26-3022 - Revision history

Farna: /* Controller */ added 3029 HD mod info

2013-12-23T16:10:11Z

Controller: added 3029 HD mod info

← Older revision		Revision as of 12:10, 23 December 2013
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	The controller is based on the Western Digital WD1793. It features an analog data seperator circuit, infamous for its inherent unreliability and has multiple potentiometers which are used to calibrate various delay and timing features of the disk-side interface. It requires a +12 volt DC supply to operate, and is thus not compatible with a CoCo 2 or 3 unless a Multi-Pak Interface (or other source of +12V) is used or the CoCo or controller are "hacked", also contains the Disk BASIC ROM chip, and the necessary interface logic.		The controller is based on the Western Digital WD1793. It features an analog data seperator circuit, infamous for its inherent unreliability and has multiple potentiometers which are used to calibrate various delay and timing features of the disk-side interface. It requires a +12 volt DC supply to operate, and is thus not compatible with a CoCo 2 or 3 unless a Multi-Pak Interface (or other source of +12V) is used or the CoCo or controller are "hacked", also contains the Disk BASIC ROM chip, and the necessary interface logic.

	The 26-3022 controller is the only one capable of being modified (though with considerable difficulty) to allow use with high-density 3.5" floppy drives.		The 26-3022 controller was though to be the only one capable of being modified (though with considerable difficulty) to allow use with high-density 3.5" floppy drives. Early 26-3029 controllers had a Fujitsu MB8877A (5-volt only equivalent of the WD1793) and are also capable of HD drive operation. Mike Pepe has a page showing how he upgraded a 26-3029 controller: [http://www.doki-doki.net/~lamune/computers/coco/hd-floppy/]

	All subsequent controllers use the WD1773 controller chip, do not use the unreliable analog data separator, do not require +12V (so they will work with any CoCo model), and are capable of double-density operation only.		All subsequent controllers use the WD1773 controller chip, do not use the unreliable analog data separator, do not require +12V (so they will work with any CoCo model), and are capable of double-density operation only.

Farna: /* Controler */

2013-12-23T16:08:05Z

Controler

← Older revision		Revision as of 12:08, 23 December 2013
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	{{NavHardware}}		{{NavHardware}}
	==~~Controler~~==		==Controller==
	the 26-3022 Mini-Disk System was the first production release of a disk controller/drive for use with the original Color Computer.		the 26-3022 Mini-Disk System was the first production release of a disk controller/drive for use with the original Color Computer.

Luis46coco at 06:57, 10 September 2012

2012-09-10T06:57:16Z

← Older revision		Revision as of 02:57, 10 September 2012
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	The disk drive is a TEC (Tokyo Electric Corp.) (or Texas Peripherals?) drive mechanism unit encased in a gray-silver-colored enclosure, matching the exterior of the original CoCo (and other early TRS-80 machines and peripherals). The drive unit stands vertically, making it taller than it is wide, with a simple linear power supply and a 5.25" full-height, single-sided (in most cases), double-density, half-height (in most cases) floppy drive. The drive is capable of accessing about 37 tracks, so a 35 track limit was imposed in Disk BASIC. This resulted in a capacity of approximately 160 kilobytes per disk.		The disk drive is a TEC (Tokyo Electric Corp.) (or Texas Peripherals?) drive mechanism unit encased in a gray-silver-colored enclosure, matching the exterior of the original CoCo (and other early TRS-80 machines and peripherals). The drive unit stands vertically, making it taller than it is wide, with a simple linear power supply and a 5.25" full-height, single-sided (in most cases), double-density, half-height (in most cases) floppy drive. The drive is capable of accessing about 37 tracks, so a 35 track limit was imposed in Disk BASIC. This resulted in a capacity of approximately 160 kilobytes per disk.

	The drive unit has an AC power, power switch, ~~Fuse~~ and power cord ~~And~~ in the front an activity LED.		The drive unit has an AC power, power switch, fuse and power cord and in the front an activity LED.

	A captive (in most cases) ribbon cable exits the drive unit, terminated in a 34-pin card-edge connector which attaches to the controller pak.		A captive (in most cases) ribbon cable exits the drive unit, terminated in a 34-pin card-edge connector which attaches to the controller pak.

Luis46coco at 06:51, 10 September 2012

2012-09-10T06:51:57Z

← Older revision		Revision as of 02:51, 10 September 2012
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	{{NavHardware}}		{{NavHardware}}
			==Controler==
	the 26-3022 Mini-Disk System was the first production release of a disk controller/drive for use with the original Color Computer.		the 26-3022 Mini-Disk System was the first production release of a disk controller/drive for use with the original Color Computer.

Luis46coco at 06:51, 10 September 2012

2012-09-10T06:51:25Z

← Older revision		Revision as of 02:51, 10 September 2012
Line 4:		Line 4:
	The controller is based on the Western Digital WD1793. It features an analog data seperator circuit, infamous for its inherent unreliability and has multiple potentiometers which are used to calibrate various delay and timing features of the disk-side interface. It requires a +12 volt DC supply to operate, and is thus not compatible with a CoCo 2 or 3 unless a Multi-Pak Interface (or other source of +12V) is used or the CoCo or controller are "hacked", also contains the Disk BASIC ROM chip, and the necessary interface logic.		The controller is based on the Western Digital WD1793. It features an analog data seperator circuit, infamous for its inherent unreliability and has multiple potentiometers which are used to calibrate various delay and timing features of the disk-side interface. It requires a +12 volt DC supply to operate, and is thus not compatible with a CoCo 2 or 3 unless a Multi-Pak Interface (or other source of +12V) is used or the CoCo or controller are "hacked", also contains the Disk BASIC ROM chip, and the necessary interface logic.

	The disk drive is a Texas Peripherals unit encased in a silver-colored enclosure with a simple linear power supply and a 5.25" single-sided (in most cases), double-density, half-height (in most cases) floppy drive. A captive (in most cases) ribbon cable exits the drive unit, terminated in a 34-pin card-edge connector which attaches to the controller pak. The drive unit also has an AC power, power swich and power cord. Even though the drives and controllers were sold as packages, they can be interchanged almost universally. The drive is capable of accessing about 37 tracks, so a 35 track limit was imposed in Disk BASIC.		The 26-3022 controller is the only one capable of being modified (though with considerable difficulty) to allow use with high-density 3.5" floppy drives.

			All subsequent controllers use the WD1773 controller chip, do not use the unreliable analog data separator, do not require +12V (so they will work with any CoCo model), and are capable of double-density operation only.

			==Drive==
			The disk drive is a TEC (Tokyo Electric Corp.) (or Texas Peripherals?) drive mechanism unit encased in a gray-silver-colored enclosure, matching the exterior of the original CoCo (and other early TRS-80 machines and peripherals). The drive unit stands vertically, making it taller than it is wide, with a simple linear power supply and a 5.25" full-height, single-sided (in most cases), double-density, half-height (in most cases) floppy drive. The drive is capable of accessing about 37 tracks, so a 35 track limit was imposed in Disk BASIC. This resulted in a capacity of approximately 160 kilobytes per disk.

	~~These drives are not the most robust~~, and ~~many that are out there are probably~~ in ~~need of work~~. ~~(if they work at all)~~		The drive unit has an AC power, power switch, Fuse and power cord And in the front an activity LED.

	~~The 26-3022 controller is the only one capable of being modified~~ (~~though with considerable difficulty~~) to ~~allow use with high-density 3.5" floppy drives~~.		A captive (in most cases) ribbon cable exits the drive unit, terminated in a 34-pin card-edge connector which attaches to the controller pak.

	~~All subsequent~~ controllers ~~use the WD1773 controller chip~~, ~~do not use the unreliable analog data separator, do not require +12V (so~~ they ~~will work with any CoCo model), and are capable of double-density operation only~~.		Even though the drives and controllers were sold as packages, they can be interchanged almost universally.

			These drives are not the most robust, and many that are out there are probably in need of work. (if they work at all)

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

Luis46coco at 05:32, 10 September 2012

2012-09-10T05:32:25Z

← Older revision		Revision as of 01:32, 10 September 2012
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	{{NavHardware}}		{{NavHardware}}
	the 26-3022 Mini-Disk System was the first production release of a disk controller/drive for the Color Computer.		the 26-3022 Mini-Disk System was the first production release of a disk controller/drive for use with the original Color Computer.

	The controller is based on the WD1793. It features an analog data seperator ~~section~~, and has multiple potentiometers which are used to calibrate various delay and timing features of the disk-side interface. It requires a 12 volt supply to operate, and is thus not compatible with a CoCo 2 or 3 unless a Multi-Pak Interface is used or the CoCo or controller are "hacked"		The controller is based on the Western Digital WD1793. It features an analog data seperator circuit, infamous for its inherent unreliability and has multiple potentiometers which are used to calibrate various delay and timing features of the disk-side interface. It requires a +12 volt DC supply to operate, and is thus not compatible with a CoCo 2 or 3 unless a Multi-Pak Interface (or other source of +12V) is used or the CoCo or controller are "hacked", also contains the Disk BASIC ROM chip, and the necessary interface logic.

	The disk drive is a Texas Peripherals unit encased in a silver-colored enclosure with a simple linear power supply. The drive is capable of accessing about 37 tracks, so a 35 track limit was imposed in Disk BASIC.		The disk drive is a Texas Peripherals unit encased in a silver-colored enclosure with a simple linear power supply and a 5.25" single-sided (in most cases), double-density, half-height (in most cases) floppy drive. A captive (in most cases) ribbon cable exits the drive unit, terminated in a 34-pin card-edge connector which attaches to the controller pak. The drive unit also has an AC power, power swich and power cord. Even though the drives and controllers were sold as packages, they can be interchanged almost universally. The drive is capable of accessing about 37 tracks, so a 35 track limit was imposed in Disk BASIC.

	These drives are not the most robust, and many that are out there are probably in need of work. (if they work at all)		These drives are not the most robust, and many that are out there are probably in need of work. (if they work at all)

	The 26-3022 controller is ~~relatively easily~~ modified to ~~support~~ high-density ~~disk~~ drives.		The 26-3022 controller is the only one capable of being modified (though with considerable difficulty) to allow use with high-density 3.5" floppy drives.

			All subsequent controllers use the WD1773 controller chip, do not use the unreliable analog data separator, do not require +12V (so they will work with any CoCo model), and are capable of double-density operation only.


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

AllenHuffman at 04:56, 7 February 2007

2007-02-07T04:56:39Z

← Older revision		Revision as of 00:56, 7 February 2007
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			{{NavHardware}}
	the 26-3022 Mini-Disk System was the first production release of a disk controller/drive for the Color Computer.		the 26-3022 Mini-Disk System was the first production release of a disk controller/drive for the Color Computer.

Auscoco at 04:52, 18 April 2006

2006-04-18T04:52:24Z

← Older revision		Revision as of 00:52, 18 April 2006
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	The 26-3022 controller is relatively easily modified to support high-density disk drives.		The 26-3022 controller is relatively easily modified to support high-density disk drives.

			[[Category:Hardware]]

Lamune at 00:16, 18 January 2006

2006-01-18T00:16:26Z

New page

the 26-3022 Mini-Disk System was the first production release of a disk controller/drive for the Color Computer.

The controller is based on the WD1793. It features an analog data seperator section, and has multiple potentiometers which are used to calibrate various delay and timing features of the disk-side interface. It requires a 12 volt supply to operate, and is thus not compatible with a CoCo 2 or 3 unless a Multi-Pak Interface is used or the CoCo or controller are "hacked"

The disk drive is a Texas Peripherals unit encased in a silver-colored enclosure with a simple linear power supply. The drive is capable of accessing about 37 tracks, so a 35 track limit was imposed in Disk BASIC.

These drives are not the most robust, and many that are out there are probably in need of work. (if they work at all)

The 26-3022 controller is relatively easily modified to support high-density disk drives.