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Author Topic: Floppy emulator  (Read 60969 times)

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Offline alexh

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Re: Floppy emulator
« on: November 03, 2006, 06:28:04 PM »
I thought that I should mention that I dont think you can sell a Floppy disk emulator without first licensing the technology from 3COM. They own an international patents on it dating back to 1994 that effectively sew up free commercial use of this technology

Here is the US one

http://www.freepatentsonline.com/5473765.html
 

Offline alexh

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Re: CF
« Reply #1 on: March 04, 2007, 01:05:21 PM »
I am looking forward to this project being a success.

I can see it being more of a viable commercial product than most other homebrew hardware.

I appreciate this is a new version, but if you can in the future... make it the same form factor as a floppy drive.

To be able to remove a broken drive and insert one of these in it's place would be ideal.
 

Offline alexh

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Re: CF
« Reply #2 on: January 10, 2008, 12:14:17 AM »
Quote

monami wrote:
i am probably ignorant but anyway why can't a floppy emulator be done in software? wouldn't that be an easier job?  :roll:

There is already a software floppy disk emulator for the Amiga (kind of) it's called WHDload.

I still feel this device has a commercial potential, especially if made to work with Spectrum's and C64 etc. and whatever other Retro computers dont have a WHDload.

It could even be extended to be a TAPE emulator in the form of a compressesed sample player.

 

Offline alexh

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Re: Update
« Reply #3 on: February 22, 2008, 12:57:02 PM »
I still feel there is a commercial opportunity here.

If the board was made so that it was the same size as a floppy disk drive, with the screw holes in the right places so that it could fit internally, with the controller button in the same place as the eject button it would be great.
 

Offline alexh

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Re: Update
« Reply #4 on: February 22, 2008, 02:37:30 PM »
Quote

tnt23 wrote:
Fitting the current version of PCB instead of original disk drive could be slightly unusable on big Amigas. Currently it has its controls - LCD and buttons - soldered on the same PCB

I am not a particular fan of the LCD & Multiple buttons idea. Yes it makes it platform independent, but it adds significantly to the overall cost and as you say it makes it difficult to replace "any"[/i] 3.5" floppy drive.

After all you have a powerful computer and a TV, why do you need an LCD?

I prefer the idea of only one button (which would be in the position of the Eject) and using the host machine to select disk images.

How would you do that?

A default boot image (selected on power-up or if the eject is held down for 2 seconds).

The boot image is part binary file, and part interaction with the controller.

The binary file provides the preliminary boot media and the menu system. The controller provides the flash card file listings and a way of selecting a disk image by writing data (back to the controller).

Of course you would need a different "default image" for each target platform, but I am sure they could be knocked together with partners from each scene in 5-10 mins.

Especially if you open-sourced the API (i.e. which tracks do what etc.)

By keeping multi-disk games in folders on the flash card, you could select between disks by simply pressing the eject button for less than 2 seconds to cycle through.

If we could agree a partnership and an API, then I would arrange to get the default boot image (dual-format) coded for the Amiga/ST for an experiment?

By getting rid of the LCD and extra buttons (and support code) the floppy emulator can be reduced in complexity and mass produced for a low price. (And/Or for a high profit ;-))
 

Offline alexh

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Re: Update
« Reply #5 on: February 22, 2008, 11:46:50 PM »
Quote

Is the price really a problem? The price difference of an LCD based device and an OSD based device is about 10 euros.

Yes. If we want someone to mass produce them at a price that is inoffensive, and leaves the developer a good margin so they develop something else. Also the LCD's dont have a good MTBF. I know I develop with them.

Quote

The device that you are talking about already exist:

I've seen it, but it doesn't work with RGB output and no-one (outside the US) uses anything else do they?

Quote
But what do you do when you need to plug the emulator on this kind of "computer" ?

True, that is a case where you need the LCD.
 

Offline alexh

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Re:
« Reply #6 on: March 07, 2008, 09:52:43 AM »
Quote

Xenepp wrote:
Wow, this might be the answer Super Magicom owners have been looking for since 1992 :)

Surely SuperMagicom owners use the parallel port interface? I know I did.
 

Offline alexh

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Re: Update
« Reply #7 on: March 07, 2008, 10:06:21 AM »
Quote

alenppc wrote:
3) A question for alexh: you mentioned a "default boot image (dual-format) coded for the Amiga/ST". How can you create a single image that is bootable on both Amiga and the ST?? :-? That doesn't sound right...

Where have you been for the last 18 years?

There were 10's of games with DualFormat disks and 100's of Magazine coverdisks.

Lethal Xcess,
Monster Business,
Starglider 2,
Stunt Car Racer,
Bionic Commando,
3D-Pool,
Carrier Command,
Indiana Jones,
Zero Magazine,
ST-Amiga Format Magazine
"The One For 16-bit games" Magazine
etc. etc.

Rick Dangerous II is Tri-Format supporting Atari-ST, Amiga and PC on one disk!

The technique I *think* was discovered and utilised mainly by "Rob Northen Computing" but it may have been simultaneously developed elsewhere.
 

Offline alexh

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Re: Update
« Reply #8 on: March 07, 2008, 02:32:46 PM »
You are thinking at the data block level. I am not 100% sure but I *think* it is done at the MFM level
 

Offline alexh

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Re: Release of PCB-Layout, schematics and firmware..?
« Reply #9 on: July 10, 2008, 09:56:04 AM »
I think there are 3 projects
 

Offline alexh

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Re: Release of PCB-Layout, schematics and firmware..?
« Reply #10 on: July 11, 2008, 01:55:33 PM »
Get making it then. I've not had a parallel port on any of my last two motherboards. No-one is going to make parallel port designs these days are they?