to_TIL09432.pdf. Supports: the pull and contact specifications; the DB-25 to DB-19 pinout of cable 590-0114; DB-25 pins 1, 13, 22 and 25 not connected.
- ↑ Apple Computer, Tech Info Library article 1605, Apple 800K Drive Mechanism and Cable Compatibility, last reviewed 6 January 1988, in the archive.org collection APPLE_TIL_ARTICLES, file TIL00001_to_TIL09432.pdf. Supports: the two mechanisms, their part numbers and labels, the internal cables 590-0437 (yellow stripe) and 590-0167 (red stripe), and which enclosures each mechanism fits.
- ↑ Apple Computer, Tech Info Library article 5214, Apple Extended Keyboard II: Specifications (10/94), created 15 June 1990, in the archive.org collection APPLE_TIL_ARTICLES, file TIL00001_to_TIL09432.pdf. Supports: the packing list with a 1.0 m (3 ft.) ADB cable.
- ↑ Apple Computer, Tech Info Library article 11225, Apple Adjustable Keyboard: Specifications (Discontinued) (5/95), created 6 January 1993, in the archive.org collection APPLE_TIL_ARTICLES, file TIL09433_to_TIL17062.pdf. Supports: two cables, a 3-ft. (1.0 m) coiled cord and a 13.4-in. (340 mm) cable.
- ↑ Apple Computer, Tech Info Library article 12341, ADB Cable Extensions: Third-Party Solutions (1/95), created 4 August 1993, reviewed 6 January 1995, in the archive.org collection APPLE_TIL_ARTICLES, file TIL09433_to_TIL17062.pdf. Supports: the 5-metre maximum; the problems of a long ADB cable; Kensington's 8-foot Extra Long ADB Keyboard Cable, "4-feet longer than the standard Macintosh cable"; other third-party ADB extenders.
- ↑ 18.0 18.1 Apple Computer, Tech Info Library article 3751, Macintosh II ADB Port: Fuse Specifications, created 21 February 1989, in the archive.org collection APPLE_TIL_ARTICLES, file TIL00001_to_TIL09432.pdf.
- ↑ 19.0 19.1 19.2 Apple Computer, Tech Info Library article 7741, ADB Devices: Don't Connect/Disconnect while Computer Is On, last reviewed 15 July 1990, in the archive.org collection APPLE_TIL_ARTICLES, file TIL00001_to_TIL09432.pdf. Supports: ADB not designed for connection with the power on; the ADB fuse soldered to the logic board and the board needing replacement if it blows.
- ↑ 20.0 20.1 Apple Computer, Tech Info Library article 3511, Macintosh IIcx: General Description (Discontinued), created 7 March 1989, in the archive.org collection APPLE_TIL_ARTICLES, file TIL00001_to_TIL09432.pdf. Supports: three fuses on the IIcx logic board protecting the ADB, serial and SCSI circuits, reset by powering down and up.
- ↑ Apple Computer, Tech Info Library article 12970, Macintosh: Cure for Jumpy Pointer (8/93), created 16 August 1993, in the archive.org collection APPLE_TIL_ARTICLES, file TIL09433_to_TIL17062.pdf.