Am Donnerstag, 3. Januar 2019, 15:38:49 CET schrieb Gerrit Heitsch: > On 1/3/19 3:15 PM, Francesco Messineo wrote: > > I remember nobody ever tried to find "QD" disks, normal DD 48TPI disks > > were used (albeit I remember good quality brands were purchased > > usually, like 3M, Olivetti). > > When I bought a whole lot of C64, 1541, an Amiga 2000A and some other > stuff in 2011 for 20 Euros total on ebay (those were the days...), the > lot also included about 500 floppy disks. When making D64 images from > them, I came about a few QD disks, so they did exist. > > > There're two different issues on compact cassette: > > 1) different (really much different) magnetic media, type I (Fe2O3, > > iron oxide), Type II (CrO2), type III (FeCr), type IV (metal), these > > media required different equalization and different recording > > currents. Type I are usually very bad sounding and noisy, type IV have > > the best quality, but the recorder really NEEDS to know what type of > > tape it's trying to record into, otherwise you wouldn't get much > > better results, unless maybe a bit less noise if you use a type IV > > tape on a old, low quality recorder. > > Back when Type II was established, the type II tapes had an extra notch > next to the erase control tab and most recorders had a sensor that > detected the type that way. Wasn't something like this also added for > type IV as well? something like this WAS added for 3.5" HD floppies :) (and yes, QD disks are just the same as SD/DD) -- http://hitmen.eu http://ar.pokefinder.org http://vice-emu.sourceforge.net http://magicdisk.untergrund.net I see in C64.h a list of defines. <Wildstar>Received on 2019-01-03 18:00:30
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