View Issue Details
| ID | Project | Category | View Status | Date Submitted | Last Update |
|---|---|---|---|---|---|
| 0000010 | IDE Simulator | [All Projects] General | public | 2021-06-21 17:55 | 2021-07-11 05:10 |
| Reporter | flynnsbit | Assigned To | |||
| Priority | normal | Severity | minor | Reproducibility | always |
| Status | new | Resolution | open | ||
| Platform | x86 | OS | DOS | OS Version | 7.1 / 6.22 |
| Summary | 0000010: Hot disc swap in DOS isn't recognized until disconnecting, accessing the disk, then disk select | ||||
| Description | Using DOS 7.1 (Native DOS) both MSCDEX and SHSUCDX.COM tested OAKCDROM, VIDE, XCDROM.SYS all tested Issue: Mount a CD, run DIR on that CD, Works. run 'disk disconnect' on IDESim then 'disk select new.iso' on IDESim cd D: on dos machine run 'dir' and it is still the old cd contents same process, run 'disk disconnect' on IDESim, then on DOS machine run 'd:' and run a 'dir', let it fail (abort) then on IDESim 'disk select new.iso' and everything works as expected. | ||||
| Steps To Reproduce | So steps: DOS native select a disc read the disc in dos, dir is fine select a new disc read the disc. Is it the old disc or the new one? 'disk disconnect' dir on mounted directory (D:) dos errors, Abort or Fail 'disk select newiso.iso' dir on d: and new disk is mounted and works. | ||||
| Additional Information | Using DOS 7.1 (Native DOS) both MSCDEX and SHSUCDX.COM tested OAKCDROM, VIDE, XCDROM.SYS all tested Issue: Mount a CD, run DIR on that CD, Works. run 'disk disconnect' on IDESim then 'disk select new.iso' on IDESim cd D: on dos machine run 'dir' and it is still the old cd contents same process, run 'disk disconnect' on IDESim, then on DOS machine run 'd:' and run a 'dir', let it fail (abort) then on IDESim 'disk select new.iso' and everything works as expected. I have to do this each time I want to hot swap cds | ||||
| Tags | No tags attached. | ||||
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flynnsbit: is it better if you run "disk remove" rather than "disk disconnect"? Mine is mostly working fine with DOS 6.22. It sometimes takes 5s or so for the OS to realise that the contents have changed. |
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I suspect the 'media changed' error isn't getting reported, so depending on the driver (and host OS, since some just ping) it may or may not seem fine. Hopefully I'll be able to get it fixed this weekend. |
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Please try this firmware, which seems to make OAKCDROM.SYS behave much more nicely, and hopefully will also do so for its friends. dos-mediachange.fw (273,664 bytes) |
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OAKCDROM.SYS does seem to work well. No need for disconnect or removal and the cd swap is working properly. The new version does have a different issue with XCDROM.SYS where the initial boot with a cd attached works well but when you try to swap you will always get Abort, Retry, Fail no matter what until the next reboot. No combination of swapping, removing, disconnecting will fix it. I will run through the other few drivers I have setup to test but all good on the OAKCDROM.SYS front. |
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@drfunkenstein2k: I've e-mailed you. Also making your comment private so spambots don't come across your e-mail address |
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Having debugged it a little, it looks like XCDROM.SYS just has an odd behaviour - MMC-2 ATAPI Implementation Notes (document number 97-118R0) indicates that when an error occurs ('disk changed' counts as such an error) the device should go into CHECK CONDITION for that error until cleared by a REQUEST SENSE (which OAKCDROM.SYS and Windows 95's built in ATAPI driver both do). Instead, XCDROM.SYS just blindly retries the command. I assume some drives clear transient conditions like "disk changed", so it probably works on such devices. The implementation note doesn't actually mention auto-clearing CHECK CONDITIONs, but there might be something I missed in the main specification. I'll try tweaking it to auto-reset but I'm not too worried since it seems to be contrary to the actual spec. |
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Yeah, that makes sense. My intent was more informational on the XCDROM.SYS in case someone brought it up. At this point anyone should be using OAKCDROM.SYS for their retro setups and the IDE Simulator. I tested it on my 386SX, 486DX, and my K6 build. No issues. |
| Date Modified | Username | Field | Change |
|---|---|---|---|
| 2021-06-21 17:55 | flynnsbit | New Issue | |
| 2021-06-23 13:25 | smoobandit | Note Added: 0000078 | |
| 2021-06-24 06:45 | colin | Note Added: 0000080 | |
| 2021-06-25 17:36 | colin | File Added: dos-mediachange.fw | |
| 2021-06-25 17:36 | colin | Note Added: 0000081 | |
| 2021-07-01 00:45 | flynnsbit | Note Added: 0000089 | |
| 2021-07-06 17:12 | colin | Note Added: 0000091 | |
| 2021-07-11 01:26 | colin | Note Added: 0000092 | |
| 2021-07-11 05:10 | flynnsbit | Note Added: 0000093 |
