Amiga 500 68K Accelerator - DIY - Page 5

patrik · 21 August 2018, 12:18

Quote:

Originally Posted by plasmab

Almost all cards for the A500 behave like this.

We had a huge discussion about this on my channel and that’s when I realised 24 bit autoconfig wasn’t going to let people use my cards and older add-on hardware at the same time.

It’s why I have completely dismissed 24 bit type chips in my project.

I guess all designs based on a proper Zorro2 solution like the GVP HD+8, C= A590, IVS Trumpcard/Grandslam etc should behave correctly?

PR77 · 21 August 2018, 12:50

Quote:

Originally Posted by patrik

I guess all designs based on a proper Zorro2 solution like the GVP HD+8, C= A590, IVS Trumpcard/Grandslam etc should behave correctly?

I would love to test other devices but only have the Alfa Data (BSC) HD + RAM device.

plasmab · 21 August 2018, 13:29

Some do it right but even my latest TF530 firmwares doesn’t ... I decided it was better to use the space for SPI rather than a comparison that is always the same value.

plasmab · 21 August 2018, 20:18

BTW I noticed a bug in your IDECS code..

assign IDE_CS[1:0] = ADDRESS[13:12];

Is wrong. They should never both be low. The correct code is..

assign IDECS = A[12] ? {~IDERANGE, 1'b1} : {1'b1, ~IDERANGE};

PR77 · 21 August 2018, 20:47

Quote:

Originally Posted by plasmab

BTW I noticed a bug in your IDECS code..

assign IDE_CS[1:0] = ADDRESS[13:12];

Is wrong. They should never both be low. The correct code is..

assign IDECS = A[12] ? {~IDERANGE, 1'b1} : {1'b1, ~IDERANGE};

You're right! Thanks! I haven't had problems with it but I guess that was just down to chance.

MrPix · 15 March 2019, 17:15

Hi PR77.

I've been following your updates with interest.

I'd be interested in joining with you by offering to design, build and test a compliant PCB design that would likely pass EMI testing.

Does this interest you?

PR77 · 16 March 2019, 20:50

Quote:

Originally Posted by MrPix

Hi PR77.

I've been following your updates with interest.

I'd be interested in joining with you by offering to design, build and test a compliant PCB design that would likely pass EMI testing.

Does this interest you?

Thanks for the offer... The design is in Github (PR77) so feel free to grab a copy and post a design, I'm very interested to see how others bring their flair to the design.

While you're at it, perhaps you can also have a crack the layout for the Kickstart Relocator (http://eab.abime.net/showthread.php?t=94108). Zero is also giving it a crack (http://eab.abime.net/showpost.php?p=...5&postcount=24).

Methanoid · 12 August 2019, 13:13

Really interesting project.

Some (dumb) questions:

Have you planned the direction/location/orientation of any IDE-CF adapter to make sure it doesn't get too tall or clash with RF shields etc?

Will this also be an Atari ST accelerator or Amiga only?

PR77 · 13 August 2019, 11:44

Quote:

Originally Posted by Methanoid

Really interesting project.

Some (dumb) questions:

Have you planned the direction/location/orientation of any IDE-CF adapter to make sure it doesn't get too tall or clash with RF shields etc?

Will this also be an Atari ST accelerator or Amiga only?

Thanks. I never really planned for the accelerator to be used with an RF Shield because I use it with a relocator (I have designed one with Flash ROMS [https://github.com/PR77/68000_Reloca...ASH_Kickstart]). With this the IDE Interface is suitably placed for my purpose.

I have a bunch of design changes pending for a new PCB layout and moving the IDE is something I would like to do; I just haven't had the need at the moment.

As for Atari support, I don't have one so I have no idea. Autoconfig definitely wont work, but as for the rest, I can only speculate that it _might_ work.

seb132 · 20 July 2023, 08:23

@PR77 : any news about this lovely little project?
I have had the A600 version built by a friend (totally happy with it) and I hope the A500 version could be used to make an A1000 one too...

PR77 · 23 July 2023, 09:32

Hi there, to be honest I haven’t worked on this for some time. Too busy with life

. Ive been trying really hard to motivate myself to get back into it. I have an 020 version which is about 70% complete but just can’t get the time to finalise the PCB layout.

Which A600 version are you referring to? This one;

https://github.com/PR77/A600_ACCEL_RAM

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
DIY PS/2 keyboard to Amiga 500?	Solo761	Hardware mods	39	10 December 2020 11:25
HC508 Amiga 500 accelerator card	Lord Aga	support.Hardware	61	02 July 2018 14:06
Viper 530 accelerator for Amiga 500	tbtorro	MarketPlace	16	11 January 2017 00:10
where can i get an amiga 500 accelerator from?	ed777	support.Hardware	4	16 September 2016 20:54
E-Matrix/Viper 530 for Amiga 500 - the best accelerator yet	tbtorro	MarketPlace	0	30 March 2016 21:40

21 August 2018, 13:29	#83
plasmab Banned Join Date: Sep 2016 Location: UK Posts: 2,917	Some do it right but even my latest TF530 firmwares doesn’t ... I decided it was better to use the space for SPI rather than a comparison that is always the same value.

21 August 2018, 20:18	#84
plasmab Banned Join Date: Sep 2016 Location: UK Posts: 2,917	BTW I noticed a bug in your IDECS code.. assign IDE_CS[1:0] = ADDRESS[13:12]; Is wrong. They should never both be low. The correct code is.. assign IDECS = A[12] ? {~IDERANGE, 1'b1} : {1'b1, ~IDERANGE};

15 March 2019, 17:15	#86
MrPix Registered User Join Date: Mar 2019 Location: Austin, TX, USA Posts: 1	Hi PR77. I've been following your updates with interest. I'd be interested in joining with you by offering to design, build and test a compliant PCB design that would likely pass EMI testing. Does this interest you?

12 August 2019, 13:13	#88
Methanoid Retired Quartex Sysop Join Date: Sep 2001 Location: Roman Verulamium Age: 58 Posts: 1,874	Really interesting project. Some (dumb) questions: Have you planned the direction/location/orientation of any IDE-CF adapter to make sure it doesn't get too tall or clash with RF shields etc? Will this also be an Atari ST accelerator or Amiga only?

20 July 2023, 08:23	#90
seb132 French in Australia Join Date: May 2012 Location: Gold Coast Age: 53 Posts: 507	@PR77 : any news about this lovely little project? I have had the A600 version built by a friend (totally happy with it) and I hope the A500 version could be used to make an A1000 one too...

23 July 2023, 09:32	#91
PR77 Registered User Join Date: Oct 2017 Location: Germany Posts: 193	Hi there, to be honest I haven’t worked on this for some time. Too busy with life . Ive been trying really hard to motivate myself to get back into it. I have an 020 version which is about 70% complete but just can’t get the time to finalise the PCB layout. Which A600 version are you referring to? This one; https://github.com/PR77/A600_ACCEL_RAM

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)