Conversion from P64 to G64 is broken #1

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opened 2020-10-03 20:32:53 +00:00 by markusC64 · 3 comments

markusC64 commented

2020-10-03 20:32:53 +00:00

(Migrated from github.com)

Conversion from P64 to G64 is broken. With the attached example, the first 17 tracks get a read error.

td.p64.zip

for reference, I also attached the g64 that has been converted with my new beta of g64conv in combination with p64sync.

td.p64.convertedTo.g64.zip

Comparing the output of micro64disktool with that g64 shows that tracks 1 to 17 are stripped, many bits are missing.

Edit: One remark: Some syncs are made 1 bit longer in my g64 such track length in bits is a multiple of 8 (required by g64 format).

Conversion from P64 to G64 is broken. With the attached example, the first 17 tracks get a read error. [td.p64.zip](https://github.com/BeRo1985/micro64disktool/files/5322283/td.p64.zip) for reference, I also attached the g64 that has been converted with my new beta of g64conv in combination with p64sync. [td.p64.convertedTo.g64.zip](https://github.com/BeRo1985/micro64disktool/files/5322286/td.p64.convertedTo.g64.zip) Comparing the output of micro64disktool with that g64 shows that tracks 1 to 17 are stripped, many bits are missing. Edit: One remark: Some syncs are made 1 bit longer in my g64 such track length in bits is a multiple of 8 (required by g64 format).

Zibri commented

2020-10-22 13:20:44 +00:00

(Migrated from github.com)

Same here.
converting a c64 formatted P64 created in VICE, does not converto to g64. produces nothing.
also 0 byte log if dumping the same p64 image.

To create such image download the latest version of VICE from here: https://mega.nz/folder/Xw8GiKxR#hl2BIeqgBwWYXRsILADDwQ

Then create an empty P64 image and then format it using the emulator:
open15,8,15,"n:empty,d1":close15
then try to convert it to g64 or dump it.
no joy :(

Same here. converting a c64 formatted P64 created in VICE, does not converto to g64. produces nothing. also 0 byte log if dumping the same p64 image. To create such image download the latest version of VICE from here: https://mega.nz/folder/Xw8GiKxR#hl2BIeqgBwWYXRsILADDwQ Then create an empty P64 image and then format it using the emulator: open15,8,15,"n:empty,d1":close15 then try to convert it to g64 or dump it. no joy :(

markusC64 commented

2020-10-22 13:54:00 +00:00

(Migrated from github.com)

How did you test that?

I have done what you suggested. I got a p64 file from vice. micro64disktool converted it to g64 with the described problem.
Another problem is that nibconv cannot deal with that g64 file. That is because it has an uncommon but valid header. nibconv does not like every valid g64 file.

Well, no problem, there is my g64conv tool - it can handle such images.

BTW:
p64conv empry-vice.p64 empry-vice.p64.txt
g64conv empry-vice.p64.txt empry-vice.g64 sstd

using g64conv beta does convert the image without any bug - overriding speedzone detection with default speed zones. For standard disks, speed zone detection has no benefit.

How did you test that? I have done what you suggested. I got a p64 file from vice. micro64disktool converted it to g64 with the described problem. Another problem is that nibconv cannot deal with that g64 file. That is because it has an uncommon but valid header. nibconv does not like every valid g64 file. Well, no problem, there is my g64conv tool - it can handle such images. BTW: p64conv empry-vice.p64 empry-vice.p64.txt g64conv empry-vice.p64.txt empry-vice.g64 sstd using g64conv beta does convert the image without any bug - overriding speedzone detection with default speed zones. For standard disks, speed zone detection has no benefit.

Zibri commented

2020-10-24 13:52:30 +00:00

(Migrated from github.com)

thanks I didn't know about those two... will check immediately