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Post by VDC 8x2 on May 29, 2016 4:51:16 GMT
This is the area to discuss programming drives of types, from tape drives to hard disk, and everything in between.
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Post by hydrophilic on Mar 12, 2017 10:28:42 GMT
I love this topic... I will try to dig-up / consolidate all my info on this topic. I am more into floppy drives, but know enough about tapes and hard drives to be "dangerous"!
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wegi
KIM-1 User
Posts: 35 
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Post by wegi on Sept 14, 2017 16:37:45 GMT
csdb.dk/release/?id=81316That's my old tool for use additional space on the disk on the illegal track's 36/41-42 We can talk about programming drives. I tried still compatibile between 1571/70/1541C/1541 II (1570/71 in single mode (GCR) without MFM of course). Some times like here www.youtube.com/watch?v=Q76ZepI_44Y you can do realtime 3d vertex calculated in drive. Sadly here is 2KB of RAM only. About tape is really little to say. Only ABC turbo. Sometimes people done IRQ tape loaders, but allways tape was very very slow. Even in ABC turbo 
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Post by wsoft on May 11, 2024 18:56:43 GMT
The best thing I ever found in magazines was the one that made it possible to create subdirectories on a 1541 using the "&" file technique and was published in an older "64'er" article from Markt&Technik
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Post by bjonte on May 12, 2024 12:58:31 GMT
The best thing I ever found in magazines was the one that made it possible to create subdirectories on a 1541 using the "&" file technique and was published in an older "64'er" article from Markt&Technik I have never heard about this. How did it work? |
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Post by wsoft on May 14, 2024 0:59:02 GMT
The "&" is a command that only a CBM drive can recognize and if you send its name to a drive it is executed within the drive's memory but it needs a checksum. Essentially, what this particular code did was to re-write the normal directory-track pointers to somewhere else on the disk which made validating the disk impossible (unless you were willing to lose your data). As I remember, there were two such disk commands in that issue. One changed to the (new) subdirectory and the other re-wrote it to its original values. A pretty slick setup if you ask me.
Check the 1541 manual or one of the other ones. Instructions pertaining to how "&" is used should be in there somewhere.
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