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Dan pretty much sums it up. RAWDUMP is simply a dump of the UART stream from reading one track, including all garbage bytes before the start of the track, between sectors, and after the end of the last sector, etc; padded to 2304 bytes/track for a 5.25" disk, and 3840 bytes/track for 8" disks. So as...

Hi Rich, Definitely, I'm interested, and I think once a bootable set (even a 2-disk setup) is available, it will be of general interest. If there's anything I can do to help get your C4P up and running let me know. Does DOS/65 use the OS65D disk routines to produce disks which can be copied by OS65D...

Hi Jeff, I think this is very useful to all of us, and is a big step in the right direction, many thanks. I think it would be really awesome to have an automated tool consisting of a slave program on the OSI that would exchange data between disk sectors / tracks and the host, under control of host c...

I also have some original C1P disks that I prepared using rawdump, going up on the site with other accumulated material when I have a chance.

Dave

Yup, there it is. So it was added on the 540B, which explains why I never encountered it (my system has a 540A). I guess that means that the NMHz version won't work on a C2, which is why it's not on my 65D disks. I somehow missed the note on Mark's site as well. This has been a most interesting thre...

Dave, I no longer have the 540 schematics. If you want, email them to me or attach them to a PM. What I would look for would be something attached to data bus bit 7 only, and not the whole bus, or look at the sync signals and see what they are connected to. Schematics are on the web site: http://os...

Dave, The disk images in the ZIP file attached to this message show what I am talking about. The one called "OS-65D v3.2 (NMHZ)" is (I think) the standard version of that OS. The one called "EdSec5" is the version I modified. (BTW, is .ZIP the ONLY extension that is allowed to be posted here?) Writ...

MK (or is it HAK?), it sounds like you know what you are doing, so I will let you be. Good luck. Dave, the code I was talking about is on track 1 and loads to $2E79 (the track loads starting at $2A00). Look at the standard version, it has LDA $DE00 instructions, followed by BMI or BPL, it is lookin...

Danny, I believe the "NMHZ" versions of OS65D store the timing constant at $267B (inside the 1ms delay routine at $267A). The values are $31 for 1 MHz and $62 for 2 MHz, as you describe. At the moment, I can't remember exactly where this is set, and can't find it in the disassembly file, but I seem ...

At 250 kbps, the read loop is pretty tight for 8" disks. Did you happen to make any modifications that could affect the disk read loop? The other question is, does he have any trouble booting with those disks? Every 5/6 bits seems too regular to be a bad disk, but could be a data rate issue. The 8" ...