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articles:iicplus_smartport_secrets [2018/06/26 14:41] M.G. [The 3.5 Floppy Format] |
articles:iicplus_smartport_secrets [2018/07/05 15:17] (current) M.G. [The 3.5 Floppy Format] |
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| Unlike the 5.25%%"%% floppy address header, the 3.5%%"%% floppy address header is coded in 6&2 format and can be decoded from the standard nibble table.. E.g. if SS contains $96, the address is for sector 0, if it contains $97, the address is for sector 1. | Unlike the 5.25%%"%% floppy address header, the 3.5%%"%% floppy address header is coded in 6&2 format and can be decoded from the standard nibble table.. E.g. if SS contains $96, the address is for sector 0, if it contains $97, the address is for sector 1. | ||
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| + | The 699 disk bytes encode a 12-byte sector tag + 512 data bytes. | ||
| ===== The 5.25 Floppy Format ===== | ===== The 5.25 Floppy Format ===== | ||
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| ! STA 42,X | ! STA 42,X | ||
| ! DEX | ! DEX | ||
| - | ! BNE 302 | + | ! BPL 302 |
| ! JSR C64E | ! JSR C64E | ||
| ! STA 330 | ! STA 330 | ||