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1. #APPLEWIN COPY II PLUS HOW TO#
2. #APPLEWIN COPY II PLUS SOFTWARE#
3. #APPLEWIN COPY II PLUS MAC#
4. #APPLEWIN COPY II PLUS WINDOWS#

A simple nibble count measures the maximum theoretical capacity of the track, ignoring the required overheads of practical data storage. However in this experiment I didn't use sync bytes, instead relying on the controller sequencer's natural tendency to quickly sync to certain patterns. This includes restrictions on consecutive zeros, and nibbles with trailing zeroes called self-sync bytes. Track capacity is affected by its contents: since MFM clock pulses aren't used, the data written must be carefully chosen in order to synchronize with and be reliably read by the Disk II controller. weaker magnetically induced current in the read head at low speed. Slower speed results in higher data density, but this will be limited by physical parameters such as magnetic (iron oxide) particle density and read/write head characteristics - e.g. (But I can't find a reference for this.)ĭisk II spindle speed can be manually adjusted on Apple's analog controller board between approximately 190 and 320 RPM. The earlier 8-inch drives were 360 RPM, and since the physical media was the same it's likely that 300 RPM was chosen to increase data density on the smaller disks, and perhaps reduce controller throughput for use on early computers that were less powerful and cheaper. The Disk II uses Constant Angular Velocity standardized by Shugart at 300 RPM. Well, according to a little experiment I did. The maximum is 8309 ($2075) nibbles for track 0. Namely,ĭoes the Apple 2 disk utilize CLV ( Constant Linear Velocity) or CAV ( Constant Angular Velocity)?Īssuming the same 4 μs/bit but the other speed type then what would be the maximum number of nibbles stored on an Apple II disk for: Shows track 0 has a whole lot more "space" then track 39. However, since the radius (and therefore the circumference) of the outermost and innermost track differ, shouldn't track 0 be able to hold more bits then track 39? The circumference (C = 2 * π * r) for tracks: (Beneath Apple DOS on page 3-7 briefly mentions 50,000 bits but doesn't provide any details oh this number was calculated.) It is straight forward to see that a track has = 200 ms/revolution * 1000 μs/ms / 4 μs/bit = 50,000 bits / (8 bits/byte) = 6,250 nibbles/track. I've seen 6,250 nibbles given as the (theoretical) maximum number of nibbles on a track (encoded with 6+2) but never an explanation of where this number comes from. Track 39 (roughly) has a radius of 1.5"/2 = ~ 0.75" (Center hole diameter measured at ~1½").Track 0 (roughly) has a radius of 5"/2 = ~ 2.5".Beneath Apple DOS Figure 3.1, shows track zero is the outermost, but sadly doesn't give any dimensions.

This metafilter discussion also mentions this.

#APPLEWIN COPY II PLUS HOW TO#

You may also use an Apple IIGS emulator to run Apple II games - the Apple IIGS had a 95% compatibility with its 8-bits predecessor.ĪppleWin is very easy to use, the following video shows how to run the Oregon Trail, which comes with 2 disks.The Apple 2's disk drive controller and 5¼" floppy disks have the following metrics: Linux users can use the wonderful LinApple.

#APPLEWIN COPY II PLUS MAC#

Mac users can choose between Virtual ][ (not free) and OpenEmulator (OpenSource). Which runs also the Apple II, II+ and IIe.

#APPLEWIN COPY II PLUS WINDOWS#

One alternative for Windows is Agat Emulator, an emulator dedicated to the Agat (a Russian clone of the Apple II),

#APPLEWIN COPY II PLUS SOFTWARE#

The best emulator for Windows users is AppleWin, and OpenSource software which emulates the original Apple II, Apple II+, Apple IIe and some Russian clones. Thus, many emulators have been created and maintained over the years. The Apple II (sometimes written Apple ][) was a very popular machine in the 80s and the early 90s.