Atari 2600 / VIC 20

[Lroby74]

Yes

Did it, thank you!

Now it's time to create C16.ROM

[DrOG]

Hi!

This weekend I noticed that the video out of the Atari 2600 core shows some colors wrongly in case of PAL ROMs if scanlines are set to 25 or 50%. Usually I connect my MiST over SCART to the display, but this time tried component. Over VGA (only NTSC ROMs are compatible with my TV using this connector) no such decoloration, but scanlines are barely visible over blue background. See attachments taken from Seaquest.

Cheers: Gábor

[slingshot]

The reduced scanline modes are discarding some bits from the RGB output, and sometimes it can transfer to some different colors, as I see. Will check once...

[DrOG]

The reduced scanline modes are discarding some bits from the RGB output, and sometimes it can transfer to some different colors, as I see. Will check once...

Thank you in advance! Not urgent at all, I use mainly SCART connector in case of my main screen as it's very picky in aspect of non-standard resolutions/refresh rates over VGA as mentioned earlier.

[Lroby74]

A friend of mine (Antonino or Nino for friends Porcino) started very recently to study Verilog and VHDL, and added in the Vic20 core the ability to read an audio file (for now) from the Mistica EAR port, his goal would be to become expert enough to add full support for TAPs (including the various Datasette keys) in the C64 core.

He released a small demonstration video:
https://www.facebook.com/groups/2955017 ... 625401460/

[DrOG]

A friend of mine started very recently to study Verilog and VHDL, and added in the Vic20 core the ability to read an audio file (for now) from the Mistica EAR port, his goal would be to become expert enough to add full support for TAPs (including the various Datasette keys) in the C64 core.
He released a small demonstration video:
https://www.facebook.com/groups/2955017 ... 625401460/

It would be really nice! Mistica's EAR port can be easily reproduced on a daughterboard for the MiST (in fact I believe Mistica utilized the original schematic of V6Z80P, as they are the same - BC846 is the SMD version of BC548, see attachments).

We recently try to modify the original circuit to accept lower signal levels (perhaps line-in voltages as well), see details in another topic:
viewtopic.php?f=115&t=30124

[slingshot]

I assumed VIC-20 is complete, I was wrong:

https://github.com/gyurco/VIC20_MiST/releases/tag/1.7

The horrible audio distortion is fixed, also @nippur72 rewrote the sound generator. TAP support is added.

[DrOG]

THX!!! Gonna try it this weekend!

[DanyPPC]

Really great update !

[DanyPPC]

Vic20 core lacks an option like C16/C64 Cores to load a standard kernal, so I have to delete my VIC20 JiffyDOS rom from SD card if I want to load tapes.

[Lroby74]

Vic20 core lacks an option like C16/C64 Cores to load a standard kernal, so I have to delete my VIC20 JiffyDOS rom from SD card if I want to load tapes.

ATM, you can rename or move into a subfolder Vic20.rom file when you need to load TAPs

[vebxenon]

E7 mapper added thanks to Slingshot

https://github.com/mist-devel/mist-bina ... ores/a2600

"E7 - M-Network cart (Bump'n'Jump, Burgertime), use .E7 extension"

[DanyPPC]

Burger time don't move !

[slingshot]

Burger time don't move !

It needs "B" difficulty setting (same in Stella, so not a core bug).

[DanyPPC]

Ah, ok. You are right

[NML32]

I'm happy to see the Atari 2600 core getting updates.