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+--- Thread: Even more Microbee Tapes have been recovered (/thread-270.html)
Even more Microbee Tapes have been recovered - ChickenMan - 22-01-2021
Thanks to g67wjjk for providing recordings of these tapes and scans of the cassette labels and inserts. Tapes were recorded at 44.1khz and saved as stereo 16bit WAV files. The Left & Right channels were separated and saved as individual mono files. Once the recordings would load error free, they were down-sampled to 16khz and saved as 8bit WAV files to reduce their size considerably but still remain loadable.
A couple of the tapes were able to load directly into ubee512 as an IC or PC85 error free while others needed noise removal, low frequency filter, some both and some needed manual fixing of small sections of the WAV file to enable them to load error free. Within the ZIP file also included is the MWB file in most.
BCOPY2 is a machine code BEE file that loads and executes from 400h (1024) and usefully for copying tapes and saving at either 300 or 1200baud. Extended Turtle also loads and executes at different addresses as its a mixture of Machine code and Basic.
The PRIMUG Public Domain 1 tape has 6 files on side A and 2 on side B and all the WAV and MWB for each side is included in the zip file.
Side A includes
Bcopy2
Spelling Tutor 3
Build an Equation
Camel
Minefields
Odd one Out
Side B includes
Assignment 46
Mugwump
We already have the recordings of DCLONE in the repository but was missing the actual cassette label. The instructions sheet is different to the one we already have in the repository, so both included now.
Snake is a Viper like game and was on a Sony music tape as after the program recording there was some instrumental music tracks and it took a bit of effort to recover the file. On the flip side was a program called Banner and so far I have been unable to recover that one after considerable effort to do so. On the to-do-later list.
So in to MbeeTech Repository in the Microbee/Software/Tapes/Original folder we placed
primug_public_domain_1_side_a.zip
primug_public_domain_1_side_b.zip
cherry_maths_1.wav
extended_turtle_v3.3.wav
snake2.wav
primug_public_domain_1_tape.jpg <-- in Documentation/Pictures/Tapes folder
cherry_maths_1.jpg
dclone.jpg
extended_turtle.jpg
dclone_tape_to_disk_instructions_t2.pdf <-- in Documentation/Articles/Technical folder
RE: Even more Microbee Tapes have been recovered - ChickenMan - 23-02-2021
Thanks to g67wjjk for providing recordings of another 3 Microbee tapes and scans of the cassette labels and inserts. Tapes were recorded at 44.1khz and saved as stereo 16bit WAV files. The Left & Right channels were separated and saved as individual mono files. Once the recordings would load error free, they were down-sampled to 22khz and saved as 8bit WAV files to reduce their size considerably but still remain loadable.
None of the recordings were able to load into a PC85 Microbee without an error originally. But all that was needed was to apply a de-noise filter that then produced error free loading versions. The WAV pattern of Missile Wars is very variable, somewhat crazy, but after noise removal I was surprised it loaded error free. It could not be down-sampled though, only saved as an 8bit WAV file for reliable loading. The 3 games are already in our floppy disk collection.
Also provided were quality scans of the cassette insert and the cassette label. We already had Missile Wars cassette label but is replaced here with a much better quality version.
So in the MbeeTech Repository in the Microbee/Software/Tapes/Original folder we placed
artillery.wav
battleships.wav
missile_wars.wav
artillery.jpg <-- in Documentation/Pictures/Tapes folder
battleships.jpg
missile_wars.jpg <--- replaced