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21 Second Backup V4.1R [2022] |
AKA :
V.G. Data Shack, VG Data Shack
| User rating: | awaiting 8 votes (8 left) |
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Summary
Submitted by Paladin on 9 May 2022
21 Second Backup v2.0R (modified) and v4.1R
-Now works with 1570/1571 (single-sided disks only). Drive types can be mixed.
-REU/GEORAM support. Any size. Reduces swapping. 512kB or more needed for reading in entire 40 track disk in one pass.
-Returns drive head to track 18 when done copy to prevent load issues when head >T35 after reset.
-Fixed up that strange 2nd drive renumbering. No more need to have both drives wired as #8 and they can both be powered on before starting the program. It still works the old way as well if you do have two #8's. |
Summary
Submitted by Paladin on 9 May 2022
Changes to v4.1R only
-Fixed abnormal track handling logic. It can now handle empty and other non-standard tracks without locking up. As a result, the Super and Half-Track Nibblers are actually usable now.
-Replaces any $02 (end-of-track identifier) bytes from the track buffer to prevent premature EOT condition. These could occur due to empty track or other illegal GCR areas on the source.
-Added $d030 turbo mode to speed up track analyzing/processing. |
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