SpartaDOS 3.2 on SDrive2

[pedgarcia]

I have an SDrive2 which I never could boot a SpartaDOS 3.2 with it. Is there a limitation that such device is not compatible with SpartaDOS?

 

I tried the same version with emulators and they work fine. What am I missing?

 

Thanks

 

 

[+Nezgar]

SpartaDOS 3.2 negotiates the ultraspeed protocol with drives, originally the 1050 US Doubler, at a non-configurable 54000bps when engaged. The S-Drive max also supports the ultraspeed protocol, but at a configurable rate, which may be too fast for your system if you haven't done modifications to remove speed limiting capacitors from your computer.

 

I have limited experience with the S-drives, but I have toyed with a configurable highspeed index setting in the bootable menu, try changing the value which might default to something like $06 to something slower like $0A or $10.

[tschak909]

SpartaDOS's high speed code really falls apart at speeds higher than US Doubler's 0x0a divisor. For a contrast, use the high speed code in the U1MB PBI BIOS.

 

-Thom

[TGB1718]

8 hours ago, tschak909 said:

For a contrast, use the high speed code in the U1MB PBI BIOS

Have to differ on that, when I write to SDX floppys on SDrive Max I get constant errors, reading disks is fine.

I just found out (yesterday) if I turn HSIO OFF, the disks are still accessed at high speed, but I don't get any errors.

 

Was thinking about raising a bug report on this

[flashjazzcat]

26 minutes ago, TGB1718 said:

I just found out (yesterday) if I turn HSIO OFF, the disks are still accessed at high speed, but I don't get any errors.

I've noticed that the HSIO code doesn't much care for intermediate divisors with SIO2PC, at least when using SDX (divisor 3 or so, IIRC), despite the fact there are no issues at divisor 0. I checked Hias' original patched OS and behaviour was identical, so it doesn't appear to be a PBI implementation issue.

[pedgarcia]

Thanks all. Changing the value to 0x0a worked, apparently with no errors. As a complete noob, took me a while to understand what HSIO OFF meant, but I think I've got it. Doing that, the SPX disk actually booted two, but since the other value also did, I will stick with that.

 

Cheers!