Feature drv1571burst #20
Open
Conversation
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
added 15 commits
March 11, 2024 23:58
… other code and docs
…ue INQUIRE DISK and read back status byte afterwards
Contributor
Author
|
I'm dumb - this can be twice as fast as BSW code. I could notice that only when using track caching on expanded 1571 (https://github.com/ytmytm/1571-TrackCacheROM). Simply put - when testing on original disks it does nothing because sector interleave is suboptimal. What is gained on transfer speed it lost on waiting for the next sector in the chain. Now to figure out the optimal interleave value here. |
…tps://plus4world.powweb.com/forum/50537 Acknowledge transfer *only* after data was read. Imagine that between handshake and LDA cia1Data a badline occurs - new byte will arrive in that time. BSZ wrote more on this in https://plus4world.powweb.com/forum/50537
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
1 participant
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
This is a 1571 driver meant only for
VARIANT=bsw128which uses native Burst Command Instruction Set (see chapter 10 of 1571 User's Guide).The speed is comparable to the BSW driver, but the drive is not running speed code, so
EnterTurbo/ExitTurbocalls do nothing and there is no need to reset the drive.I put it on hold in March 2002 just to complete now.