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ID Category [?] Severity [?] Reproducibility Date Submitted Last Update
08012 Graphics Minor Always Jun 21, 2021, 23:15 Jun 26, 2021, 12:08
Tester Atario View Status Public Platform MAME (Official Binary)
Assigned To Pernod Resolution Fixed OS
Status [?] Resolved Driver channelf.cpp
Version 0.232 Fixed in Version 0.233 Build
Fixed in Git Commit c8192c8 Github Pull Request #
Summary MESS-specific 08012: channelf (and clones?): Fairchild Channel F runs at wrong resolution
Description Pernod writes:

"The channelf driver is currently outputting a video resolution of 102x58 which is not correct. The actual hardware duplicates pixels on the x-axis and repeats each scanline 4 times (5 for PAL) in the y-axis to produce an output of 204x232."

"The emulation needs updating to produce the correct resolution."

References:

https://www.mameworld.info/ubbthreads/showflat.php?Cat=&Number=391065&page=0&view=expanded&sb=5&o=&vc=1

https://forums.nesdev.com/viewtopic.php?f=23&t=20475

https://forum.mamedev.org/viewtopic.php?f=14&t=702
Steps To Reproduce Run any Channel F games. Issue becomes very apparent when using scanline effects.
Additional Information
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Regression Version
Affected Sets / Systems channelf (and clones?)
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