CPCWiki - THE Amstrad CPC encyclopedia! - User contributions [en]

Talk:Modify PC floppy drives

2008-10-14T07:19:16Z

SpaceRat:

I have the SFD-321B/EZ floppy drive and its C16 soldering pads are empty from factory. How to mod it to DD-only then?

[[Image:Sfd-321b.jpg|thumb|left|SFD-321B/EZ]]

Unfortunately I don't know the answer, but try posting in the forum maybe... [[User:Gryzor|Gryzor]] 10:36, 2 October 2008 (UTC)

::This model is similar, but not identical to those I recommended. But it looks good, as it still has the DC/RDY zero-ohm-resistors. About the DD-only: The basic difference between the revision I used and the drive on the picture is, that the pictured one HAS a switch for DD/HD detection mounted, so it is not hard-wired in either way. You can still close the HD-index hole on your disks with adhesive tape. In order to make the drive DD-only, it SHOULD be sufficient to remove SW1 completely, or to disconnect its connections to the board. (Pure logic: C16 connected = HD-only, C16 open and no switch = DD-only -> SW1 opens for DD disks and closes for HD disks -> SW1 removed or isolated = it can not close anymore).
::Alternative: Destroy the connection on the board that goes away from the topmost pin of SW1 via C16 (Note the junction that connects the connection from the topmost pin of SW1 to the left soldering point of C16). [[User:SpaceRat|SpaceRat]] 07:19, 14 October 2008 (UTC)

ParaDOS

2007-11-04T13:35:36Z

SpaceRat:

The ultimate [[DOS]] for 3½" drives, coded by [[Executioner|Richard Wilson]] and initially marketed by [[Quantum Computing]].

ParaDOS was a complete replacement for the standard 16k [[AMSDOS]] ROM. The first 8k was a patched version of the standard AMSDOS code, with the second 8k used for the large-format patch code and a user-friendly disc utility (accessed by the |DRIVE command without any parameters). Among the functions of the utility were fast file copying and batch erasing.

ParaDOS largely supplanted [[ROMDOS]] as the OS of choice among CPC users. Unlike ROMDOS, ParaDOS made no check for the presence of an AMSDOS ROM on sign-on. This enabled it to be used in ROM 7 as a direct replacement for AMSDOS, improving compatibility with programs which unthinkingly initialised ROM 7 alone. This, however, also cast some doubts on the propriety of its intellectual property stance. It is likely that ParaDOS would have been questioned more rigorously had it not been introduced towards the end of the CPC's commercial life.

== Manual ==

From The Unofficial Amstrad WWW Resource web of Kevin Thacker, on documents :

http://andercheran.aiind.upv.es/~amstrad/docs/manual/parados.pdf

Direct from the CPCWIKI: [[Media:parados.pdf|Parados Manual]] (pdf)

== Links ==

From the Winape web of Richard Wilson on the others downloads section you can download :

- ParaDOS ROM
- ParaDOS Source

http://www.winape.net/downloads.jsp

[[category:Operating System]] [[category:Expansion ROM]] [[category:Manual]]

Amstrad External Disk Drive

2007-11-04T12:29:29Z

SpaceRat:

'''Amstrad''' made two different disk drives for the Amstrad/Schneider CPC range:

* DDI-1 - a set, consisting of the real DDI-1 (= Disk Drive Interface) and a FD-1 3" disk drive, as well as the CP/M 2.2 license and disk. This set was for the CPC464, which doesn't have the disk controller built-in.
* FD-1 - a 3" disk drive as secondary disk drive unit for the CPC664, CPC6128 and CPC464 with DDI-1

Note that there was no official external disk drive for the 6128Plus or even the 464Plus. While the difference between a CPC664/CPC6128 and a 6128Plus was simply a changed pin-out which can easily be solved by a new plug on the disk drive's cable, the 464Plus was harder to equip with a disk drive: Although the pin-out of the expansion port was left unchanged, the DDI-1 cannot be operated on the 464Plus without modifications.

[[Image:ddi1.gif|thumb|Amstrad FD-1/DDI-1 disk drive]]

Technically speaking, the two disk drives were identical, the only difference was that the DDI-1 shipped with controller, manual and CP/M 2.2 on one disk.

The disk drives were jumpered (rather: soldered) to react on both drive selects, A: and B:.

The cable decided which drive became A: and which one became B: :

* On the CPC664 and CPC6128 computers, DRIVE SELECT 0 was not wired externally, so the drive could only become drive B: on these systems.
* For the DDI-1, DRIVE SELECT 0 was only wired to the outmost connector of the attached cable, while the inner connector was wired to DRIVE SELECT 1 only, thus the drive at the cable's end always became A: while the other one became drive B: accordingly.

Note that the drive also powered the DDI-1 interface when used together with it: Certain pins documented as N/C in the CPC664/CPC6128 manual in fact carry +5V from the drive to the controller.
The main benefit of this was, that you couldn't connect a standard drive with a more common format (5¼" in the beginning, 3½" later and today) and thus cheaper disks as drive A: without modifications, as the DDI-1 won't work without the power fed from the FD-1.

[[Category:Hardware]] [[Category:Peripherals]]

Peripherals

2007-11-04T12:13:49Z

SpaceRat: /* Disc Drives */

''Please try to keep things in alphabetical order.''

== Data transfer ==

=== Modems ===

* [[Commstar v21/23 modem]]
* [[Digitelec DTL 2000/2100 Modem]]

=== Serial Interfaces ===

* [[AMSSIO]] (RS232 interface) (DIY)
* [[Amstrad Serial Interface]]
* [[Cirkit serial interface]]
* [[CPCI RS232 Interface]] (DIY)
* [[KDS Electronics Serial Interface]]
* [[SCA CPC Prolink]]

=== Others ===

* [[CPC Booster|CPC Booster/CPC Booster+]]
* [[Virtual Net 96]] ([[Wizcat]])

== Digitizer ==

* ARA digitizer
* [[Dart Scanner for DMP-Printers]]
* [[VIDI digitizer]] ([[Rombo Productions]])

== Drives ==

=== Disc Drives ===

* [[3½" & 5¼" Disk Drives]]
* [[Amstrad Disk Drive|Amstrad DDI-1 Disk Drive]]
* [[Amstrad Disk Drive|Amstrad FD-1 Disk Drive]]
* [[Cumana 3" Disk Drive]]
* [[Data Media Disc System]]
* [[Jasmin AM5D 5 "1/4 floppy drive]]
* [[KDS Electronics]] [[KDS 5¼" Drive|5¼" Disc Drive]]
* [[Vortex Computersysteme#F1|Vortex F1/D]]
* [[Vortex Computersysteme#F1|Vortex F1/S]]
* [[Vortex Computersysteme#F1|Vortex F1-X(RS)]]
* [[Vortex Computersysteme#F1|Vortex F1/Z]]
* [[Vortex Computersysteme#M1|Vortex M1/D]]
* [[Vortex Computersysteme#M1|Vortex M1/S]]
* [[Vortex Computersysteme#M1|Vortex M1-X(RS)]]
* [[Vortex Computersysteme#M1|Vortex M1/Z]]

=== Hard Disc Drives ===

* [[Dobbertin Harddisc]]
* [[IDE8255]] internal/extrernal IDE/CF interface
* [[Vortex Winchester Drive]]

== Guns ==

* [[Gunstick]]
* [[Lightgun ( Trojan )]]
* [[Amstrad Magnum Phaser|Magnun Light Phaser ]]
* [[Loriciel Phaser (West Phaser)|West Phaser ( Loriciel )]]

== Hardware debuggers/Hacking devices ==

* [[Hackit|Hackit / Le Hacker]] ([[Siren Software]])
* [[Mirage Imager]]
* [[Multiface II]] ([[Romantic Robot]])
* [[Transtape|Transtape ( Hard Micro )]]

== Input devices ==

=== Light-Pens ===

* [[Amstrad LP-1 light pen]]
* [[ASS]] Light-Pen
* [[dk'tronics Lightpen]]
* [[Light Pen "Professionel" / Mark II]]

=== Others ===

* [[Amstrad JY-1/JY-2 joysticks]]
* [[CPCKey|Attaching a AT keyboard to the CPC]]
* [[Grafpad II]]
* [[Joystick Y-cables]]

== Memory expansions / ROM boxes ==

=== Memory Expansions / RAM box ===

* [[CPC4MB| CPC4MB - 4 MB memory expansion]]
* [[Dk'tronics memory expansion‎]]
* [[Dk'tronics Silicon Disc]]
* [[Dobbertin EPROM 224]]
* [[Dobbertin Memory Expansion]]
* [[Dobbertin]] [[Universeller EPROM Programmer 4004]]
* [[RAM BOX]] 512Kb memory expansion
* [[RAM7 2Mb memory expansion]]
* [[Vortex Computersysteme#SP|Vortex SP 64 - SP 512]] RAM expansion
* [[Inicron RAM-Box]]

=== ROM box / ROMboard ===

* [[HX-RX1|Cirkit HX-RX1 Rom Expansion Card]]
* [[CPC.Flash]] internal/external 4MB ROM upgrade
* [[Dobbertin ROMboard]]
* [[Maplin ROM Box]]
* [[Microstyle Romboard Xtra]]
* [[Ramcard]] (RAM7 Writeable ROM expansion)
* [[Rombo Rombox]] ([[Rombo Productions]])
* [[Inicron ROM-RAM-Box]]
* [[Micro Power ROM Box]]
* [[X-ROM]] ROM expansion and ROM burner

== Mouse ==

* [[AMX Mouse|Advanced Memory Systems AMX Mouse]]
* [[Atari-ST mouse adapter]]
* [[dk'tronics Mouse Interface]]
* [[Gerdes|Gerdes Mouse]]
* [[Centaure mouse]]
* [[ASS Reis-Mouse]]
* [[Wireless mouse (DIY)]]

== Monitors ==

* [[Amstrad]] [[CM14]] Colour Monitor
* [[Amstrad]] [[CTM640/CTM644]] Color Monitor
* [[Amstrad]] [[GT64/GT65]] Green Monitor
* [[Amstrad]] [[MM12]] Monochrome Monitor
* [[Amstrad]] [[MP1]]/MP2 modulator
* CPCAI HF-modulator (CPC Schneider International 11/1986, Page 78ff. Someone please scan it, my issue lacks those pages!)
* [[MP2F|Amstrad MP-2F Scart Adapter]]
* [[MP-3|Amstrad MP-3 TV modulator for CTM 64x]]
* [[TV SCART cable]]

== Multi function expansions ==

* [[CPC Booster|CPC Booster/CPC Booster+]]
* [[SYMBiFACE II]]
* [[CPCMax!]]
* [[CPCISA by Yarek]]
* [[CPCX]]

== Printers ==

* Amstrad [[DMP1]] printer
* Amstrad/Schneider [[DMP2000]] Printer
* Amstrad/Schneider [[DMP2100]] Printer
* Amstrad [[DMP2160]] printer
* Amstrad [[DMP3000]] printer
* Amstrad [[DMP3160]] printer
* Amstrad [[DMP3250]] printer
* Amstrad [[DMP4000]] printer
* [[Robotron 6313|EuroPrint FT80X]]
* [[Robotron 6313|Präsident 6320]]
* [[Robotron 6313]]
* [[NLQ401|Schneider NLQ401]]
* [[Star Printers]]

== Synthesizer, sampler and music related ==

* [[Amdrum]]
* [[Amstrad SSA-1 Speech Synthesizer]]
* [[Digiblaster]]
* [[Digivox sampler]]
* [[Dk'tronics Speech Synthesizer]]
* [[DHCP MIDI Interface]]
* [[EMR MIDI Interface]]
* [[Music Machine]]
* [[Silicon Systems MIDI Interface]]
* [[Sound Blaster ( Siren Software )]]
* [[TechniMusique speech synthetizer]]
* [[TMPI speech synthetizer]]

== Miscellaneous ==

* 64 Kb Printer Buffer (DIY)
* [[Amstore|Northern Computers Amstore]]
* [[CPCISA by Yarek|CPCISA]]
* dk'tronics Real Time Clock
* dk'tronics Utopia OS
* Dobbertin Real Time Clock
* FO-Dos card
* [[Fischertechnik robot]]
* [[Graphiscop II]]
* HDCPC
* [[Kersten PC Emulator]]
* Loritel
* [[Real Time Clock]] (DIY)
* [[RAM7 Cartridge Hacker]]
* Robot (DIY)
* [[TC-1|Amstrad TC-1 Radio/Alarm-Clock]]
* [[Split Extension Connector|Cheetah Marketing Split Extension Connector]]
* [[KDS Electronics]] [[KDS Power Controller|Power Controller]]

[[Category:Peripherals|*]]

2007-11-04T12:12:15Z

SpaceRat: 3 1/2" & 5 1/4" Disk Drives moved to 3½" & 5¼" Disk Drives: Formal correctness. The easier to type link will still be redirected.

Besides the "big" brands' disk drives for the Amstrad CPC, there were also user solutions and garage company made disk drives for the Amstrad CPC.
These usually came without controller and own DOS, so in order to use the full capacity of such drives, you had to replace the built-in AMSDOS with a DOS like ParaDOS or a patched AMSDOS.
But even without a special DOS taking use of the higher capacity, the use of such drives made sense, as media were much cheaper than 3" media.
Today, with supplies of 3" disks draining and company solutions no longer being produced, a self-made 3½" disk drive is the perfect supplement for every CPC user, especially as it makes the data exchange between CPC and PC much easier.

== Notes ==

* '''Whereever possible, the wire numbers from the PC standard were used!''' (See the article about the connector for the reason why: [[Connector:2nd disc drive (CPC664, CPC6128, CPC6128+)]]

* These schematics differ from most existing schematics on the web in that way, that they don't use GND to pull signals active low, but the /DRIVE SELECT line via diode. This ensures that the other drive on the bus doesn't become influenced. You can solder the wire containing the diode directly (without the diode) to a GND-wire and you will get the same as described in other tutorials but the side switch and - if applicable - the signal RDY will also be in effect for the other disk drive then. We will refer to this as "permanent" (signal is active all time/for all drives) vs. "semi-permanent" (signal is active while accessing the specific drive only).

* The universal solution connects a 3" or 3½" disk drive to any CPC with disk controller
** You can even use Part A for connecting a 3" disk drive to a CPC664/CPC6128/CPC6128plus and Part Bx for connecting a 3½" disk drive to a CPC464 with DDI-1 at the same time
** Part Bx, which is also the full cable for the CPC464 with DDI-1, can even be used to connect the PC drive as A: on the DDI-1, though this doesn't work with all drives, probably due to the drive's RDY-conditions during power up not being met by the CPC-controller (Old TEAC drives with lots of jumpers are known to work, while some other brands won't, although they have a RDY-signal sufficient for the operation as drive B:. In such cases you will either need to play with the drives MOTOR ON jumpers, get a "better" drive or a (semi-)permanent RDY even for drives with own RDY.)

* Although schematics for drives without own RDY-Signal are included, it is highly recommended to use drives with RDY to ensure maximum compatibility. However, drives that can simply be jumpered for a proper RDY-signal aren't made any more and can probably only be bought used. Though, some drives that are still be sold or were still be sold recently can be [[Modify PC floppy drives|modified]] for a RDY-signal. Keep the limitations from the previous note in mind when using such a drive as A:. This especially applies to modified (rather than jumpered) drives.

* Hints for fitting cut/squeeze plugs on flat-ribbon cable (Assuming you were building the cable according to the PC wire numbers with red wire = wire 1), connectors seen from back:
** Schneider/Amstrad CPC6128 with Centronics connector: Red wire showing to the right with two free pins on the right end of the connector (Mainly Schneider, but also the Amstrad CPC6128 sold in Germany. Many of these Schneider CPC6128 were also sold in France)
** Amstrad CPC664/CPC6128: Red wire showing away from orientation nose inside the connector
** Amstrad CPC6128plus: Red wire showing to the right with three unused pins on the left end of the connector (red wire not connected/overlapping end of connector)

== Schematics ==

=== Universal solution (CPC464+DDI-1, CPC664, CPC6128, CPC6128 German and CPC6128plus) ===

==== Part A: Replacement cable for original Amstrad/Schneider FD-1 ====

[[Image:Universal FD-1.jpg|frame|none|Identical to the cable for the FD-1 except that it is for the CPC664, CPC6128 and CPC6128plus at the same time]]

==== Part B1: Makes a PC disk drive with RDY behave like a DDI-1 ====

[[Image:DDI-1 - 3.5 w RDY.jpg|frame|none|Makes a PC disk drive with RDY behave like a DDI-1]]

==== Part B2: Makes a PC disk drive without RDY behave like a DDI-1 ====

[[Image:DDI-1 - 3.5 wo RDY.jpg|frame|none|Makes a PC disk drive without RDY behave like a DDI-1]]

=== Amstrad/Schneider CPC464 with DDI-1 ===

See Part B1 or Part B2 as shown in sections 2.1.2 or 2.1.3 accordingly.

=== Amstrad/Schneider CPC664/CPC6128 (Not German CPC6128s!) ===

==== Drive has RDY-signal ====

[[Image:CPC664 - 3.5 w RDY.jpg|frame|none|Schematics for PC disk drives with own READY signal on an Amstrad/Schneider CPC664/CPC6128 (Non-German CPC6128 only)]]

==== Drive doesn't have RDY-signal ====

[[Image:CPC664 - 3.5 wo RDY.jpg|frame|none|Schematics for PC disk drives without own READY signal on an Amstrad/Schneider CPC664/CPC6128 (Non-German CPC6128 only)]]

=== Schneider/Amstrad CPC6128 (German models and grey imports from Germany only!) ===

==== Drive has RDY-signal ====

[[Image:CPC6128 - 3.5 w RDY.jpg|frame|none|Schematics for PC disk drives with own READY signal on a Schneider CPC6128 or a German Amstrad CPC6128]]

==== Drive doesn't have RDY-signal ====

[[Image:CPC6128 - 3.5 wo RDY.jpg|frame|none|Schematics for PC disk drives without own READY signal on a Schneider CPC6128 or a German Amstrad CPC6128]]

=== Amstrad CPC6128plus ===

==== Drive has RDY-signal ====

[[Image:CPC6128plus - 3.5 w RDY.jpg|frame|none|Schematics for PC disk drives with own READY signal on an Amstrad CPC6128plus]]

==== Drive doesn't have RDY-signal ====

[[Image:CPC6128plus - 3.5 wo RDY.jpg|frame|none|Schematics for PC disk drives without own READY signal on an Amstrad CPC6128plus]]

 

== Garage companies that sold disc drives ==

* [[Frank Strauss Elektronik|Frank Straus 5 1/4" Drive]]
* G+L Electronic (3½" and 5¼" disk drives)

[[Category:Hardware]] [[Category:Peripherals]]

2007-11-04T12:12:15Z

SpaceRat: Talk:3 1/2" & 5 1/4" Disk Drives moved to Talk:3½" & 5¼" Disk Drives: Formal correctness. The easier to type link will still be redirected.

I have removed the misleading comment on the first drawing.
It was listing the signals on the wires, but was using the wrong pin numbers as stated in the manual, rather than those from Shugart standard.
As all paintings are made to match the Shugart standard whereever possible, those signal explanations were rather confusing.
Also, all paintings were made with the thought in mind, that the one making the cable doesn't need to know the signals, but only where to put the red wire to.

3 1/2" & 5 1/4" Disk Drives

2007-04-21T11:57:59Z

SpaceRat: Spam

2007-04-20T15:08:22Z

SpaceRat: /* Notes */

Besides the "big" brands' disk drives for the Amstrad CPC, there were also user solutions and garage company made disk drives for the Amstrad CPC.

These usually came without their own DOS, or you had to replace the built-in AMSDOS with a DOS like ParaDOS or a patched AMSDOS.

But even without a special DOS taking use of the higher capacity of those drives, the use of such drives made sense, as media were much cheaper than 3" media.

Today, with supplies of 3" disks draining and company solutions no longer being produced, a self-made 3 1/2" disk drive is the perfect supplement for every CPC user.

== Notes ==

* Whereever possible, the wire numbers from the PC standard were used! (See the article about the connector for the reason why: [[Connector:2nd disc drive (CPC664, CPC6128, CPC6128+)]]

* The universal solution connects a 3" or 3 1/2" disk drive to any CPC with disk controller
** You can even use Part A for connecting a 3" disk drive to a CPC664/CPC6128/CPC6128plus and Part Bx for connecting a 3 1/2" disk drive to a CPC464 with DDI-1 at the same time
** Part Bx, which is also the full cable for the CPC464 with DDI-1, can even be used to connect the PC drive as A: on the DDI-1, though this doesn't work with all drives.

* Although schematics for drives without own RDY-Signal are given, it is highly recommended to use drives with RDY to ensure maximum compatibility. The only todays drive known to be resolderable to output a RDY-signal is the Samsung SFD-321B and many drives won't work as A: on the CPC464+DDI-1 without a permanent RDY though.

* These schematics differ from most existing schematics on the web in that way, that they don't use GND to pull signals active low, but the /DRIVE SELECT line via diode. This ensures that the other drive on the bus doesn't become influenced. You can solder the wire containing the diode directly (without the diode) to a GND-wire and you will get the same as described in other tutorials but the side switch and - if applicable - the permanent RDY will also be in effect for the other disk drive then.

* Hints for fitting cut/squeeze plugs on flat-ribbon cable (Assuming you were building the cable according to the PC wire numbers with red wire = wire 1), connectors seen from back:
** Amstrad CPC664/CPC6128: Red wire showing away from orientation nose inside the connector
** Schneider CPC6128 (DE): Red wire showing to the right with two free pins on the right end of the connector
** Amstrad CPC6128plus: Red wire showing to the right with three unused pins on the left end of the connector (red wire not connected/overlapping end of connector)

== Schematics ==

=== Universal solution (CPC464+DDI-1, CPC664, CPC6128, CPC6128 German and CPC6128plus) ===

==== Part A: Replacement cable for original Amstrad/Schneider FD-1 ====

[[Image:Universal FD-1.jpg|frame|none|Identical to the cable for the FD-1 except that it is for the CPC664, CPC6128 and CPC6128plus at the same time]]

==== Part B1: Makes a PC disk drive with RDY behave like a DDI-1 ====

[[Image:DDI-1 - 3.5 w RDY.jpg|frame|none|Makes a PC disk drive with RDY behave like a DDI-1]]

==== Part B2: Makes a PC disk drive without RDY behave like a DDI-1 ====

[[Image:DDI-1 - 3.5 wo RDY.jpg|frame|none|Makes a PC disk drive without RDY behave like a DDI-1]]

=== Amstrad/Schneider CPC464 with DDI-1 ===

See Part B1 or Part B2 as shown in sections 2.1.2 or 2.1.3 accordingly.

=== Amstrad/Schneider CPC664/CPC6128 (Not German CPC6128s!) ===

==== Drive has RDY-signal ====

[[Image:CPC664 - 3.5 w RDY.jpg|frame|none|Schematics for PC disk drives with own READY signal on an Amstrad/Schneider CPC664/CPC6128 (Non-German CPC6128 only)]]

==== Drive doesn't have RDY-signal ====

[[Image:CPC664 - 3.5 wo RDY.jpg|frame|none|Schematics for PC disk drives without own READY signal on an Amstrad/Schneider CPC664/CPC6128 (Non-German CPC6128 only)]]

=== Schneider/Amstrad CPC6128 (German models and grey imports from Germany only!) ===

==== Drive has RDY-signal ====

[[Image:CPC6128 - 3.5 w RDY.jpg|frame|none|Schematics for PC disk drives with own READY signal on a Schneider CPC6128 or a German Amstrad CPC6128]]

==== Drive doesn't have RDY-signal ====

[[Image:CPC6128 - 3.5 wo RDY.jpg|frame|none|Schematics for PC disk drives without own READY signal on a Schneider CPC6128 or a German Amstrad CPC6128]]

=== Amstrad CPC6128plus ===

==== Drive has RDY-signal ====

[[Image:CPC6128plus - 3.5 w RDY.jpg|frame|none|Schematics for PC disk drives with own READY signal on an Amstrad CPC6128plus]]

==== Drive doesn't have RDY-signal ====

[[Image:CPC6128plus - 3.5 wo RDY.jpg|frame|none|Schematics for PC disk drives without own READY signal on an Amstrad CPC6128plus]]

== Garage companies that sold disc drives ==

* [[Frank Strauss Elektronik|Frank Straus 5 1/4" Drive]]
* G+L Electronic (3 1/2" and 5 1/4" disk drives)

[[Category:Hardware]] [[Category:Peripherals]]

2007-04-20T14:26:56Z

SpaceRat:

The following table lists the signal on the "2nd Disk Drive" connector on the back of the CPC664/CPC6128/6128plus. 
Signal names in simple brackets show the meaning the signal has today.
For your convenience, the pin no. are given as specified in the Shugart standard first, followed by the pin no. as assigned by Amstrad and shown in the manual.

Warning!
Multiple Amstrad/Schneider peculiarities have to be kept in mind:
* The numbering on the CPC664/non-German CPC6128 is exactly the opposite of that in the Shugart standard
* The Schneider CPC6128 manual is a 1:1 copy of the Amstrad CPC6128 manual, although the Centronics connector would need to be mounted top-down in order for the plug numbering to match the pin numbering as shown in the manual, which it isn't.
Thus, the pin numbers in the manual mismatch not only the Shugart standard, but also the plug. E.g.: Pin 2 on the pin out in the manual and in the table below will be numbered 13 on the plug and 33 according to the Shugart standard.
* For a maximum confusion, Amstrad has completely changed the pin out numbering on the 6128plus. Here, the numbers on the connector were rotated in order to match those of the plug, but still they do not match the Shugart standard: Pin 1 on the 6128plus is wire 2 of a Shugart-compatible cable, so that wire 1 cannot be connected at all and all signals are shifted by 1.


<h2>For these reasons it is useful not to use the entirely useless numbers from the CPC manual at all, but only to keep in mind where wire 1 of a proper Shugart cable belongs to!</h2>

{|{{Prettytable|width: 700px; font-size: 2em;}}
|''Pin No. (Shugart)''||''Pin No. (CPC)''||''Pin No. (6128plus)''||''Signal Name''||''Description''
|-
|n/a||"35"||n/a||N/C||Schneider CPC6128 only
|-
|1 (red wire¹)||34||none - spare wire^4||GND||Ground
|-
|2||33||1||N/C (/REDWC)||Density Select 1=Low/0=High
|-
|4||31||3||N/C||Reserved
|-
|6||29||5||N/C||Reserved
|-
|8||27||7||/Index||0=Index
|-
|10||25||9||N/C (/MOTEA)||-/- (0=Motor Enable Drive 0)
|-
|12||23||11||/DRVSB||Drive Select 1
|-
|14||21||13||N/C (/DRVSA)||-/-(Drive Select 0)
|-
|16||19||15||/MOTEB||0=Motor Enable Drive 1
|-
|18||17||17||/DIR||0=Direction Select
|-
|20||15||19||/Step||0=Head Step
|-
|22||13||21||/WDATE||Write Data
|-
|24||11||23||/WGATE||Floppy Write Enable, 0=Write Gate
|-
|26||9||25||/TRK00||0=Track 00
|-
|28||7||27||/WPT||0=Write Protect
|-
|30||5||29||/RDATA||Read Data
|-
|32||3||31||/SIDE1||0=Side 1 Select
|-
|34||1 (blue wire²)||33||/RDY (/DSKCHG)||0=Ready (1=Disk Change/0=Ready³)
|-
|n/a||n/a||35||N/C||Amstrad 6128plus only
|-
|All others (odd)||All others (even)||All others (even)||GND||Ground
|}

¹: Assuming you are using a cable which is made to match the Shugart standard on the floppy side. 
²: Original cables from Amstrad/Schneider had blue wires to mark pin 1 (which is pin 34 in Shugart standard). 
³: Although it might look like it, /RDY and /DSKCHG are not compatible. The CPC expects the drive to become ready (=0) by itself, while the DSKCHG signal stays high until confirmation through the PC, so the drive will never become RDY.
^4: Due to the first signal being on pin 1, there is no pin left for the first wire of the floppy cable (usually red). You can just cut it off, it's just another GND.

Except for the hint in note 3, a PC floppy can be directly operated on this connector, as long as you keep attention to the fact that the red wire of a PC floppy cable which is unchanged on the floppy side belongs on pin 34 of the CPC connector.
Some drives can be jumpered to output the desired /RDY signal, some can at least be soldered. Others can be operated by "tuning" the cable.
See [[3 1/2" & 5 1/4" Disk Drives]] for more detailed instructions, incl. Side Switch.

Connector:2nd disc drive (CPC664, CPC6128, CPC6128+)

2007-04-20T14:11:51Z

SpaceRat:

Connector:2nd disc drive (CPC664, CPC6128, CPC6128+)

2007-04-20T14:09:46Z

SpaceRat:

Connector:2nd disc drive (CPC664, CPC6128, CPC6128+)

2007-04-20T14:08:47Z

SpaceRat: