MAMEWorld Forums - News - I THINK WE'RE GOOD!

With the help of these ones done so far to find errors in the OCR data I have a ROM where the checksum of the data matches the internal checksum stored in the program. That's a good sign.

The 4000-47ff range isn't covered by the checksum, but given the high confidence at this point I think we're good there too.

> Some months have passed since the last time a collective effort was needed, but now
> we need help to type the data of the internal ROM of a Pacman handheld which was
> recently trojaned out.
> Here are the instructions:
>
> There is an increasing decimal counter on the left (the address)
> To the right of this there is another value (the data) again decimal
>
> for EVEN addresses the data will be displayed near the center of the display
> for ODD addresses the data will be displayed closer to the right of the display
> (this is done to avoid 'half and half values' appearing mid-update)
>
> valid address/data combinations will persist for several frames, so valid frames
> should
> be obvious and transitional frames can be ignored.
>
> the address counter updates slightly before the data updates, don't let this catch
> you out,
> as mentioned above, data for odd addresses will always be display to the right of the
> screen
> so if in doubt you can double check tht way.
>
> data is needed in the format
>
> address, data,
> eg
>
> 016384, 000000,
> 016385, 000000,
> 016386, 000000,
> 016387, 000000,
> 016388, 000000,
> 016389, 016703,
> 016390, 016692,
> 016391, 016441,
> 016392, 016470,
>
> the first digit in each column will always be 0 (these are 16-bit values so highest
> possible value is 065535)
>
> files should be named the same as the video name
> eg. 0_part1_4000_43ff.txt for 0_part1_4000_43ff.mp4
>
> etc.
>
> be sure to familiarize yourself with the different number graphics, they are all
> distinct
> but be careful not to confuse 1 with 7, or 3 with 8 or 0. the address display is
> useful for
> learning the character shapes.
>
> videos starting with the final one here are a bit darker than the first batch,
> although still readable
>
> most of these videos cover a 1024 word range (1kwords) although due to recording
> boundaries some are split smaller.
>
> ideally 2 people should independently do each video, as it makes mistakes more likely
> to be found
>
>
> https://og.kervella.org/pacman/0_part1_4000_43ff.mp4 (1024 words) DONE (Team Europe)
> https://og.kervella.org/pacman/0_part2_4400_47ff.mp4 (1024 words) DONE (Osso)
> https://og.kervella.org/pacman/0_part3_4800_4bff.mp4 (1024 words) DONE (Osso)
> https://og.kervella.org/pacman/0_part4_4c00_4fff.mp4 (1024 words) DONE (Osso)
> https://og.kervella.org/pacman/0_part5_5000_53ff.mp4 (1024 words) DONE (Team Europe)
> https://og.kervella.org/pacman/0_part6_5400_55ff.mp4 (512 words) DONE (Team Europe)
> (display is a bit darker on ones below)
> https://og.kervella.org/pacman/1_part1_5600_57ff.mp4 (512 words) DONE (Team Europe)
> https://og.kervella.org/pacman/1_part2_5800_5bff.mp4 (1024 words) DONE (jrideburg)
> https://og.kervella.org/pacman/1_part3_5c00_5fff.mp4 (1024 words) IN PROGRESS
> (jrideburg)
> https://og.kervella.org/pacman/1_part4_6000_63ff.mp4 (1024 words)
> https://og.kervella.org/pacman/1_part5_6400_67ff.mp4 (1024 words) IN PROGRESS (Team
> Europe)
> https://og.kervella.org/pacman/1_part6_6800_6bff.mp4 (1024 words)
> https://og.kervella.org/pacman/2_part1_6c00_6fff.mp4 (1024 words)
> https://og.kervella.org/pacman/2_part2_7000_73ff.mp4 (1024 words)
> https://og.kervella.org/pacman/2_part3_7400_77ff.mp4 (1024 words)
> https://og.kervella.org/pacman/2_part4_7800_7bff.mp4 (1024 words)
> https://og.kervella.org/pacman/2_part5_7c00_7fff.mp4 (1024 words) DONE (f205v)
> https://og.kervella.org/pacman/2_part6_8000_81ff.mp4 (512 words) DONE (f205v)
> https://og.kervella.org/pacman/3_part1_8200_83ff.mp4 (512 words) DONE (jrideburg)
> https://og.kervella.org/pacman/3_part2_8400_87ff.mp4 (1024 words) DONE 2x (jrideburg
> and Osso)
> https://og.kervella.org/pacman/3_part3_8800_8bff.mp4 (1024 words) DONE (jrideburg)
> https://og.kervella.org/pacman/3_part4_8c00_8dff.mp4 (512 words) (mostly empty) DONE
> (Team Europe)
>
> total 19.5kwords of data
>
> useful technique: use VLC on a separate laptop, hit space to pause / unpause video
> for each value while entering data on PC
>
> If you're interested, please post hereunder which video you are going to tackle, to
> avoid too many people working on the same video and noone working on others.
> Thanks to everyone who'll help to preserve another system in MAME!