Search found 83 matches

by keli
Mon May 09, 2022 8:13 am
Forum: CHAT FORUM PUBLIC
Topic: Another soul RIP
Replies: 17
Views: 1430

Re: Another soul RIP

Regarding getting things broken in shipping, I remember reading about a bike shop shipping their bikes disguised as flat screens. Apparently flat screens get the velvet glove treatment :) Maybe a similar trick will work with vintage gear. ;) Source: https://cycling.today/bicycle-company-prints-tv-on...
by keli
Mon Apr 19, 2021 9:41 pm
Forum: H5 Phoenix Platform Edition
Topic: H5C1 Buyers interests
Replies: 121
Views: 49156

Re: H5C1 Buyers interests

@exxos if it's not too late, I'd like to get one
by keli
Wed Nov 13, 2019 9:43 pm
Forum: MONGREL H4 USER BUILDS
Topic: exxos build
Replies: 80
Views: 38780

Re: exxos build

Icky wrote: Wed Nov 13, 2019 9:41 pm I think you need a blue pcb psu as well to match :P
I think the colour scheme has a nice UK feel to it...
by keli
Tue Nov 12, 2019 6:28 am
Forum: HARDWARE DISCUSSIONS
Topic: Put 2 YM2149 into the ST
Replies: 38
Views: 18424

Re: Put 2 YM2149 into the ST

You are a brave man. Hope it works out. In case you don't want to fiddle with that analog switch stuff, you might like my latest sketch. It has extra wires out for DA4/5 for the chips that don't need the bit reversed as well as the flipped one. I don't understand exactly this circuit. Is DA4_0 the ...
by keli
Mon Nov 11, 2019 12:50 pm
Forum: FPGA DEVELOPMENT
Topic: BLITTER RE-CREATION THOUGHTS
Replies: 423
Views: 189566

Re: BLITTER RE-CREATION THOUGHTS

exxos wrote: Sun Nov 10, 2019 9:25 pm plus what is inside each block...
We could reimplement the blitter using 74x series chips!!! :P It'll be HUGE!
by keli
Fri Nov 08, 2019 7:08 pm
Forum: MEMBER BLOGS
Topic: Conway's Game of Life on the Blitter
Replies: 7
Views: 6290

Re: Conway's Game of Life on the Blitter

AFAIK the Amiga blitter can combine 2 (or maybe even 3) sources into a single destination, the Atari blitter can only combine a single source with a single destination, overwriting the destination in the process. I'm sure it can be done though. actually Atari BLiTTER can combine three sources: 1) S...
by keli
Fri Nov 08, 2019 6:26 pm
Forum: MEMBER BLOGS
Topic: Conway's Game of Life on the Blitter
Replies: 7
Views: 6290

Re: Conway's Game of Life on the Blitter

I made a life using "grafics"-operations, but with the CPU. It's nicely fast and small (it fits in a boot sector). I got that idea from someone who did life with blitter on the Amiga. As you also found out, you only need to count to 4. It is a reimplementation of an adder logic chip by us...
by keli
Wed Nov 06, 2019 7:33 pm
Forum: HARDWARE DISCUSSIONS
Topic: Put 2 YM2149 into the ST
Replies: 38
Views: 18424

Re: Put 2 YM2149 into the ST

I will get myself a couple YMs and components and cobble together something to check if it works. You are a brave man. Hope it works out. In case you don't want to fiddle with that analog switch stuff, you might like my latest sketch. It has extra wires out for DA4/5 for the chips that don't need t...
by keli
Tue Nov 05, 2019 7:51 pm
Forum: HARDWARE DISCUSSIONS
Topic: Put 2 YM2149 into the ST
Replies: 38
Views: 18424

Re: Put 2 YM2149 into the ST

The 68k sets bdir & bc1 & address %0001xxxx YM0 ignores this, as address is not 0000 YM1, because of delay on the D4 line, also sees 0001, so ignores. then D4 goes low (gets inverted by our additional circuitry) and YM1 sees 0000 and that's a valid address/bdir/bc1 combination, and so it la...
by keli
Tue Nov 05, 2019 7:36 pm
Forum: FPGA DEVELOPMENT
Topic: BLITTER RE-CREATION THOUGHTS
Replies: 423
Views: 189566

Re: BLITTER RE-CREATION THOUGHTS

Sure its a FlipFlop, but why 2 clock inputs, They are just C and /C driven by a inverter elsewhere. Normally C would latch on the falling edge, and /C Would latch on the rising edge. But this one has both. I've noticed this funkyness all over with other blocks as well. I think only 1 clock is neede...

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