Closed misterjbam closed 11 months ago
harbaum
commented
11 months ago The TOS version doesn't matter.
So you get an empty OSD even with a few .st files on the card?
What do the LEDs on the Tang Nano show? The two closer to the USB connector are floppy a and b activity. But in your case the other 4 are more important. They show the SD card state. What do these show?
Also how big is your SD card?
misterjbam
commented
11 months ago Yes the OSD menu is empty despite the presence of .st file on the SD.
tested with a 2GB card, an 8GB card and a 16GB card
For the LEDs (1 is closest to the USB) Led 1: Lit at startup, then on the TOS, flashes very quickly and is very weak) Led 2: off at startup, then on the TOS, flashes very quickly and is very weak) Led 3: off Led 4: off Led 5: off Led 6: is constantly lit.
https://drive.google.com/file/d/1l5jITqeZzx7N-RZR5YAh1w7NnZEl77kq/view?usp=sharing
harbaum
commented
11 months ago I assume that LEDs 3 to 5 are all lit for a short moment on startup? So it seems that your card's low level init worked. But the file system cannot be read.
The weak flashing of LEDs 1 and 2 is also correct. All Atari STs do that with their floppies and on a real machine the flashing is the same.
Do you have a Linux box? And a card reader? Assuming your sd card shows up as /dev/sdb, please do this:
$ sudo file -s /dev/sdb
/dev/sdb: DOS/MBR boot sector; partition 1 : ID=0xc, start-CHS (0x1,0,1), end-CHS (0x35f,63,32), startsector 2048, 31127552 sectors, extended partition table (last)This tells us that there's one partition. So then please do:
sudo file -s /dev/sdb1
/dev/sdb1: DOS/MBR boot sector, code offset 0x58+2, OEM-ID "mkfs.fat", sectors/cluster 64, reserved sectors 64, Media descriptor 0xf8, sectors/track 32, heads 64, hidden sectors 2048, sectors 31127552 (volumes > 32 MB), FAT (32 bit), sectors/FAT 3840, serial number 0x2361ebc8, label: "ATARI ST "And this partition can be mounted and has the files:
sudo mount /dev/sdb1 /mnt/
ls /mnt/
ATB.st disk_a.st
$ sudo umount /mnt Something must be fundamentally different with your cards.
misterjbam
commented
11 months ago Thanks for your help . here are the results I got
sudo file -s /dev/sdb /dev/sdb: DOS/MBR boot sector; partition 1 : ID=0x6, start-CHS (0x4,4,1), end-CHS (0x3ff,254,2), startsector 2048, 8386560 sectors
sudo file -s /dev/sdb1 /dev/sdb1: DOS/MBR boot sector, code offset 0x3c+2, OEM-ID "mkfs.fat", sectors/cluster 128, reserved sectors 128, root entries 2048, Media descriptor 0xf8, sectors/FAT 256, sectors/track 62, heads 246, hidden sectors 2048, sectors 8386554 (volumes > 32 MB), serial number 0x3b7dee0c, label: "TANG ", FAT (16 bit)
misterjbam
commented
11 months ago yeahhhhhhh that's good, it works
the problem came from the size of the clusters: 64kb
a huge thank you
harbaum
commented
11 months ago the problem came from the size of the clusters: 64kb
128 sectors per Cluster should have worked. But I never tested that. I'll take a look at that.
Even your 4GB card used that many sectors per Cluster? That's surprising. On smaller cards the clusters are usually also smaller.
Although I tried with several different SD cards, I was never able to get a floppy disk to work. no floppy disk is displayed in the menu and no boot from floppy disk. I tested with several different SDs all in FAT (formatted under Windows and Linux), I even tested in FAT32. I tested with the last 3 cores and also with 2 different TOS. Tested by putting only DISK_A.ST on the SD and putting multiple files. I can't get it to recognize a floppy disk. My SD drive works fine with Nestang so that's not the problem.