Search found 71 matches

by Badwolf
Sat Jan 16, 2021 5:42 pm
Forum: HARDWARE DISCUSSIONS
Topic: PLD SDRAM controller ?
Replies: 16
Views: 207

Re: PLD SDRAM controller ?

terriblefire wrote:
Fri Jan 15, 2021 10:25 pm
There is the TF sources... officially here..
https://github.com/hologenics
My original SDRAM controller is...
https://github.com/mist-devel/archimede ... /rtl/sdram
Thanks for linking these :dualthumbup:

BW
by Badwolf
Fri Jan 15, 2021 8:45 pm
Forum: HARDWARE DISCUSSIONS
Topic: PLD SDRAM controller ?
Replies: 16
Views: 207

Re: PLD SDRAM controller ?

I’ve been working on just this in verilog on and off for the last three of weeks! Mine’s currently taking a cue from Stephen’s old TF330 sources https://github.com/fluffyfreak/tf330/tree/master/rtl and tweaking it to my chips and circumstance. It worked right up to the point it didn’t any more and I...
by Badwolf
Thu Jan 14, 2021 7:09 pm
Forum: Terriblefire's channel
Topic: Terriblefire State of the Union....
Replies: 41
Views: 948

Re: Terribllefire State of the Union....

Good luck with the move, TF & glad to hear you you got your latest boards up and running.

Hope your mood improves enough in the future to see a few more bits and pieces appear on GitHub, if only firmware.

o/

BW.
by Badwolf
Thu Jan 14, 2021 11:25 am
Forum: CHAT FORUM
Topic: What's in the box?
Replies: 3
Views: 77

What's in the box?

AKA packaging of the day award.

Sexy looking box. It's twice the size of the new broadband router I had delivered yesterday.
IMG_4053 copy.jpeg
IMG_4053 copy.jpeg (127.93 KiB) Viewed 77 times
Really?!
IMG_4056 copy.jpeg
IMG_4056 copy.jpeg (171.03 KiB) Viewed 77 times
Good work, Farnell. :lol:

BW.
by Badwolf
Mon Dec 14, 2020 9:12 pm
Forum: TF536 ST EDITION
Topic: TF536 + 68000 relocator and ROM board project.
Replies: 362
Views: 21759

Re: TF536 + 68000 relocator and ROM board project.

I'm putting this project on hold until the SMD 68030 processors arrive from China, which may be as late as February. Is that the ceramic QFP one? I’ve one sitting around from an aborted card revision I could send you over if you’d like? You can send me one back when it arrives in the new year. PM m...
by Badwolf
Sat Nov 21, 2020 12:53 am
Forum: TF536 ST EDITION
Topic: TF536 + 68000 relocator and ROM board project.
Replies: 362
Views: 21759

Re: TF536 + 68000 relocator and ROM board project.

According to Motorola, asserting /HALT on the 68000 makes the address and data lines go high impedance, i.e. they stop being connected to the pins electrically in effect. Seeing as both sockets are for a 68000 compatible processor any interface logic between the socket and accelerated processor wou...
by Badwolf
Fri Nov 20, 2020 10:36 pm
Forum: TF536 ST EDITION
Topic: TF536 + 68000 relocator and ROM board project.
Replies: 362
Views: 21759

Re: TF536 + 68000 relocator and ROM board project.

I'm mostly using @derkom's design. It's switching the bus arbitration and some outputs. I've added controlling the /HALT line. The CPU which isn't in use has the /HALT line pulled low so that it's constantly halted and has all the address and data lines in tristate so that they don't load the buses...
by Badwolf
Fri Nov 20, 2020 7:33 pm
Forum: HARDWARE DISCUSSIONS
Topic: David's Falcon Booster rev 3 -- dabbling with DRAM
Replies: 11
Views: 5547

Re: David's Falcon Booster rev 3 -- dabbling with DRAM

@Badwolf I'm also watching this with interest... would be a great upgrade to my Falcon at some point in the future! No rush from my perspective though, far too many other retro projects to try and finish first! Thanks, Jez. If I can get a board going that needs 3 or fewer bodge wires, I might start...
by Badwolf
Fri Nov 20, 2020 7:31 pm
Forum: HARDWARE DISCUSSIONS
Topic: David's Falcon Booster rev 3 -- dabbling with DRAM
Replies: 11
Views: 5547

Re: David's Falcon Booster rev 3 -- dabbling with DRAM

The DSP simply doesn't work. Any DSP-enabled software hangs the machine. That'll be my next line of investigation whilst the boards are out. Are you using EmuTOS to test this? Just that the DSP isn't supported yet mate:- EmuTOS does not yet support all of the hardware on original Atari systems. The...
by Badwolf
Fri Nov 20, 2020 7:27 pm
Forum: TF536 ST EDITION
Topic: TF536 + 68000 relocator and ROM board project.
Replies: 362
Views: 21759

Re: TF536 + 68000 relocator and ROM board project.

OK, it's fixed the low performing 68000, so it was obviously the Power/GND noise which was causing the CPU to miss clock cycles. IMG_2106.jpg I've just sat down and read this mammoth thread all the way through as it looked interesting. Great last post to get to! Well done, Stephen. I'm not sure I'v...

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