MiniMig with AGA

[ferrellsl]

Sheesh, just get a modern PS2 or USB keyboard with PS2 connector and remap the keys for an Amiga.  Amigans have a way of over complicating the hell out of everything.

[Darrin]

Sheesh, just get a modern PS2 or USB keyboard with PS2 connector and remap the keys for an Amiga.  Amigans have a way of over complicating the hell out of everything.

You're missing the original point.  

I use a PS2 keyboard quite nicely on my Minimig v1.1 (the minimig is actually in the keyboard).

What we're looking at is reusing old A1200 shells that are left over from tower conversions or have dead mobos and giving them a new lease of life as cases for this new Minimig.

Throwing on of these Minimigs into an A1200 case and then snaking a PS2 keyboard out of the side will look a but "funky".  Bastardising the A1200 keyboard to put in a PS2 keyboard seems criminal (but might be the only option).  If I go that route then I'll use a black PS2 keyboard and spray the A1200 plastic casing black to match.

[downix]

You're missing the original point.  

I use a PS2 keyboard quite nicely on my Minimig v1.1 (the minimig is actually in the keyboard).

What we're looking at is reusing old A1200 shells that are left over from tower conversions or have dead mobos and giving them a new lease of life as cases for this new Minimig.

Throwing on of these Minimigs into an A1200 case and then snaking a PS2 keyboard out of the side will look a but "funky".  Bastardising the A1200 keyboard to put in a PS2 keyboard seems criminal (but might be the only option).  If I go that route then I'll use a black PS2 keyboard and spray the A1200 plastic casing black to match.

The A1200's keyboard interface is not a difficult thing to adapt to the Minimig.  If there were a decent market, could make custom minimig boards.  If not, can do an A1200 to PS/2 adaptor.  Either way, piece of cake electronically.  Anyone with 15 minutes could whip up the schematics needed based on the numberous PS2 to Amiga adaptor schematics from Aminet.

[sbeehre]

I know id be keen on a custom Minimig AGA board which i could put into my a1200 case!

[Darrin]

The A1200's keyboard interface is not a difficult thing to adapt to the Minimig.  If there were a decent market, could make custom minimig boards.  If not, can do an A1200 to PS/2 adaptor.  Either way, piece of cake electronically.  Anyone with 15 minutes could whip up the schematics needed based on the numberous PS2 to Amiga adaptor schematics from Aminet.

If you ever get bored then put me down for one (assuming you have a spare 15 minutes).  

Perhaps with more and more Minimigs getting into the hands of Amiga users then a market for these adapters will appear to the point where somebody will consider making them.

[mongo]

The A1200's keyboard interface is not a difficult thing to adapt to the Minimig.  If there were a decent market, could make custom minimig boards.  If not, can do an A1200 to PS/2 adaptor.  Either way, piece of cake electronically.  Anyone with 15 minutes could whip up the schematics needed based on the numberous PS2 to Amiga adaptor schematics from Aminet.

The keyboard controller for the A1200 is not on the keyboard, it is on the motherboard. PS2 to Amiga adaptor schematics won't help you at all.

An A500 keyboard, on the other hand, would be easy to use with a MiniMig.

[kolla]

The projects on aminet are typically about hooking PS2 keyboards to A1200s, not turning A1200 keyboards into PS2 ones. What is needed is something akin to the Keyrah, and IMO it would make perfect sense to put this on the expansion board that Yaqube is making, but I have no idea whether it is feasable or not.

[freqmax]

What are people willing to pay for A1200 keyboard to PS/2 adapter?

[Darrin]

What are people willing to pay for A1200 keyboard to PS/2 adapter?

A Keyrah goes for $41 on AmigaKit.com, so that's a good ballpark for me.

[aperez]

A Keyrah is hideously overpriced. The Custom-looking Motorola MPU which is on the A1200 used a bog-standard Motorola 68HC05 MCU.

See http://www.amiga-stuff.com/hardware/68hc05.html for more info.

[Darrin]

A Keyrah is hideously overpriced. The Custom-looking Motorola MPU which is on the A1200 used a bog-standard Motorola 68HC05 MCU.

See http://www.amiga-stuff.com/hardware/68hc05.html for more info.

Maybe, but the question was "what am I willing to pay".  I was willing to pay $41 for a Keyrah, and I'd be willing to pay $41 for a A1200 keyboard ribbon to PS2 adapter.  Now, what others are willing to pay is another matter.

Amigas are not a cheap hobby.

[aperez]

In this case, the microcontroller in question can be had for £2.08  

See http://uk.farnell.com/freescale-semiconductor/mc68hc705j1acpe/8bit-mcu-68hc705-dip20/dp/1200547 in the UK

These can also be purchase directly from Digikey in the US for $4/ea. See http://parts.digikey.com/1/parts/1081847-ic-mcu-4mhz-1-2k-otp-20-dip-mc68hc705j1acpe.html

Whether or not the contents of the (typically flash EEPROM) could be read back is another matter.

The 68HC05C9A that Commodore employed had a mask ROM area, where their code lived. The closest part number to it is http://www.freescale.com/webapp/sps/site/prod_summary.jsp?code=68HC05C9A

[Darrin]

In this case, the microcontroller in question can be had for £2.08  

See http://uk.farnell.com/freescale-semiconductor/mc68hc705j1acpe/8bit-mcu-68hc705-dip20/dp/1200547 in the UK

These can also be purchase directly from Digikey in the US for $4/ea. See http://parts.digikey.com/1/parts/1081847-ic-mcu-4mhz-1-2k-otp-20-dip-mc68hc705j1acpe.html

Whether or not the contents of the (typically flash EEPROM) could be read back is another matter.

The 68HC05C9A that Commodore employed had a mask ROM area, where their code lived. The closest part number to it is http://www.freescale.com/webapp/sps/site/prod_summary.jsp?code=68HC05C9A

Let me know when you have a finished product.  

[tasmanian guy]

So what sort of speed are we looking for this fpgaarcade Amiga, is it going to be as fast or faster than a 68030 at 50mhz or not? :-)

[wizard66]

So what sort of speed are we looking for this fpgaarcade Amiga, is it going to be as fast or faster than a 68030 at 50mhz or not? :-)

Nope it's not faster then a 030 50Mhz.

The softcore speeds are:

TG68K @ 7.09 MHz : 4.27 x A500 / 1.85 x A1200
TG68K.C @ 7.09 MHz : 5.81 x A500 / 2.52 x A1200

[Darrin]

The projects on aminet are typically about hooking PS2 keyboards to A1200s, not turning A1200 keyboards into PS2 ones. What is needed is something akin to the Keyrah, and IMO it would make perfect sense to put this on the expansion board that Yaqube is making, but I have no idea whether it is feasable or not.

To be honest, I wouldn't add it to the board as some people won't want it and as a stand-alone unit it could also be used with a PC (WinUAE, etc), Minimig v1.x and the C-One.  All of which equals a larger market for sales.