Search found 2987 matches

by exxos
Mon Apr 16, 2018 10:14 am
Forum: HARDWARE DISCUSSIONS
Topic: Suska board
Replies: 35
Views: 2659

Re: Suska board

.. and to put the CPU cycle accurate to rest.. Hi Chris, i think, that my 68K00 CPU (and also the other ones) are not Cycle by Cycle compatible. I have optimized a few things as you see for example the very slow division of the MC68000. Wolfgang and if the core could run faster... no, the implementa...
by exxos
Sun Apr 15, 2018 9:47 pm
Forum: RAM UPGRADES
Topic: 520 STFM 256kx4 DIL to 1Mx4 SOJ
Replies: 6
Views: 746

Re: 520 STFM 256kx4 DIL to 1Mx4 SOJ

Today's geek points go to Troed :thumbup:
by exxos
Sun Apr 15, 2018 12:35 pm
Forum: HARDWARE DISCUSSIONS
Topic: Suska board
Replies: 35
Views: 2659

Re: Suska board

With blitter enabled...

P1040174.JPG
P1040174.JPG (975.1 KiB) Viewed 801 times

Below is 16MHz CPU, ROM, and blitter on.
16CRB_result.png
16CRB_result.png (4.5 KiB) Viewed 800 times
by exxos
Sun Apr 15, 2018 12:12 pm
Forum: HARDWARE DISCUSSIONS
Topic: Suska board
Replies: 35
Views: 2659

Re: Suska board

Medium res benchmark.. P1040173.JPG Going by ROM its like a 16MHz machine. Other display tests look more like a 32MHz machine. Int-div looks somewhere around 25MHz machine. So I think the Suska CPU is running instructions faster than a real 68000. Not saying this is good or bad, depends what the end...
by exxos
Sun Apr 15, 2018 11:48 am
Forum: CHAT FORUM
Topic: Not like I wanted it anyway...
Replies: 7
Views: 881

Re: Not like I wanted it anyway...

Petari wrote:
Sat Apr 14, 2018 8:55 am
Cat is cat, so wants milk. I guess you need to put on table something scarier than those zombie magazines :mrgreen:
Maybe puppie :lol:
:lol: Well, if we give her own milk, she not drink any. Also dog not working, tried before , cat wins I think :lol:
by exxos
Sun Apr 15, 2018 11:45 am
Forum: 8 BIT CORNER
Topic: 2600 Composite mod
Replies: 29
Views: 2886

Re: 2600 Composite mod

rubber_jonnie wrote:
Fri Apr 13, 2018 11:22 pm
You know me, I'm definitely up for that :)
:dualthumbup: Will send a pcb this week, will do a parts list for you as well soon.. There are a couple resistors of slightly "unknown" values due to untested changes.. So you may need a couple of presents to fine adjust them..
by exxos
Sun Apr 15, 2018 11:29 am
Forum: HARDWARE DISCUSSIONS
Topic: Suska board
Replies: 35
Views: 2659

Re: Suska board

I just got the benchmarks back from Wolfgang. Though I didn't mention to run in medium-res :roll: Results for mono won't compare to medium res even with a stock machine, so I have asked him to re-run the test in medium res. From what I can tell so far, the system runs around 16MHz, or very close to,...
by exxos
Sun Apr 15, 2018 10:04 am
Forum: HARDWARE DISCUSSIONS
Topic: Suska board
Replies: 35
Views: 2659

Re: Suska board

He said similar to me. He said the CPU runs at 16mhz and has a pseudo 8mhz mode, whatever that means.

So it seems the CPU has no fully compatible mode :(
by exxos
Sun Apr 15, 2018 9:47 am
Forum: CHAT FORUM
Topic: USB Audio Interface
Replies: 13
Views: 1045

Re: USB Audio Interface

:goodpost: glad to see the real reason for ground issues posted. You know I tried to explain exactly that to people years ago and nobody understood it and most forum discussions never even considered the floating gnd with double insulated equipment, I actually blew the audio out on my falcon due to ...
by exxos
Sat Apr 14, 2018 5:25 pm
Forum: PSU (power supplies)
Topic: TT PSU problems
Replies: 3
Views: 490

Re: TT PSU problems

PSU of course needs to be tested under load of resistors. But I fear if its outputted 7.5V onto your machine then it could have killed it :(

I would check with scope and make sure you are not seeing peak voltages with your meter. May be bad soldering on output capacitors..