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(Created page with "A device that presents a USB Mass Storage device as a Direct Access device to a SCSI controller. == Why ? == Because there are many vintage computers out there that require a 50…") |
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* 5V supply via Molex drive connector | * 5V supply via Molex drive connector | ||
* (Check) 3.3v to 5v level converter ? | * (Check) 3.3v to 5v level converter ? | ||
* [http://au.element14.com/texas-instruments/cd74ac280e/logic-parity-gen-chker-9bit-14dip/dp/1753467 TI CD74AC280E] Parity checker/generator. | * [http://au.element14.com/texas-instruments/cd74ac280e/logic-parity-gen-chker-9bit-14dip/dp/1753467 TI CD74AC280E]/74HC280 Parity checker/generator. | ||
== | == Links == | ||
The following projects will be of great help: | The following projects will be of great help: | ||
* [http://micha.freeshell.org/ramdisk/index.php AVR based SCSI RAM disk ] (Open-source AVR microcontroller SCSI interface) | * [http://micha.freeshell.org/ramdisk/index.php AVR based SCSI RAM disk ] (Open-source AVR microcontroller SCSI interface) | ||
* [http://www.fourwalledcubicle.com/LUFA.php LUFA] Open-source AVR microcontroller USB stack. | * [http://www.fourwalledcubicle.com/LUFA.php LUFA] Open-source AVR microcontroller USB stack. | ||
* [http://atari.nvg.org/parity/parity_gen.html SCSI parity generator] | |||
Revision as of 03:17, 28 September 2011
A device that presents a USB Mass Storage device as a Direct Access device to a SCSI controller.
Why ?
Because there are many vintage computers out there that require a 50-pin SCSI drive to boot from. Such disks are only available second-hand, and it's getting harder and harder to find a working disk.
The price of commercial SCSI converters can be much higher than the vintage computers they are used in. However, these devices are still readily available. See :
Why USB ?
Because USB Mass Storage devices already understand SCSI commands.
Parts Required
- SCSI Terminator. TI UC5601DWPG4
- AT90USB1286
- 50 pin IDC header
- USB socket
- 5V supply via Molex drive connector
- (Check) 3.3v to 5v level converter ?
- TI CD74AC280E/74HC280 Parity checker/generator.
Links
The following projects will be of great help:
- AVR based SCSI RAM disk (Open-source AVR microcontroller SCSI interface)
- LUFA Open-source AVR microcontroller USB stack.
- SCSI parity generator
