Minimig sources available for download! - Page 2

alexh · 08 August 2007, 10:59

After several conversations with Dennis (the author of MiniMig) several optimisations and cost downs to the v1.0 PCB came up.

1) Fix bug in pin mapping.
2) Add voltage regulation.
3) Use a single 27MHz crystal.
4) Use a larger capacity almost pin compatible FPGA.

Several "would be" hardware engineers came out of the woodwork and promised to take the v1.0 schematics and generate a v1.1 but it was all talk.

Dennis has now (supposedly) agreed to make these schematic changes and rework the layout.

I think it will be several months before we hear again about anyone making MiniMig boards.

Zetr0 · 08 August 2007, 14:44

now.... this little 12cm board has me a little fired... its an awsome project, and I can only applaud Dennis for his time, and dedication to his project.

but I have a question.....

that little 68000 chip... all on its own.... what would happen if you put a clip over accelerator on it ? with extra ram ? say like A620 / 30 or even that 030 from upgrade that Jens built ?

would it work.... I am intrueged....

LOL look at me.... i am trying to mod stuff that hasn`t had a full final release LOL

Zetr0 · 08 August 2007, 14:52

damn... just had another idea...

Dennis's MiniMig uses a PIC controller to load a CORE (this core loads ROMs to a proteced memory and then the rest to the spartan3) so could this CORE be changed..... I was initiall thinking of GoaC (Genesis on a chip) or well maybe SNES ?....

I would also love an AGA version of this... it would be fantastic!

this is just a theoretical query

Anubis · 08 August 2007, 15:22

What happened to the boards?? You said you'll check near your place...

08 August 2007, 15:55

Very interesting, an mini classic Amiga of an expansion PC card size! :-)

Zetr0 · 08 August 2007, 16:17

Quote:

Originally Posted by Anubis

What happened to the boards?? You said you'll check near your place...

Indeed... I am hoping to get some time next week, maybe thursday / friday... it all depends on whom i can talk to and who I need to talk to..

Anubis · 08 August 2007, 16:21

In two weeks?

Just read amiga.org post with 2 week mentioned for shipping from china to the user who will organize board's order.

Zetr0 · 08 August 2007, 16:26

@Anubis

LOL, i bet it was a riot over there!!!! "you too can have a minimig... in just two more weeks LOL".... thats almost enough to give some a belly ache just thinking about it.

Truth be said though I actually contacted Hanzatech (the compay in the town i am in that do a lot of 3rd party PCB production) last week and the person or person (the lady couldn`t be specific) wouldn't be in untill thursday / friday hmmmm says I... well we shall see.... fingers crossed eh?

[edit]

I have already downloaded AND printed out the files and patches from the website.... so we shall see.....

Jope · 08 August 2007, 22:02

Quote:

Originally Posted by Zetr0

Dennis's MiniMig uses a PIC controller to load a CORE (this core loads ROMs to a proteced memory and then the rest to the spartan3) so could this CORE be changed..... I was initiall thinking of GoaC (Genesis on a chip) or well maybe SNES ?....

Yes for the Megadrive/Genesis, but that'd require you to start from nothing with the core, only having a pre-laid out circuit board for you to develop with..

Negatory for the SNES. Not 68k based. Better select another platform to start from or do some hw redesigning.

Quote:

I would also love an AGA version of this... it would be fantastic!

Many others would too, but it ain't gonna fit in the FPGA or be very easy to make.

An easy modification/addition would be an A600/1200 compatible IDE connector (and/or compact flash slot).. Totally doable with only minor modifications.

However everyone seems to want 020+ and AGA and 8MB chip. Not realizable without extensive modifications to everything. :-D

alexh · 08 August 2007, 22:53

Quote:

Originally Posted by Zetr0

I was initiall thinking of GoaC (Genesis on a chip) or well maybe SNES ?....

SNES is too complicated for the FPGA but a Megadrive is feasible.

As is Sinclair Spectrum and other 8-bit systems.

AGA is possibly too big too, and with no 68020 and no RAM it would be pretty crap.

As for IDE etc. that is still possible with no modifications. The IDE interface could be routed through the FPGA and PIC to the MMC card just like the floppy disk.

Zetr0 · 09 August 2007, 01:19

indeed, some thoughts their guys.... but anyone want to hazzard a guess as to what would happen if one used an A600 accelerator (one with memory) on the 68k moto on the board?

Anubis · 09 August 2007, 04:09

That genesis sounds way to good...

spiff · 09 August 2007, 12:07

How compatible is the 1.0 release, any threads about it?

dkovacs · 10 August 2007, 03:05

Wasn't the A1200 supposed to ship with only 1MB of chip ram?

Quote:

Originally Posted by alexh

SNES is too complicated for the FPGA but a Megadrive is feasible.

As is Sinclair Spectrum and other 8-bit systems.

AGA is possibly too big too, and with no 68020 and no RAM it would be pretty crap.

As for IDE etc. that is still possible with no modifications. The IDE interface could be routed through the FPGA and PIC to the MMC card just like the floppy disk.

Graham Humphrey · 10 August 2007, 09:22

Quote:

Originally Posted by dkovacs

Wasn't the A1200 supposed to ship with only 1MB of chip ram?

I'm sure I remember reading somewhere that was initially the idea. But I guess it wouldn't have been an awful lot of use with only 1MB.

Pyromania · 11 August 2007, 03:34

I'll take two of these please

Zetr0 · 11 August 2007, 12:59

so no one wants to hazzard a guess as to what might happen if you used an a600 CPU accelerator on that lonesome 68k moto on the minimig board?

any guesses ?

redblade · 13 August 2007, 04:51

awesome. Finally a portable blue box

. how long will the battery power last for?

alexh · 13 August 2007, 09:02

Quote:

Originally Posted by Zetr0

so no one wants to hazzard a guess as to what might happen if you used an a600 CPU accelerator on that lonesome 68k moto on the minimig board?

any guesses ?

Well it wouldnt fit for a start. They are different packaged CPU's.

Zetr0 · 13 August 2007, 11:24

@Alexh

totaly right, sorry aobut that, I didn`t realise it was an SEC 68k moto... shame...

08 August 2007, 16:26	#28
Zetr0 Ya' like it Retr0? Join Date: Jul 2005 Location: United Kingdom Age: 49 Posts: 9,768	@Anubis LOL, i bet it was a riot over there!!!! "you too can have a minimig... in just two more weeks LOL".... thats almost enough to give some a belly ache just thinking about it. Truth be said though I actually contacted Hanzatech (the compay in the town i am in that do a lot of 3rd party PCB production) last week and the person or person (the lady couldn`t be specific) wouldn't be in untill thursday / friday hmmmm says I... well we shall see.... fingers crossed eh? [edit] I have already downloaded AND printed out the files and patches from the website.... so we shall see..... Last edited by Zetr0; 08 August 2007 at 16:28. Reason: adding stuff

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08 August 2007, 10:59	#21
alexh Thalion Webshrine Join Date: Jan 2004 Location: Oxford Posts: 14,331	After several conversations with Dennis (the author of MiniMig) several optimisations and cost downs to the v1.0 PCB came up. 1) Fix bug in pin mapping. 2) Add voltage regulation. 3) Use a single 27MHz crystal. 4) Use a larger capacity almost pin compatible FPGA. Several "would be" hardware engineers came out of the woodwork and promised to take the v1.0 schematics and generate a v1.1 but it was all talk. Dennis has now (supposedly) agreed to make these schematic changes and rework the layout. I think it will be several months before we hear again about anyone making MiniMig boards.

08 August 2007, 14:44	#22
Zetr0 Ya' like it Retr0? Join Date: Jul 2005 Location: United Kingdom Age: 49 Posts: 9,768	now.... this little 12cm board has me a little fired... its an awsome project, and I can only applaud Dennis for his time, and dedication to his project. but I have a question..... that little 68000 chip... all on its own.... what would happen if you put a clip over accelerator on it ? with extra ram ? say like A620 / 30 or even that 030 from upgrade that Jens built ? would it work.... I am intrueged.... LOL look at me.... i am trying to mod stuff that hasn`t had a full final release LOL

08 August 2007, 14:52	#23
Zetr0 Ya' like it Retr0? Join Date: Jul 2005 Location: United Kingdom Age: 49 Posts: 9,768	damn... just had another idea... Dennis's MiniMig uses a PIC controller to load a CORE (this core loads ROMs to a proteced memory and then the rest to the spartan3) so could this CORE be changed..... I was initiall thinking of GoaC (Genesis on a chip) or well maybe SNES ?.... I would also love an AGA version of this... it would be fantastic! this is just a theoretical query

08 August 2007, 15:22	#24
Anubis Retro Gamer Join Date: Jan 2005 Location: Underworld Age: 51 Posts: 4,058	What happened to the boards?? You said you'll check near your place...

08 August 2007, 15:55	#25
Wonder Boy Posts: n/a	Very interesting, an mini classic Amiga of an expansion PC card size! :-)

08 August 2007, 16:21	#27
Anubis Retro Gamer Join Date: Jan 2005 Location: Underworld Age: 51 Posts: 4,058	In two weeks? Just read amiga.org post with 2 week mentioned for shipping from china to the user who will organize board's order.

09 August 2007, 01:19	#31
Zetr0 Ya' like it Retr0? Join Date: Jul 2005 Location: United Kingdom Age: 49 Posts: 9,768	indeed, some thoughts their guys.... but anyone want to hazzard a guess as to what would happen if one used an A600 accelerator (one with memory) on the 68k moto on the board?

09 August 2007, 04:09	#32
Anubis Retro Gamer Join Date: Jan 2005 Location: Underworld Age: 51 Posts: 4,058	That genesis sounds way to good...

09 August 2007, 12:07	#33
spiff Oh noes! Join Date: Mar 2003 Location: Neverland Posts: 766	How compatible is the 1.0 release, any threads about it?

11 August 2007, 03:34	#36
Pyromania Moderator Join Date: Jan 2002 Location: Chicago, IL Posts: 3,375	I'll take two of these please

11 August 2007, 12:59	#37
Zetr0 Ya' like it Retr0? Join Date: Jul 2005 Location: United Kingdom Age: 49 Posts: 9,768	so no one wants to hazzard a guess as to what might happen if you used an a600 CPU accelerator on that lonesome 68k moto on the minimig board? any guesses ?

13 August 2007, 04:51	#38
redblade Zone Friend Join Date: Mar 2004 Location: Middle Earth Age: 40 Posts: 2,127	awesome. Finally a portable blue box . how long will the battery power last for?

13 August 2007, 11:24	#40
Zetr0 Ya' like it Retr0? Join Date: Jul 2005 Location: United Kingdom Age: 49 Posts: 9,768	@Alexh totaly right, sorry aobut that, I didn`t realise it was an SEC 68k moto... shame...

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