Apple ][+ (1979)

Features

CPU: MOS 6502 1MHz
Memory: RAM 48kB, 12kB ROM
Screen: 8 colors at 280 x 192, 4-bit color at 40 x 48
Data path: 8-bit
I/O Ports: Composite monitor, Internal Slots (8), Tape recorder In/Out jacks
Keyboard: Full-stroke keyboard
Built In Media: None
OS: DOS 3.2.1 and DOS 3.3
Built In Language: AppleSoft Basic (Microsoft F.P. version)

Usage

MESS emulates the following computers

apple2p [Apple ][+]
apple2jp [Apple ][j+]

For both drivers, MESS supports the emulation with two floppy drives, “slot6disk1” (s6d1) and “slot6disk2” (s6d2), for disk images in one of the following supported formats: .do, .dsk, .bin, .po, .nib

Misc

Invoking the emulator with a floppy disk will boot from that disk. If booting without a floppy, use the RESET key (“F3” in partial keyboard emulation) to get to APPLESOFT.

You can identify the APPLESOFT prompt as ”]”. Lines can be edited from APPLESOFT using the arrow keys or using Escape, then “I” for up, “J” for left, “K” for right, and “M” for down.

Keyboard

These systems require full keyboard emulation to work correctly. At startup, full keyboard emulation mode is enabled by default. Whilst in full keyboard emulation mode, some key associated functionality may be disabled (like the ESC key for EXIT). The keyboard emulation mode is toggled using the “Scroll Lock” key (by default).

RAM options

Different RAM configurations are possible for these systems in MESS. You can switch between them, changing the -ramsize parameter. At command line, you simply have to add -ramsize ram_value, where ram_value can assume one of the following values

16k
32k
48k
64k (default)

History and Trivia

The Apple ][+ is an incrementally improved Apple ][ that was released in 1979.

Most improvements centered around the ROM chip. It featured a floating point BASIC in ROM called APPLESOFT instead of Integer BASIC. It also had an “autostart” capability which caused the machine to boot automatically from attached Disk ][ devices or other peripherals. Bug fixes increased the number of hi-res color to 8 and eliminated the violet and green fringe around characters in text mode.

The emulator for the Apple ][+ includes a disk drive controller in slot two with two Disk ][ drives. This revolutionary controller was probably the first commercial soft-sector 5.25” floppy drive, and was the cheapest ever at the when it shipped at $595.

Minor as these improvements may seem, it greatly increased the desirability of the Apple ][ line and gave a huge boost in sales to the Apple line.

The Apple II+ was sold in Europe as the Apple IIeuroplus which could display video in European PAL format, and had ESC sequences for European letters. It was followed by the Apple 2e.

(info from old-computers.com)

Apple "][", Apple "II", Apple "//" : which is correct?

”][”, “II”, and ”//” tend to be used pretty much interchangeably for any model of Apple II computer, although, practically speaking, there are a few usages which may provoke a correction.

”][” is the original Apple II symbol. It appears on all early II's and II+'s as well as on the Disk ][ drive. It is, easily, the most attractive and distinctive II symbol; but, it is also associated with old Apple II's. The ”//” usage is generally associated with the “c” and newer “e” models.

The generally preferred machine designations are: