Very nice...I'd be interested in a version of this if/when you're in a position to consider making or selling these.
DFB1r3 dev board demonstration video
Re: DFB1r3 dev board demonstration video
By the way, I mentioned in the video that I was experimenting with adding an FPU to the board. It doesn't work for me, alas.
It's recognised and under TOS the FRAC.DSP program will draw its Mandelbrot, but GB6 will crash. Under EmuTOS it's an exception on both.
I've a suspicion I've pushed my particular brand of firmware about as far as I can. I'm getting some odd fitting errors and any little tweak seems to break timing now despite vast swathes of macrocells being available. More work is needed there & therefore timing may be the problem.
In terms of wiring, I've:
BW
It's recognised and under TOS the FRAC.DSP program will draw its Mandelbrot, but GB6 will crash. Under EmuTOS it's an exception on both.
I've a suspicion I've pushed my particular brand of firmware about as far as I can. I'm getting some odd fitting errors and any little tweak seems to break timing now despite vast swathes of macrocells being available. More work is needed there & therefore timing may be the problem.
In terms of wiring, I've:
- All 32 data lines connected
- DSACK[1:0] are connected direct and converted to open drain with 2k2 pullups
- A[4:1] connected to the address bus
- Clock, reset, RW, AS and DS bridged
- Chip Select being the only derived signal based on
Code: Select all
&FC & ( A[19:16] == 4'b0010 ); // co-processor decode
BW
DFB1 Open source 50MHz 030 and TT-RAM accelerator for the Falcon
DSTB1 Open source 16Mhz 68k and AltRAM accelerator for the ST
Smalliermouse ST-optimised USB mouse adapter based on SmallyMouse2
FrontBench The Frontier: Elite 2 intro as a benchmark
DSTB1 Open source 16Mhz 68k and AltRAM accelerator for the ST
Smalliermouse ST-optimised USB mouse adapter based on SmallyMouse2
FrontBench The Frontier: Elite 2 intro as a benchmark
Re: DFB1r3 dev board demonstration video
TF536 hasBadwolf wrote: ↑Fri May 21, 2021 5:33 pm
- Chip Select being the only derived signal based on
Code: Select all
&FC & ( A[19:16] == 4'b0010 ); // co-processor decode
Code: Select all
wire FPUOP = CPUSPACE & ({A[19:16]} === {4'b0010});
https://www.exxosforum.co.uk/atari/ All my hardware guides - mods - games - STOS
https://www.exxosforum.co.uk/atari/store2/ - All my hardware mods for sale - Please help support by making a purchase.
viewtopic.php?f=17&t=1585 Have you done the Mandatory Fixes ?
Just because a lot of people agree on something, doesn't make it a fact. ~exxos ~
People should find solutions to problems, not find problems with solutions.
https://www.exxosforum.co.uk/atari/store2/ - All my hardware mods for sale - Please help support by making a purchase.
viewtopic.php?f=17&t=1585 Have you done the Mandatory Fixes ?
Just because a lot of people agree on something, doesn't make it a fact. ~exxos ~
People should find solutions to problems, not find problems with solutions.
Re: DFB1r3 dev board demonstration video
Hello,
I was wondering if it would be possible to stack the dfb1 on top is a ct60e.
To give a fully compatible and fast 68030 and a 68060.
Just to know
I was wondering if it would be possible to stack the dfb1 on top is a ct60e.
To give a fully compatible and fast 68030 and a 68060.
Just to know
Re: DFB1r3 dev board demonstration video
Haha, I doubt it!
BW
DFB1 Open source 50MHz 030 and TT-RAM accelerator for the Falcon
DSTB1 Open source 16Mhz 68k and AltRAM accelerator for the ST
Smalliermouse ST-optimised USB mouse adapter based on SmallyMouse2
FrontBench The Frontier: Elite 2 intro as a benchmark
DSTB1 Open source 16Mhz 68k and AltRAM accelerator for the ST
Smalliermouse ST-optimised USB mouse adapter based on SmallyMouse2
FrontBench The Frontier: Elite 2 intro as a benchmark
Re: DFB1r3 dev board demonstration video
Cheers.exxos wrote: ↑Sat May 22, 2021 10:22 am TF536 hasSo looks right to meCode: Select all
wire FPUOP = CPUSPACE & ({A[19:16]} === {4'b0010});
Been away for a week so will likely come back to this later this week. Suspecting possibly dodgy fly-leads, TBH.
BW
DFB1 Open source 50MHz 030 and TT-RAM accelerator for the Falcon
DSTB1 Open source 16Mhz 68k and AltRAM accelerator for the ST
Smalliermouse ST-optimised USB mouse adapter based on SmallyMouse2
FrontBench The Frontier: Elite 2 intro as a benchmark
DSTB1 Open source 16Mhz 68k and AltRAM accelerator for the ST
Smalliermouse ST-optimised USB mouse adapter based on SmallyMouse2
FrontBench The Frontier: Elite 2 intro as a benchmark
-
- Posts: 80
- Joined: Wed Aug 19, 2020 12:56 pm
Re: DFB1r3 dev board demonstration video
Any update on this wonderful project?
Re: DFB1r3 dev board demonstration video
Yeah, sorry, not a lot for a number of reasons.
Basically I want a new, more efficient, more reliable firmware before I move back the FPU and rev4.
Cheers for chasing me up, though.
BW
- I've been a way for a bit.
- I've been experimenting with other things.
- Cricket season has started so my weekends aren't as available.
- The FPU hat didn't work 'out of the box' and I hit a dead-end firmware-wise trying to make it so.
Basically I want a new, more efficient, more reliable firmware before I move back the FPU and rev4.
Cheers for chasing me up, though.
BW
DFB1 Open source 50MHz 030 and TT-RAM accelerator for the Falcon
DSTB1 Open source 16Mhz 68k and AltRAM accelerator for the ST
Smalliermouse ST-optimised USB mouse adapter based on SmallyMouse2
FrontBench The Frontier: Elite 2 intro as a benchmark
DSTB1 Open source 16Mhz 68k and AltRAM accelerator for the ST
Smalliermouse ST-optimised USB mouse adapter based on SmallyMouse2
FrontBench The Frontier: Elite 2 intro as a benchmark
-
- Posts: 80
- Joined: Wed Aug 19, 2020 12:56 pm
Re: DFB1r3 dev board demonstration video
Cheers, thanks for the update.