14Mhz Accelerator - Page 2

Kai · 29 June 2019, 20:51

IDE is something i havent figured out quite yet - at least not a way that makes it easily accessible to hobbyists...I mean, i could integrate IDE in a way, but it wouldn't be autobooting...I'd presume it just needs an inline rom, but thats not my forte...

Still, any advice or ideas welcome

Jope · 30 June 2019, 07:32

The popular option for ide implementations these days is the Gayle emulation style IDE. The drivers for this are in ROM since 2.05 (37.300).

patrik · 30 June 2019, 16:17

Another option which is used on the TK 68030 IDE+SRAM card is to implement a oktagon style IDE interface and use that driver.

https://github.com/MHeinrichs/68030t..._IDE-interface

Providing the driver in autoconfig ROM would also make it bootable on 1.3.

Other weak points in the C= scsi.device driver is the MaxTransfer bug and problem with 4GB+ drives which both has caused users and community in general massive headaches through the years. Does anyone know how the oktagon driver fares in these aspects?

Jope · 30 June 2019, 20:54

Quote:

Originally Posted by patrik

Other weak points in the C= scsi.device driver is the MaxTransfer bug and problem with 4GB+ drives which both has caused users and community in general massive headaches through the years. Does anyone know how the oktagon driver fares in these aspects?

Rather well, if you use the oktapussy driver.

http://aminet.net/package/disk/misc/oktapus

Mathesar · 01 July 2019, 20:31

Quote:

Originally Posted by Kai

IDE is something i havent figured out quite yet - at least not a way that makes it easily accessible to hobbyists...I mean, i could integrate IDE in a way, but it wouldn't be autobooting...I'd presume it just needs an inline rom, but thats not my forte...

Still, any advice or ideas welcome

I have a modified/improved design for Mika Leinonen's IDE controller running in my A500.
I improved the IDE interface timing (it's faster now) and fixed some small bugs in the driver (the original driver would hang if it tried to access a non exisiting slave drive). Unfortunately it is not autobooting but it runs quite well and it is very easy to build.

See below schematic and PCB render:

Click image for larger version

Name: A500ide_PCB.jpg
Views: 935
Size: 128.3 KB
ID: 63600

A500ide_PCB.pdf
For a real life pictures see here:
http://eab.abime.net/attachment.php?...3&d=1509650841

E-Penguin · 03 July 2019, 13:09

Nice! I guess it's just plug n' play, no autoconfig to worry about? I've got an A590 on the side expansion that doesn't like sharing.

Kai · 03 July 2019, 14:53

Quote:

Originally Posted by Mathesar

I have a modified/improved design for Mika Leinonen's IDE controller running in my A500.
I improved the IDE interface timing (it's faster now) and fixed some small bugs in the driver (the original driver would hang if it tried to access a non exisiting slave drive). Unfortunately it is not autobooting but it runs quite well and it is very easy to build.

See below schematic and PCB render:
Attachment 63600 Attachment 63601
For a real life pictures see here:
http://eab.abime.net/attachment.php?...3&d=1509650841

What sort of transfer speeds do you get with that?

Mathesar · 04 July 2019, 10:46

Quote:

Originally Posted by E-Penguin

Nice! I guess it's just plug n' play, no autoconfig to worry about? I've got an A590 on the side expansion that doesn't like sharing.

It is a simple device that is set to a fixed I/O address using jumpers.
The driver is hardcoded to that address.
So yeah, shouldn't interfere with autoconfig devices.

Mathesar · 04 July 2019, 10:51

Quote:

Originally Posted by Kai

What sort of transfer speeds do you get with that?

I get about 600kb/sec using an MC68000 (or MC68010) and a 44pin IDE->microSD converter.
On an 68010 it can go even faster if the driver would be optimized.

Click image for larger version

Name: sysspeed_a500ide_transfer_speed.jpg
Views: 399
Size: 147.9 KB
ID: 63638

E-Penguin · 08 July 2019, 10:10

Quote:

Originally Posted by Mathesar

It is a simple device that is set to a fixed I/O address using jumpers.
The driver is hardcoded to that address.
So yeah, shouldn't interfere with autoconfig devices.

Ah, I meant the 14MHz accelerator. I don't think that has drivers at all, right?

hooleydog · 31 July 2019, 23:24

Hi, is this board a 2-layer or 4-layer.. What I mean has he done a 4-layer board..

Kai · 01 August 2019, 21:03

It's a 2-layer board

hooleydog · 02 August 2019, 03:16

Ok.. Now off topic.. Where do you plug in this other board.. The Dram board... No instructions or pictures.... You see I'm gonna order some. Nice design...

hooleydog · 10 August 2019, 16:07

Quote:

Originally Posted by Kai

Here we go - decoupling caps placed better, and better copper fill: https://github.com/kr239/A500-14Mhz-Accelerator

And integrated into the 8MB FastRAM here:

https://github.com/kr239/A500-8MB-FastRAM/tree/v3

I had a very dull weekend...

Hi I can't open your Gerbers.. neither can PCBway...

ERROR: A500_14Mhz_Accelerator-B_Cu.gbr Multiple gbr Board Outline (.GBR) files found in design!

LongLifeA1200 · 11 August 2019, 05:03

Quote:

Originally Posted by Kai

...
It's designed for PLCC 68HC000's, which come in higher speed grades than the DIP-64's, and are more abundant, run cooler and are just plain smaller.
...

Great idea.
Supposedly the 68SEC000 is still in production. Gives me hope.

katarakt · 11 August 2019, 21:25

Looks good Mathesar. No Autoboot, right? I think your board is the same as Matze's SimpleIDE ?

Kai · 22 August 2019, 13:15

It's a 2 layer design. The DRAM board plugs into the space where the 44256 DIP's go. can see here on my near complete A500++ repro board:

Without sockets fitted, it should just allow the keyboard to sit right, but in sockets, it's too much Z-height and will foul.

hooleydog · 28 August 2019, 22:13

Ok I see now. Just wondering I would like to build myself a 500+ repro board.. Do you have the gerbers for it.. Because there is one on PCBWay.. But it's not complete..

Oh I see that your in Brighton. I was born there, and lived in lower Bevendeen..

Thanks..

hooleydog · 01 September 2019, 22:45

Quote:

Originally Posted by Mathesar

I have a modified/improved design for Mika Leinonen's IDE controller running in my A500.
I improved the IDE interface timing (it's faster now) and fixed some small bugs in the driver (the original driver would hang if it tried to access a non exisiting slave drive). Unfortunately it is not autobooting but it runs quite well and it is very easy to build.

See below schematic and PCB render:
Attachment 63600 Attachment 63601
For a real life pictures see here:
http://eab.abime.net/attachment.php?...3&d=1509650841

Hi.. Any Gerbers, so I can some PCB's made..

Thanks..

Mathesar · 02 September 2019, 11:15

Quote:

Originally Posted by katarakt

Looks good Mathesar. No Autoboot, right? I think your board is the same as Matze's SimpleIDE ?

No, not autobooting unfortunately. I boot mine from a boot floppy that mounts the ide drive and then hands over control to the boot partition. Works fine and pretty quick.
I don't know Matze's design so I have no idea if his is similar. I have improved this design: http://www.mkl211015.altervista.org/ide/a500ide.html
The original design's timing is slightly messy. By adding the flip flops and some logic the timing should now be correct although faster than old PIO0, more like PIO3..4. Modern devices handle that without problems though.

31 July 2019, 23:24	#31
hooleydog Registered User Join Date: Aug 2017 Location: Southfield Posts: 53	A500-14Mhz-Accelerator Hi, is this board a 2-layer or 4-layer.. What I mean has he done a 4-layer board.. Last edited by hooleydog; 01 August 2019 at 00:22.

02 August 2019, 03:16	#33
hooleydog Registered User Join Date: Aug 2017 Location: Southfield Posts: 53	Ok.. Now off topic.. Where do you plug in this other board.. The Dram board... No instructions or pictures.... You see I'm gonna order some. Nice design... Attached Thumbnails Last edited by hooleydog; 03 August 2019 at 02:48.

28 August 2019, 22:13	#38
hooleydog Registered User Join Date: Aug 2017 Location: Southfield Posts: 53	Ok I see now. Just wondering I would like to build myself a 500+ repro board.. Do you have the gerbers for it.. Because there is one on PCBWay.. But it's not complete.. Oh I see that your in Brighton. I was born there, and lived in lower Bevendeen.. Thanks.. Last edited by hooleydog; 28 August 2019 at 22:27.

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29 June 2019, 20:51	#21
Kai Registered User Join Date: Apr 2011 Location: Brighton, UK Age: 41 Posts: 114	IDE is something i havent figured out quite yet - at least not a way that makes it easily accessible to hobbyists...I mean, i could integrate IDE in a way, but it wouldn't be autobooting...I'd presume it just needs an inline rom, but thats not my forte... Still, any advice or ideas welcome

30 June 2019, 07:32	#22
Jope - Join Date: Jul 2003 Location: Helsinki / Finland Age: 43 Posts: 9,861	The popular option for ide implementations these days is the Gayle emulation style IDE. The drivers for this are in ROM since 2.05 (37.300).

30 June 2019, 16:17	#23
patrik Registered User Join Date: Jan 2005 Location: Umeå Age: 43 Posts: 922	Another option which is used on the TK 68030 IDE+SRAM card is to implement a oktagon style IDE interface and use that driver. https://github.com/MHeinrichs/68030t..._IDE-interface Providing the driver in autoconfig ROM would also make it bootable on 1.3. Other weak points in the C= scsi.device driver is the MaxTransfer bug and problem with 4GB+ drives which both has caused users and community in general massive headaches through the years. Does anyone know how the oktagon driver fares in these aspects?

03 July 2019, 13:09	#26
E-Penguin Banana Join Date: Jul 2016 Location: Darmstadt Posts: 1,213	Nice! I guess it's just plug n' play, no autoconfig to worry about? I've got an A590 on the side expansion that doesn't like sharing.

01 August 2019, 21:03	#32
Kai Registered User Join Date: Apr 2011 Location: Brighton, UK Age: 41 Posts: 114	It's a 2-layer board

11 August 2019, 21:25	#36
katarakt Registered User Join Date: Jul 2017 Location: Germany Posts: 205	Looks good Mathesar. No Autoboot, right? I think your board is the same as Matze's SimpleIDE ?

22 August 2019, 13:15	#37
Kai Registered User Join Date: Apr 2011 Location: Brighton, UK Age: 41 Posts: 114	It's a 2 layer design. The DRAM board plugs into the space where the 44256 DIP's go. can see here on my near complete A500++ repro board: Without sockets fitted, it should just allow the keyboard to sit right, but in sockets, it's too much Z-height and will foul.

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