Difference between revisions of "Vortex Disc Drives"

Revision as of 13:59, 25 May 2022

A series of 3.5" and 5.25" floppy disc drives from Vortex providing up to 720K capacity (704K available).

S- and D-Drives (720K/disk)

These are the first generation of floppy disc drives from Vortex. They came in variants having either a single ("S" variant) or two ("D" variant) 80-track drives (BASF 6138). Additionally, a 3" FD-1 can be connected as third drive, ie. unlike most other CPC disk interfaces it supports more than 2 drives. With VDOS only two drives are accessible at one time. The drives interfacing with their own FDC can be used with the CPC 6128 to use different I/O ports (see below).

Variants

• F1 - S Single 5.25" drive with power supply connected via ribbon cable to interface with NEC765 and VDOS 1.0 or 2.11
• F1 - D Double 5.25" drive with power supply connected via ribbon cable to interface with NEC765 and VDOS 1.0 or 2.11
• M1 - S Single 3.5" drive with power supply connected via ribbon cable to interface with NEC765 and VDOS 1.0 or 2.11
• M1 - D Double 3.5" drive with power supply connected via ribbon cable to interface with NEC765 and VDOS 1.0 or 2.11

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  Vortex F1-D with CPC 6128 Interface

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  An anonymous box housing the controller board

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  Look inside the controller, a NEC 765 chip and VDOS upgraded to v2.0

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  Controller with mounted VDOS chip

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  F1-D Interface (CPC 664)

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  F1-D Interface Board (CPC 664)

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  F1-D Interface Board (CPC 664)

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  F1-D Interface Board (CPC 6128)

Second drive upgrade

Allows to upgrade a single -S drive to a dual -D drive.

FD-1 drive adapter

The Vortex S- and D-drives were originally intended as upgrades to CPC 464 setups already having a DDI-1/FD-1. This adapter allowed to continue using the 3" drive. Since only two drives can be used simultaneously, the drive had to be selected manually using a RSX command.

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  Adapter to connect an additional 3" disc drive in between a CPC 464 and a F1-D

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  Inside the adapter box

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  Inside the adapter box (closeup)

Z-Drives (180K/side)

These are basic and less expensive low-capacity drives and were meant to be directly connected to a CPC 664/6128 or CPC 464 with DDI-1 (ie. on computers that already provide a floppy controller). Since these drives do not ship with a special controller, they do rely fully on AMSDOS and thus only 40 tracks can be accessed.

Variants

• F1 - Z Single 5.25" drive with power supply with ribbon cable (does not come with interface containing FDC or VDOS)
• M1 - Z Single 3.5" drive with power supply with ribbon cable (does not come with interface containing FDC or VDOS)

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  Vortex F1-Z

X-Drives (720K/disk)

These are the latest drives from Vortex for use on CPC 664/6128 or CPC 464 with DDI-1 (ie. on computers that already have a FDC). Only single-drive variants were available. The |S command (for accessing a third drive) is no longer used, the new |X command allows to swap drive A and B (same as X-DDOS from Dobbertin). These drives are well designed and strong. They are housed in a metal case with power supply (which has good protection with fuses) and have good quality drive mechanisms. The drive has jumpers on it that can be configured as needed.

X-Modul (RS-232 Interface)

The "X-Modul" adds a RS-232 interface to -X drives.

Variants

• F1 - X Single 80 track, Double Sided, 5.25" drive with power supply and ribbon cable which connects to interface containing VDOS 2.0
• M1 - X Single 80 Track, Double Sided, 3.5" drive with power supply and ribbon cable which connects to interface containing VDOS 2.0
• F1 - XRS same as F1-X, upgraded with RS232 interface
• M1 - XRS same as M1-X, upgraded with RS232 interface

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  Vortex F1-X with Manual and Driver Disk

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  Vortex F1-X Backside

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  Front of Vortex M1-X

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  Underneath the Vortex M1-X

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  Inside the Vortex M1-X showing the drive and power

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  Back of Vortex M1-X showing connectors and power.

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  Back of Vortex M1-X showing IDC connection

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  Inside Vortex M1-X with a close up of the drive from above

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  Inside Vortex M1-X with a close up of the back of the drive

Technical Details

Vortex Disk Format

See VDOS

I/O Ports

Standard addresses (same as used by AMSDOS)

FB7Eh 765 FDC (internal) Status Register (R) FB7Fh 765 FDC (internal) Data Register (R/W) FA7Eh Floppy Motor On/Off Flipflop

Special addresses (secondary FDC)

The special addresses are mentioned in the manual for the Vortex -X drives, but apparently they are referring to other/older Vortex drives, not the -X drives. The special addresses are used only on CPC 664/6128 and only if the Vortex drive includes an FDC chip.

FBF6h 765 FDC (Vortex,ext) Status Register (Read) FBF7h 765 FDC (Vortex,ext) Data Register (R/W) FA7Eh Floppy Motor On/Off Flipflop (nearly same as normal, bit precise)

The X drive has a different PCB than the PCB for the S, the manual describes connecting the DDI-1 interface to the X drive interface and a 'decoder-ROM' which defines the I/O decoding?

• Note1: The -Z and -X drives do not include FDC chips.
• Note2: The -S and -D drives do reportedly work only on CPC 464 (?).

So, not sure if/when the Special addresses are used at all?

RS232 Ports (for -X drives with RS232)

FADC/FADD=Serial Data/Control FBDC/FBDD/FBDF=Counter 0/1/Mode.

So it's probably compatible with Amstrad/Pace (and probably also including, but not using, channel B ports FADE/FADF and FBDE).

Manuals

• Vortex Floppy Disk Station F1 für den Schneider CPC 464 - Benutzerhandbuch (Manual for old drives with VDOS 1.0)
• 3-Zoll-Adapter zur VORTEX-Diskettenstation (Manual for Vortex adapter for connecting a 3 inch floppy drive to the Vortex Disk Station F1 controller)
• Vortex X-Laufwerke (Manual for new X-drives with VDOS 2.0)
• Vortex VDOS 2.0 (Manual for upgrading from VDOS 1.0 to VDOS 2.0)
• Manual de las Unidades Vortex (pdf)
• Vortex RS232-C Manual (pdf)
• NEC drive inside Vortex M1-X NEC drive inside Vortex M1-X