Emulation running, but screen rendered black

[sasq64]

I can step in the debugger and see that the emulation is running.

Disk-image seems to load correctly.

The only log warning I get is not finding palette files, but the code sets a default palette then.

Pixels rendered are all black though. I am using 32-bit gfx mode though which seems to be a bit non-standard and untested.

Also Note: I went back to an older version of the core, and that does produce video.

[sonninnos]

Never managed to make that happen here, since palettes are embedded, and no external files are used or read. Please provide clear steps and log.

[sasq64]

Setting vice_drive_true_emulation = enabled
Setting vice_c64_model = C64C PAL
Setting vice_gfx_colors = 24bit
Trying to load 'connection-8580.prg' ((null))
RETRO:Arg0: x64
RETRO:Arg1: connection-8580.prg
RETRO:Reading configuration file './vice/'.
RETRO:--------------------------------------------------------------------------------
RETRO:VICE x64 (C64) 3.8 8afb6a3a40, Nov  5 2024 15:24:47
RETRO:--------------------------------------------------------------------------------
RETRO:VICE system file directory: ./vice.
RETRO:DriveROM: 'dos2000-cs-33cc6f.bin' ROM image not found. Hardware-level 2000 emulation is not available.
RETRO:DriveROM: 'dos4000-fd-350022.bin' ROM image not found. Hardware-level 4000 emulation is not available.
RETRO:DriveROM: 'bootromCMDHD-v2-80.bin' ROM image not found. Hardware-level CMDHD emulation is not available.
RETRO:Drive: Finished loading ROM images.
RETRO:Sound: Available sound devices: retro
RETRO:Missing name for system file.
RETRO:Main CPU: starting at ($FFFC).
RETRO:Main CPU: RESET.
RETRO:AUTOSTART: Autodetecting image type of 'connection-8580.prg'.
RETRO:Filesystem Image Probe: Import GCR: Unknown GCR image version 48.
RETRO:Filesystem Image: Unknown disk image 'connection-8580.prg'.
RETRO:Tape: Cannot open file 'connection-8580.prg'
RETRO:no CRT header found.
RETRO:CART: '/Users/sasq/projects/demotv/connection-8580.prg' is not a valid CRT file.
RETRO:AUTOSTART: Loading PRG file 'connection-8580.prg' with direct RAM injection.
RETRO:AUTOSTART: Resetting the machine to autostart '*'
RETRO:AUTOSTART: 'connection-8580.prg' recognized as program/p00 file.
RETRO:Reading configuration file './vice/'.
RETRO:Set resource: DosName1541ii => "dos1541ii-251968-03.bin"
RETRO:Set resource: DosName1571 => "dos1571-310654-05.bin"
RETRO:Set resource: DosName1581 => "dos1581-318045-02.bin"
RETRO:Set resource: KernalName => "kernal-901227-03.bin"
RETRO:Set resource: Drive8Type => 1542
RETRO:Set resource: SoundFragmentSize => 1
RETRO:Set resource: AutostartPrgMode => 1
RETRO:Set resource: AutostartDelayRandom => 0
RETRO:Set resource: FSDeviceLongNames => 1
RETRO:Set resource: Mouse => 1
RETRO:Set resource: VICIIPaletteFile => ""
RETRO:Set resource: VICIIExternalPalette => 1
RETRO:Set resource: VICIIFilter => 1
RETRO:Missing name for system file.
RETRO:Set resource: VICIIPALBlur => 0
RETRO:Set resource: VICIIPALOddLinePhase => 0
RETRO:Set resource: VICIIPALOddLineOffset => 0
RETRO:Set resource: VICIIColorGamma => 0
RETRO:Set resource: VICIIColorTint => 0
RETRO:Set resource: VICIIColorSaturation => 0
RETRO:Set resource: VICIIColorContrast => 0
RETRO:Set resource: VICIIColorBrightness => 0
RETRO:Set resource: UserportDevice => 3
RETRO:Set resource: AutostartWarp => 0
RETRO:Set resource: VirtualDevice4 => 0
RETRO:Set resource: VirtualDevice8 => 0
RETRO:Set resource: VirtualDevice9 => 0
RETRO:Set resource: Drive8TrueEmulation => 1
RETRO:Set resource: Drive9TrueEmulation => 1
RETRO:Set resource: AttachDevice8d0Readonly => 0
RETRO:Set resource: AttachDevice8d1Readonly => 0
RETRO:Set resource: EasyFlashWriteCRT => 0
RETRO:Set resource: DriveSoundEmulation => 0
RETRO:Set resource: DatasetteSound => 0
RETRO:Set resource: VICIIAudioLeak => 0
RETRO:Set resource: SFXSoundExpander => 0
RETRO:Set resource: SidEngine => 0
RETRO:Set resource: SidModel => 0
RETRO:Set resource: SidResidSampling => 0
RETRO:Set resource: SidResidPassband => 0
RETRO:Set resource: SidResidGain => 0
RETRO:Set resource: SidResidFilterBias => 0
RETRO:Set resource: SidResid8580Passband => 0
RETRO:Set resource: SidResid8580Gain => 0
RETRO:Set resource: SidResid8580FilterBias => 0
RETRO:Set resource: SidStereo => 0
RETRO:Set resource: REU => 0
RETRO:Set resource: Printer4 => 0
RETRO:Arg0: x64
RETRO:Arg1: connection-8580.prg
RETRO:AUTOSTART: Autodetecting image type of 'connection-8580.prg'.
RETRO:Filesystem Image Probe: Import GCR: Unknown GCR image version 48.
RETRO:Filesystem Image: Unknown disk image 'connection-8580.prg'.
RETRO:Tape: Cannot open file 'connection-8580.prg'
RETRO:no CRT header found.
RETRO:CART: '/Users/sasq/projects/demotv/connection-8580.prg' is not a valid CRT file.
RETRO:AUTOSTART: Loading PRG file 'connection-8580.prg' with direct RAM injection.
RETRO:AUTOSTART: Resetting the machine to autostart '*'
RETRO:AUTOSTART: 'connection-8580.prg' recognized as program/p00 file.
RETRO:Image for autostart: 'connection-8580.prg'
RETRO:Main CPU: RESET.
RETRO:Sound: Opened device 'retro', speed 0Hz, fragment size infms, buffer size infms, stereo
RETRO:Unit 8: RESET.
RETRO:Sound: Closing device 'retro'
RETRO:Sound: Opened device 'retro', speed 0Hz, fragment size infms, buffer size infms, stereo
RETRO:AUTOSTART: Autodetecting image type of 'connection-8580.prg'.
RETRO:Filesystem Image Probe: Import GCR: Unknown GCR image version 48.
RETRO:Filesystem Image: Unknown disk image 'connection-8580.prg'.
RETRO:Tape: Cannot open file 'connection-8580.prg'
RETRO:no CRT header found.
RETRO:CART: '/Users/sasq/projects/demotv/connection-8580.prg' is not a valid CRT file.
RETRO:AUTOSTART: Loading PRG file 'connection-8580.prg' with direct RAM injection.
RETRO:AUTOSTART: Resetting the machine to autostart '*'
RETRO:AUTOSTART: 'connection-8580.prg' recognized as program/p00 file.
RETRO:Main CPU: RESET.
RETRO:Unit 8: RESET.
RETRO:AUTOSTART: Injecting program data at $0801 (size $24da)
RETRO:AUTOSTART: Ready
RETRO:AUTOSTART: Starting program.
RETRO:AUTOSTART: Restoring FileSystemDevice8 to 1.
RETRO:AUTOSTART: Restoring FSDevice8ConvertP00 to 1.
RETRO:AUTOSTART: Restoring FSDeviceLongNames to 1.
RETRO:AUTOSTART: Done.

[sasq64]

Also logging program counter to see that its not just stuck in the kernal

[sasq64]

Doing this in the video callback to check for pixels;

    void video_refresh(void const* data, unsigned width, unsigned height, size_t pitch)
    {
          uint32_t total = 0;
          auto*ptr = (uint8_t*)data;
          for(int i=0; i<(width * height * 4); i += 4) {
              total += ptr[i] + ptr[i+1] + ptr[i+2] + ptr[i+3];
          }
          if (total != 0) {
              printf("PIXELS: %x\n", total);
          }   
       }

[sonninnos]

I'm not getting whatever this is, not with my current config and not with a fresh config:

RETRO:Missing name for system file.

[sasq64]

vice_opt.ExternalPalette is the empty string for some reason, so it tries to load it.
But I fixed that so it is "default" instead. The warnings go away but the same result.

It does kind of seem like the C64 emulation actually produces a black screen, so maybe something is wrong with the machine setup (kernal, basic ?) But emulation doesn't crash, Program Counter is jumpin between Exxx and 08xx for instance.