ST-506 Interface Card

Introduced in 1980 by Seagate Technology (then Shugart Technology), it stored up to 5 megabytes after formatting. The ST-506 and ST-412 (sometimes written ST506 and ST412) were ear...

Guide
Feb 13, 2026

ST506 disk interface

The ST506 interface uses two flat cables, one a 34-pin control cable, and the other a 20-pin data cable. The control cable is shared by up to four disks whereas each disk has got its own dedicated data cable.

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Guide
Mar 08, 2026

ST506 interface | Vintage Computer Federation Forums

The elusive debug commands you speak of are not specifically for the ST506 interface, it was firmware added to 8 bit cards for the old XT generation machines which didn''t have any hard

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Guide
Jul 17, 2025

Changes to the ST-506/ST-412 Interface

The ST-506 physically steps the heads on receipt of each step pulse. Release of the ST-412 Drive Reference 3 indicates that the interface between controller and drive remains the same, and

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Guide
Apr 10, 2026

seagate :: ST506 ServiceMan May82

rise within the enclosure, providing significantly greater off-track margin and the ability to immediately perform read and write operations after power up with no thermal stabilization delay. The ST-506

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Guide
Mar 11, 2026

ST-506/ST-412 explained

In the ST-506 interface, the drive connects to a controller card with two ribbon cables carrying signals, while a third cable provides power. The two signal cables are the wide 34-pin control cable and the

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Guide
Dec 24, 2025

Spirit HDA-506 interface for the Amiga 500/1000

The earliest standard was the ST-506 interface, developed by Shugart Associates in 1980 and rapidly adopted by other manufacturers. The drives

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Guide
Apr 12, 2026

The ST412/506 Interface

The ST-506 design incorporated a very well defined interface between the disk drive and the controller. Introduced about a year later, its successor, the Seagate ST-412 (Seagate, 1991b), had a 10 Mbyte

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Guide
Jul 16, 2025

Amiga Hardware Database

SCSI and ST-506 controller supports seven SCSI and two ST-506 devices at once the SCSI drives are controlled by the WD 33C93 IC the ST-506 drives are controlled by the Zilog Z80B CPU the 33C93

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Guide
Mar 25, 2026

ST506-Schnittstelle – Wikipedia

Die ST506-Schnittstelle ist eine Hardwareschnittstelle. Sie wurde 1980 von der irischen Firma Shugart Technology, heute Seagate, zu ihren neuartigen 5¼″- Festplatten ST506 (5 MB) und ST412 (10 MB)

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Guide
Aug 03, 2025

Seagate ST-506 Manuals | ManualsLib

Seagate ST-506 Pdf User Manuals. View online or download Seagate ST-506 Manual, Product Manual

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Guide
May 13, 2026

ST-506/412

ST-506/412 HDD-Interface - 34-Pin Control Bus Connector(Used for (1983) classic - IBM XT/AT and PS/2 systems)

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Guide
Mar 31, 2026

X-Stream Technologies: Hard Drive Interfaces

The interface used the same type of 20-pin data cable and the 34-pin control cable as the ST-506. ESDI developed on ST-506/ST-412 in many ways. ESDI moved

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Guide
Dec 01, 2025

What Is ST-506 Interface?

The ST-506 interface was a standard hard disk controller (HDC), and the ST-506 interface was used to connect personal computers (PC) and hard disk drives (HDD). It attached to a controller

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Guide
Feb 27, 2026

Hardware-Aktuell

Die ST506-Schnittstelle wurde 1982 von der Firma Seagate für ihre 5¼-Zoll- Festplatten ST506 (5 MB) und ST412 (10 MB) entworfen und galt lange Zeit als De-facto-Standard. Sie ist eine

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Guide
May 31, 2026

ST506 to CF or IDE or anything VOGONS

I stumbled across this discussion on a fork of FlashFloppy that interfaces a Gotek (the original 72MHz Cortex-M4) to ST506 via an adapter, which shows that it''s possible with inexpensive

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Guide
Dec 20, 2025

ST-506 controller

This is a list of all ST-506 cards in the wiki. This list also includes composite devices, such as those cards that include a floppy controller or parallel port.

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Guide
Jul 04, 2025

Seagate ST 506/412 OEM Manual

The ST-506/412 electrical interface is similar to Shugart Associates'' SA 1000 family of 8 inch fixed disc drives. ST -506/412 size and mounting are identical to the industry standard minifloppy disc drives,

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Guide
Oct 05, 2025

S100 Computers

The ST-506 was the first 5.25 inch hard disk drive. Introduced in 1980 by Seagate Technology (then Shugart Technology), it stored up to 5 megabytes after

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Guide
Sep 04, 2025

Morley Electronics ST506 Controller Card

When the Archimedes A300 range was launched there were two types of disc interface available; ST506 (or MFM) which was expensive but slow and SCSI which was very expensive but fast.

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Guide
Oct 14, 2025

ST-506/ST-412

ST-506/ST-412 The ST-506 and ST-412 (sometimes written ST506 and ST412) were early hard disk drive products introduced by Seagate in 1980 and 1981 respectively, that later became construed

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Guide
Jun 09, 2026

What is ST-506 interface? | Lessonstop

ST-506 is an old standard interface for connecting hard disk drives to PCs. Newer standards support faster data transfer rates.

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Guide
Oct 26, 2025

Hard Disk Drives/ Seagate // retrocmp / retro computing

Shugart was responsible for the genesis of the two hard drive interfaces that were to dominate the PC world for decades, SCSI and ST-506/412. In 1980 Shugart produced the world''s first 5.25 inch hard

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