atrax27407 Posted February 28, 2021 Share Posted February 28, 2021 Does anyone have copies of either (or both) of these DSRs for the HFDC? I understand that they are flawed but I would like copies of each to complete my HFDC DSR series. Thanks! 2 Quote Link to comment Share on other sites More sharing options...
+Schmitzi Posted February 28, 2021 Share Posted February 28, 2021 sorry, I only have H11-91H, H14, H15, H16 Quote Link to comment Share on other sites More sharing options...
+Schmitzi Posted February 28, 2021 Share Posted February 28, 2021 never seen them Quote Link to comment Share on other sites More sharing options...
+mizapf Posted February 28, 2021 Share Posted February 28, 2021 Is there a list of changes for the DSR variants? Quote Link to comment Share on other sites More sharing options...
atrax27407 Posted March 1, 2021 Author Share Posted March 1, 2021 H14 - changed the head step times to 8ms and 4ms H15 - removed floppy disk access for those with with RAMdisks as DSK4+ (hard drive access only) H16 - Removed hard disk access (floppy access onlt) Quote Link to comment Share on other sites More sharing options...
+mizapf Posted March 1, 2021 Share Posted March 1, 2021 OK, then H11 was not a bad choice if you wanted both floppy and hard disk. I remember that I had some floppy drive issues with the HFDC back in those times, so I used a separate floppy controller. Interesting to see that people could wish to remove the HD support. 1 Quote Link to comment Share on other sites More sharing options...
+Schmitzi Posted March 1, 2021 Share Posted March 1, 2021 wasn´t there any change to the onboard switches with H14 ? I slightly remember this was mentioned before Quote Link to comment Share on other sites More sharing options...
atrax27407 Posted March 1, 2021 Author Share Posted March 1, 2021 Not with the altered DSRs. The changes were made in the EPROM. Except for H14 where the two head step settings (i.e., switches) were substituted for the original when the corresponding switch was used. 1 Quote Link to comment Share on other sites More sharing options...
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