Search found 1672 matches

by slingshot
Tue Apr 02, 2019 2:09 pm
Forum: MiST
Topic: Mist and an audio input... is it possible?
Replies: 64
Views: 20408

Re: Mist and an audio input... is it possible?

After a while you'll get tired of that flickering 50-60 Hz CRT screen :)
@DrOG I wonder after the increased shunt resistor, it still doesn't accept lower levels.
by slingshot
Tue Apr 02, 2019 8:17 am
Forum: MiSTer
Topic: Genesis Core
Replies: 540
Views: 139756

Re: Genesis Core

I was watching the new Digital Foundry video on Blast Processing as they were testing the new mega sg. I tried it on the mister core and it doesn't display the image correctly. Links below for anyone interested. DF Video: https://www.youtube.com/watch?v=rvvL6S5Buiw Test Rom: https://drive.google.co...
by slingshot
Mon Apr 01, 2019 9:02 pm
Forum: MiST
Topic: Updated ST Core?
Replies: 56
Views: 10248

Re: Updated ST Core?

Well, testers are welcome. Especially MIDI/ethernec/external serial/parallel ports, which I don't have the hardware for (if you can compile yourself only, no binary release yet, still lots of issues):
https://github.com/gyurco/mist-board/tr ... xperiments
by slingshot
Mon Apr 01, 2019 8:59 pm
Forum: Hardware
Topic: RAM write wait states
Replies: 59
Views: 12117

Re: RAM write wait states

Otherwise, and as you are saying, the number of wait states is a direct consequence of the alignment between the MMU slots and the cycle that the CPU starts the bus access. I think we agree on this. Well, not in the cases I've examined. But seems there's a common factor - STE DMA sound. However it ...
by slingshot
Mon Apr 01, 2019 3:46 pm
Forum: Hardware
Topic: RAM write wait states
Replies: 59
Views: 12117

Re: RAM write wait states

You should see 0 or 2 wait states on almost every case. The only exceptions should be the very first access after reset, and after another access that in turn provoked an odd number of wait states (see below for one example). Will investigate it a bit more then...However it must be something else b...
by slingshot
Mon Apr 01, 2019 1:02 pm
Forum: Hardware
Topic: RAM write wait states
Replies: 59
Views: 12117

Re: RAM write wait states

So 3 wait states are normal, that was what I wanted to know. I would say 3 wait states are possible, may be normal if you want to use that term, but extremely uncommon. This is because the CPU works with a two cycles accuracy. So normally you would get two, or zero, wait states. One or three wait s...
by slingshot
Mon Apr 01, 2019 7:26 am
Forum: MiST
Topic: Mist and an audio input... is it possible?
Replies: 64
Views: 20408

Re: Mist and an audio input... is it possible?

... It just about accepting an external tape input for the Speccy, how can this help here? (I did a similar mod already on my +2A, just with piggy-backing another jack on the existing one instead of this split stereo). I would try to connect some .cdt player to the MiST's new EAR input. Perhaps I s...
by slingshot
Sun Mar 31, 2019 9:40 pm
Forum: MiST
Topic: Mist and an audio input... is it possible?
Replies: 64
Views: 20408

Re: Mist and an audio input... is it possible?

I forgot it almost as well, perhaps will try this method with the Amstrad core, but first I need to modify the built-in Datacorder of my Spectrum +2A, as I don't have any Amstrad cassettes... Found a nice tutorial, just need some time to realize it: https://spectrumforeveryone.com/technical/modifyi...
by slingshot
Sun Mar 31, 2019 9:00 pm
Forum: Hardware
Topic: RAM write wait states
Replies: 59
Views: 12117

Re: RAM write wait states

. . . Sorry, you're right, it's about MMU. Yes, you guessed it, it's for the MiST core. I'm in a process to change of the TG68K CPU to your FX68K. So 3 wait states are normal, that was what I wanted to know. Something is a bit slow after the CPU change, since there are titles which don't work with ...
by slingshot
Sun Mar 31, 2019 8:49 pm
Forum: MiST
Topic: Mist and an audio input... is it possible?
Replies: 64
Views: 20408

Re: Mist and an audio input... is it possible?

... And would be good to try C64's serial port, too. Paradroyd forum member wrote a nice tutorial, needs a RPi to work: https://www.google.com/amp/blog.paradroyd.com/post/134610727951/making-a-serial-connection-to-the-mist-fpga/amp I think a simple RS232-USB serial converter should work connecting ...
by slingshot
Sun Mar 31, 2019 6:31 pm
Forum: MiST
Topic: How actively are you using your MiST?
Replies: 94
Views: 19692

Re: How actively are you using your MiST?

My opinion is that instead of forking, there can be support for multiple boards in one source tree. There are some examples for it already (sadly with lots of unmaintained parts). This would save a lot of developer effort with porting patches back and forth. I personally think that all 8 bit cores s...
by slingshot
Sun Mar 31, 2019 6:20 pm
Forum: MiST
Topic: Mist and an audio input... is it possible?
Replies: 64
Views: 20408

Re: Mist and an audio input... is it possible?

DrOG wrote:Hi!

I have built the V6Z80P tape input adapter and it works fine!
I wanted to build this for ages :) Nice little board. Also ZX81, Apple IIe and Amstrad cores support it. And would be good to try C64's serial port, too.
by slingshot
Sat Mar 30, 2019 4:00 pm
Forum: Hardware
Topic: RAM write wait states
Replies: 59
Views: 12117

RAM write wait states

Hi! Anyone knows the exact number of wait states the GLUE applies for _writes_? I know, the write data is latched ASAP (when exactly? At the first write cycle, when ASn and RWn goes low, or in the second, where UDSn and/or LDSn, too?), then when DTACKn is issued? I mean, if the write cycle starts ex...
by slingshot
Thu Mar 28, 2019 12:23 pm
Forum: MiST
Topic: How actively are you using your MiST?
Replies: 94
Views: 19692

Re: How actively are you using your MiST?

I'm not sure the PCB was provisioned for adding the PIN headers (btw, the test pin of the ARM for activating SAM-BA bootloader is accessible? Otherwise it's very hard to recover from a bad firmware flash - it saved my MiST once from bricking).
by slingshot
Thu Mar 28, 2019 9:53 am
Forum: MiST
Topic: MiST board in STEroids mode crashes with EmuTOS
Replies: 15
Views: 3785

Re: MiST board in STEroids mode crashes with EmuTOS

Probably the increased memory bandwidth also adds some to the benchmark value. But if you need only the standard 16MHz, why don't you use Mega STE mode? It's not a "benchmark value" but an exact cycle time (I guess). I just want to know why the STEroids mode crashes when using the newest EmuTOS ver...
by slingshot
Wed Mar 27, 2019 2:25 pm
Forum: MiST
Topic: How actively are you using your MiST?
Replies: 94
Views: 19692

Re: How actively are you using your MiST?

If only developers bought MiST, then probably it wouldn't sell more than 10 units. I bought myself as a user, then I became a developer. It wouldn't be possible with Mistica. Of course you can start to develop without the JTAG connectors, but it'll be very painful after a while.
by slingshot
Wed Mar 27, 2019 1:06 pm
Forum: MiST
Topic: MiST board in STEroids mode crashes with EmuTOS
Replies: 15
Views: 3785

Re: MiST board in STEroids mode crashes with EmuTOS

Probably the increased memory bandwidth also adds some to the benchmark value. But if you need only the standard 16MHz, why don't you use Mega STE mode?
by slingshot
Wed Mar 27, 2019 12:57 pm
Forum: MiST
Topic: Colecovision last new core and issues
Replies: 15
Views: 5232

Re: Colecovision last new core and issues

The original maker was Arnim Laeuger, more than 10 years ago. Since that many people took it and modified, well, including me.
by slingshot
Wed Mar 27, 2019 12:50 pm
Forum: MiST
Topic: MIST C64 core
Replies: 323
Views: 103366

Re: MIST C64 core

Well, I would say fixing VIC-II and 1541 bugs are higher priority.
by slingshot
Mon Mar 25, 2019 10:57 pm
Forum: MiST
Topic: MiST board in STEroids mode crashes with EmuTOS
Replies: 15
Views: 3785

Re: MiST board in STEroids mode crashes with EmuTOS

I'm tweaking the ST core currently, and as I see, steroids mode has a bit of memory cache, which might speed up RAM access times, so the whole thing. Is there any other cache than in the MSTE mode? However, when deactivating three of the four 32 MHz flanks in STEroids mode, the processor clock shou...
by slingshot
Sun Mar 24, 2019 9:12 pm
Forum: MiST
Topic: MiST board in STEroids mode crashes with EmuTOS
Replies: 15
Views: 3785

Re: MiST board in STEroids mode crashes with EmuTOS

I'm tweaking the ST core currently, and as I see, steroids mode has a bit of memory cache, which might speed up RAM access times, so the whole thing.
by slingshot
Sun Mar 24, 2019 7:08 pm
Forum: MiST
Topic: MiST core and firmware changelog
Replies: 179
Views: 134378

Re: MiST core and firmware changelog

A new compiled firmware is available in a pull request (see your linked thread) but this wasn't merged into the mist-binaries repo. Maybe the firmware maintainers take care of the 3 new pull requests I created on Friday... :wink: As the phrase of "active maintanerS" is bit funny, but I'll look at t...
by slingshot
Wed Mar 20, 2019 9:33 pm
Forum: MiST
Topic: SMS core
Replies: 120
Views: 54371

Re: SMS core

Here's a fix for Shadow Dancer:
https://github.com/mist-devel/mist-bina ... 190320.rbf
Hope didn't break other games.
by slingshot
Tue Mar 19, 2019 3:07 pm
Forum: MiST
Topic: FPGA64 - C64
Replies: 84
Views: 16156

Re: FPGA64 - C64

Tested the new core with mouse support, all is ok. Played Arkanoid and Arkanoid II In the meanwhile I tested various cores on the latest MISTICA. All work properly except for Minimig. I think the new sd-ram has problems with this core like C64 one. Minimig wasn't modified for a while. But it's poss...

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