Difference between revisions of "Amstrad External Disk Drive"
Cpcmaniaco (Talk | contribs) (→Covers) |
(→Technical Details) |
||
(26 intermediate revisions by 8 users not shown) | |||
Line 1: | Line 1: | ||
− | '''Amstrad''' made two different disk drives for the Amstrad/Schneider CPC range: | + | '''Amstrad''' made two different [[disk drives]] for the Amstrad/Schneider CPC range: |
− | * DDI-1 | + | * 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.<br> This set was for the CPC464 which didn't have a built-in [[765 FDC]] disk controller. |
− | + | * FD-1: a 3" disk drive as secondary disk drive unit for the CPC664, CPC6128, and for the CPC464 with DDI-1 | |
− | + | All drives are for use with [[CF2 Compact Floppy Disc]] 3" discs. | |
− | + | There was no official external disk drive for the 6128Plus or even the 464Plus. 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 used on the 464Plus without modifications (see [[Connecting a Disc Interface to CPC464+]]). | |
− | + | == Technical Details == | |
− | + | 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 (more accurately, soldered) to react on both drive select lines, A: and B:. | |
− | + | ||
− | The disk drives were jumpered ( | + | |
The cable decided which drive became A: and which one became B: : | The cable decided which drive became A: and which one became B: : | ||
− | * On the CPC664 and CPC6128 computers, DRIVE SELECT 0 was not | + | * On the CPC664 and CPC6128 computers, DRIVE SELECT 0 was not connected on the external connector, so the drive could only become drive B: on these systems. |
− | * For the DDI-1, DRIVE SELECT 0 was only wired to the | + | * For the DDI-1, DRIVE SELECT 0 was only wired to the outermost 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 | + | 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 | + | The main reason for 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 wouldn't work without the power fed from the FD-1. |
− | + | Details on [[AMSDOS]], Amstrad's implementation of [[CP/M]] can be found in [[Soft158A:_DDI-1_Firmware_-_The_Complete_CPC_464_DOS_ROM_Specification|DDI-1 Firmware SOFT158A]]. | |
− | + | == Pictures == | |
− | + | ||
− | + | ||
+ | <gallery> | ||
+ | Image:Fd-1.jpg|FD-1 (disc drive) | ||
+ | Image:DDI-1 Tomdalby.jpg|DDI-1 (disc interface) | ||
+ | Image:DDI-1 ISS3 MF0004B.jpg|DDI-1 (pcb) | ||
+ | Image:DDI Schematic.png|DDI-1 (schematic) | ||
+ | Image:Gerald DDI-1 MF0004B.jpg|DDI-1 (top) | ||
+ | Image:Gerald DDI-1 MF0004B-Back with ABBA switch mod.jpg|DDI-1 (bottom) | ||
+ | Image:DDI1_PCB_Top.jpg|MF0004B Models 9,5,3 and 1 PCB (top) | ||
+ | Image:DDI1_PCB_Bottom.jpg|MF0004B Models 9,5,3 and 1 PCB (bottom) | ||
+ | Image:ACU850102 -012.jpg|Advert (ACU Jan 1985) | ||
+ | Image:Amstrad Computer User8504 044.jpg|Advert (ACU Apr 1985) | ||
+ | Image:DDI-1_cable.jpg| DDI-1 cable pinout | ||
+ | Image:DDI-1.jpg|DDI-1 - complete with manual, interface, FD-1 drive & CF-2 discs | ||
</gallery> | </gallery> | ||
Line 50: | Line 59: | ||
* [http://www.cpcwiki.eu/manuals/ddi-1.zip Amstrad DDI-1 (English) Manual] | * [http://www.cpcwiki.eu/manuals/ddi-1.zip Amstrad DDI-1 (English) Manual] | ||
* [http://www.cpcwiki.eu/manuals/DDI-1.es.rar Amstrad DDI-1 (Spanish) Manual] | * [http://www.cpcwiki.eu/manuals/DDI-1.es.rar Amstrad DDI-1 (Spanish) Manual] | ||
+ | * [[Media:DDI-1_Handbuch.pdf]] (German) Manual | ||
== Service Manual == | == Service Manual == | ||
Line 55: | Line 65: | ||
* [http://www.cpcwiki.eu/manuals/DDI-1%20FD-1%20Service%20Manual.en.rar Amstrad DDI-1 FD-1 Service Manual] | * [http://www.cpcwiki.eu/manuals/DDI-1%20FD-1%20Service%20Manual.en.rar Amstrad DDI-1 FD-1 Service Manual] | ||
− | [[ | + | == Datasheets == |
+ | |||
+ | * [[Media:UPD765 Datasheet OCRed.pdf]] - uPD765 disc controller | ||
+ | * [[Media:FDC9229BT Datasheet.pdf]] - FDC9229BT data separator (that usually assists the uPD765 chip) | ||
+ | * [[Media:DDI Schematic.png]] - DDI-1 Schematic (disc interface for CPC464) | ||
+ | |||
+ | [[Category:Peripherals]] [[Category:Manual]][[Category:DATA Storage]][[Category:CPC Internal Components]][[Category:Amstrad Products]] |
Latest revision as of 05:30, 6 May 2018
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 didn't have a built-in 765 FDC disk controller.
- FD-1: a 3" disk drive as secondary disk drive unit for the CPC664, CPC6128, and for the CPC464 with DDI-1
All drives are for use with CF2 Compact Floppy Disc 3" discs.
There was no official external disk drive for the 6128Plus or even the 464Plus. 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 used on the 464Plus without modifications (see Connecting a Disc Interface to CPC464+).
Technical Details
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 (more accurately, soldered) to react on both drive select lines, 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 connected on the external connector, so the drive could only become drive B: on these systems.
- For the DDI-1, DRIVE SELECT 0 was only wired to the outermost 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 reason for 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 wouldn't work without the power fed from the FD-1.
Details on AMSDOS, Amstrad's implementation of CP/M can be found in DDI-1 Firmware SOFT158A.
Pictures
Covers
Manuals
- Amstrad DDI-1 (English) Manual
- Amstrad DDI-1 (Spanish) Manual
- Media:DDI-1_Handbuch.pdf (German) Manual
Service Manual
Datasheets
- Media:UPD765 Datasheet OCRed.pdf - uPD765 disc controller
- Media:FDC9229BT Datasheet.pdf - FDC9229BT data separator (that usually assists the uPD765 chip)
- Media:DDI Schematic.png - DDI-1 Schematic (disc interface for CPC464)