Search found 1064 matches

by MasterOfGizmo
Mon Sep 17, 2018 9:51 am
Forum: MiST
Topic: Old Spectrum core with esxDOS support
Replies: 7
Views: 312

Re: Old Spectrum core with esxDOS support

The MIST then uses the SD card and the core uses an image file stored on the SD card and thinks that image file is the SD card. Yeah, the .vhd file and sd_card.v is a good solution for using +3e. But i am confused. I am sure i implemented exactly that for the speccy core running esxdos a few years ...
by MasterOfGizmo
Sun Sep 16, 2018 6:55 pm
Forum: MiST
Topic: Old Spectrum core with esxDOS support
Replies: 7
Views: 312

Re: Old Spectrum core with esxDOS support

Supporting an MMC card interface for +3e (or ResiDOS) is not hard, but how do you share the SD card between MiST and +3e? It's not that straightforward, +3e cannot read the FAT filesystem. Many cores had the same problem. That's why i implemented the fake SD card quite some time ago. The MIST then ...
by MasterOfGizmo
Sun Sep 16, 2018 10:46 am
Forum: Professionals
Topic: Falcon Nova Adapter ...
Replies: 24
Views: 1015

Re: Falcon Nova Adapter ...

Because the video memory of the card uses the same memory range as a part of the 14MB ST ram does.
by MasterOfGizmo
Sat Sep 15, 2018 2:04 pm
Forum: MiST
Topic: Atari 2600 / VIC 20
Replies: 36
Views: 1213

Re: Atari 2600 / VIC 20

slingshot wrote:Tutankham thinks you always want to go right...didn't find the reason yet.


Same with exterminator
by MasterOfGizmo
Sat Sep 15, 2018 8:01 am
Forum: MiST
Topic: Atari 2600 / VIC 20
Replies: 36
Views: 1213

Re: Atari 2600 / VIC 20

MasterOfGizmo wrote:For me the floppy has stopped working in this latest core ...


It works. Dunno why i was having problems ....
by MasterOfGizmo
Fri Sep 14, 2018 7:20 pm
Forum: MiST
Topic: Atari 2600 / VIC 20
Replies: 36
Views: 1213

Re: Atari 2600 / VIC 20

For me the floppy has stopped working in this latest core ...
by MasterOfGizmo
Fri Sep 14, 2018 7:08 pm
Forum: MiST
Topic: Atari 2600 / VIC 20
Replies: 36
Views: 1213

Re: Atari 2600 / VIC 20

Most carts seem to be NTSC. I had the image shifted to the top left corner on real hardware as well. This happens because cartridges need to initialize the video hardware themselves and they initialize a PAL VIC as if it was a NTSC one. One would have to implement a proper NTSC mode for the VIC in w...
by MasterOfGizmo
Fri Sep 14, 2018 1:46 pm
Forum: MiST
Topic: Atari 2600 / VIC 20
Replies: 36
Views: 1213

Re: Atari 2600 / VIC 20

I spent a few hours with the VIC20 m6561 VIC chip. I made two small changes (already submitted to slingshot for inclusion) which greatly increase demo compatibility. Many great demos now run pretty good. I think there are also some problems with memory mapping left like which memory mirrors where es...
by MasterOfGizmo
Thu Sep 13, 2018 6:29 pm
Forum: MiST
Topic: Atari 2600 / VIC 20
Replies: 36
Views: 1213

Re: Atari 2600 / VIC 20

desUBIKado wrote:Could you make VIC20 folder as default folder for .PRG and .D64 loading?


It already is. That's nothing the core does itself. It's the io controller (the part running the MIST firmware) that automatically searches under the name of the running core.
by MasterOfGizmo
Thu Sep 13, 2018 6:22 pm
Forum: MiSTer
Topic: Atari 2600
Replies: 21
Views: 3520

Re: Atari 2600

my whole point of reporting it was so the original core writer could look into it In most cases the original core writer started the work many years ago on a completely different board. In case of the A2600 core the original source is https://hackaday.com/2010/09/15/atari-2600-recreated-in-an-fpga/...
by MasterOfGizmo
Thu Sep 13, 2018 2:31 pm
Forum: MiST
Topic: Atari 2600 / VIC 20
Replies: 36
Views: 1213

Re: Atari 2600 / VIC 20

Excellent! This was the first computer i owned and this is now the first time i have used a floppy disk with it. Very funny ... I just sent you a PR with YPbPr support for it.

I haven't yet managed to use the CRT support. But that may be because it's a WIP ...

Anyway, great work!
by MasterOfGizmo
Wed Sep 12, 2018 2:04 pm
Forum: MiST
Topic: New feature: YPbPr/RGsB output
Replies: 109
Views: 21429

Re: New feature: YPbPr/RGsB output

A proper sdc file in this case can help a lot (decoupling async clocks - but synchronizers still has to be used, which are missing at least from user_io in a lot of cores, this can result in unstable sd reading - , give the delays to the input-output ports, mostly to the SDRAM). Yes, the user_io wa...
by MasterOfGizmo
Wed Sep 12, 2018 11:33 am
Forum: MiST
Topic: New feature: YPbPr/RGsB output
Replies: 109
Views: 21429

Re: New feature: YPbPr/RGsB output

slingshot wrote:When I did the change


Turned out it's not related to that string but a general build-to-build instability of the apple core. I just released a apple ii core that seems to work fine with loading NIBs and also has (untested) support for ypbpr.
by MasterOfGizmo
Wed Sep 12, 2018 6:32 am
Forum: MiST
Topic: New feature: YPbPr/RGsB output
Replies: 109
Views: 21429

Re: New feature: YPbPr/RGsB output

NIB load does not work, tried it with the earlier core version from 2016 as well, bad also. It certainly worked, I remember that played Choplifter some months (a year?) ago. Perhaps some of the firmware updates broke it as you suspects. Someone willing to help may test earlier firmware versions and...
by MasterOfGizmo
Wed Sep 12, 2018 6:11 am
Forum: MiST
Topic: MiST Keypad Missing Brackets
Replies: 5
Views: 202

Re: MiST Keypad Missing Brackets

Please install the latest firmware from https://github.com/mist-devel/mist-bina ... r/firmware

It maps the keypad ( and ) to PC PrintScr and End which were unused so far. Of course you can now also remap them as you want.
by MasterOfGizmo
Tue Sep 11, 2018 8:38 pm
Forum: MiST
Topic: MiST Keypad Missing Brackets
Replies: 5
Views: 202

Re: MiST Keypad Missing Brackets

That's indeed not possible with the current firmware. Maybe it's possible to map those st keys onto some usb keycodes which usually don't exist. You could then use those codes when swapping keys. I'll have a look asap.

I'd never expect someone to ever miss those two keys ....
by MasterOfGizmo
Tue Sep 11, 2018 3:09 pm
Forum: MiST
Topic: Genesis / Megadrive core ported to MiST
Replies: 213
Views: 46906

Re: Genesis / Megadrive core ported to MiST

That looks like the same issue i see with the Sonic intro. There a just too many lines displayed on the screen and the image should end ealier.
by MasterOfGizmo
Tue Sep 11, 2018 9:58 am
Forum: MiST
Topic: Genesis / Megadrive core ported to MiST
Replies: 213
Views: 46906

Re: Genesis / Megadrive core ported to MiST

desUBIKado wrote:Yes, I have a Mistica FPGA16


Then you should get in touch with the makers of that board. I've never seen one myself and cannot help you there. I don't even know how their video works.
by MasterOfGizmo
Tue Sep 11, 2018 8:09 am
Forum: MiST
Topic: New feature: YPbPr/RGsB output
Replies: 109
Views: 21429

Re: New feature: YPbPr/RGsB output

You're right, but I'm not familiar with FPGA programming, and there are some abandoned cores, like Apple ][ or ColecoVision, which have non-standard (reversed) sync polarity... I just adjusted the sync polarity of the apple ][ core. Find it at: https://github.com/mist-devel/mist-binaries/tree/maste...
by MasterOfGizmo
Tue Sep 11, 2018 6:21 am
Forum: MiST
Topic: New feature: YPbPr/RGsB output
Replies: 109
Views: 21429

Re: New feature: YPbPr/RGsB output

Sorgelig wrote:But using resistor is not a good idea as it will pulls up and pulls down


Why would that hurt?
by MasterOfGizmo
Tue Sep 11, 2018 6:10 am
Forum: MiST
Topic: New feature: YPbPr/RGsB output
Replies: 109
Views: 21429

Re: New feature: YPbPr/RGsB output

The conversion from RGB to YPbPr is a color space conversion. And the screen converts back to RGB or whatever it uses internally. So I wouldn't be surprised if the colors in both modes differ. I'd even expect this effect to vary from screen to screen.
by MasterOfGizmo
Tue Sep 11, 2018 6:07 am
Forum: MiST
Topic: Genesis / Megadrive core ported to MiST
Replies: 213
Views: 46906

Re: Genesis / Megadrive core ported to MiST

desUBIKado wrote:With RGB mode the image is not centered and lost upper area


Huh? Both screenshots say "TV - 15khz"
by MasterOfGizmo
Tue Sep 11, 2018 6:04 am
Forum: MiST
Topic: Genesis / Megadrive core ported to MiST
Replies: 213
Views: 46906

Re: Genesis / Megadrive core ported to MiST

Worms has the same graphic glitches at the bottom of the screen as the previous release. Do we have a screenshot of that? Is it just ~16 additional more or less random lines which shouldn't be there at all? Then it's the same issue i see on Sonic as well. This is probably a bug in the VDP implement...
by MasterOfGizmo
Mon Sep 10, 2018 6:28 pm
Forum: MiST
Topic: New feature: YPbPr/RGsB output
Replies: 109
Views: 21429

Re: New feature: YPbPr/RGsB output

Cannot tell about capacitor. Transistor is required as it mixes Sync to Y/G in both modes 15KHz and 31KHz. As you know, YPbPr supports both 15KHz and 31KHz sync, so this circuit universal and works in both cases CSync and HVSync. Having thought about this a little more I am pretty sure the transist...
by MasterOfGizmo
Mon Sep 10, 2018 5:52 pm
Forum: MiST
Topic: Genesis / Megadrive core ported to MiST
Replies: 213
Views: 46906

Re: Genesis / Megadrive core ported to MiST

I just added a new release. The CPU core has been updated from the very old tg68 to the latest tg68k as used in the amiga and atari st cores. I actually don't see a difference but it may be useful to check the newer version in case of problems with the old one. Also the overall cpu speeds may differ...

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