The TF1260 rev1 arrives!!! Oh boy!

[supaduper]

oh Ok I will go over it with a fine tooth comb

[terriblefire]

oh Ok I will go over it with a fine tooth comb

Ah i think i realized what might be happening... I've got a 6ns RAM CPLD..

EDIT: try this

tf1260r1_2020_01_26_alpha.zip

(53.27 KiB) Downloaded 171 times

the 6ns suffix is for 6ns CPLDs. Otherwise use the standard one.

[supaduper]

I was racking my brains last night and was just about to mention again that I had put two 10 ns cplds on my build and also I have 1k resistor arrys on all my pads except the 10k one by the multiplier, but I scanned your Stream again and noticed you have some 220 ohm ones on yours will that matter Steve ?
I will try the jeds when I get up from my bed lol

[terriblefire]

Yeah the data bus ones absolutely have to be 220 or 0 ohm. 1k is too high. That’s the 8 in a fan around the RAM.

Also the resistor inside the TF logo needs to be 220z

[supaduper]

ok cheers. I have now took the 10ns ram cpld off and put a 6ns like yours on, so we are on the same song sheet, will now swap out those 1k resistor arrays

[supaduper]

Yep that did it, we are in like Flyn

2nd TF1260 r1 lives ! with 128mb ram

Also never mention resistor arrays again lol , now I know what it is like to soldier ants..geddit ? I`ll get me coat

[terriblefire]

I’m going to flip the 8 of those to the bottom so they can be auto assembled.

[Higgy]

Great work guys. Glad to hear it was not A1200 motherboard revision related.
Can you please remind me of the main Rev 1 goal, was it mainly to increase past 66/75Mhz reliably?

On aside I was singing all your praises at the SWAG Workbench 2020 AMIGA meet. AmigaKIT said they will be releasing an 8mb A1200 RAM expansion for £60 soon, its good to hear that there are some sellers who are seeing the light and offering reasonably priced kit.

[terriblefire]

Todays iteration of the firmware

I identified a glitch that will prevent operation (causes a bus lock) at ~80 MHZ. Its by not means fixed everything but wanted to push todays changes out for testing.

tf1260r1_2020_01_27_alpha.zip

(54.13 KiB) Downloaded 155 times

[supaduper]

Will try this first thing in the morning Steve

What glitch were you getting ? as I set CPUSPEED to 80mhz and I ran Quake on loop with no problems