pedgarcia Posted January 29, 2020 Share Posted January 29, 2020 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 Quote Link to comment Share on other sites More sharing options...
+Nezgar Posted January 29, 2020 Share Posted January 29, 2020 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. Quote Link to comment Share on other sites More sharing options...
tschak909 Posted January 29, 2020 Share Posted January 29, 2020 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 Quote Link to comment Share on other sites More sharing options...
TGB1718 Posted January 29, 2020 Share Posted January 29, 2020 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 Quote Link to comment Share on other sites More sharing options...
flashjazzcat Posted January 29, 2020 Share Posted January 29, 2020 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. 1 Quote Link to comment Share on other sites More sharing options...
pedgarcia Posted January 30, 2020 Author Share Posted January 30, 2020 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! 2 Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.