Qaop applet

Qaop is a ZX Spectrum emulator which can be embedded on a page as Java applet, but can also be run as a simple application.

Emulates Speccy 48K.
Good Z80 and screen emulation.
Sound: speaker and AY.
Loads SNA and Z80 snaps.
Loads TAP tapes.
Supports Gzip and ZIP compression.
2× zoom.

Download

Binary: qaop.jar (45k)
Source: qaop-1.4.tar.gz (2011-11-11)

Qaop/Java is released under the GNU GPL licence. If you modify it, don't forget to put the source on the web. It would be also nice if you link back to this page.

Keys

`Shift`,`[`	`Caps Shift` caps shift
`Ctrl`,`Alt`,`]`	`Symbol Shift` symbol shift
`Tab`	`Caps ShiftSymbol Shift` extended mode
`Esc`	`Caps Shift1` edit
`CtrlDel`	reset Spectrum
`F11`	mute
`PgUp`,`PgDn`	change sound volume
`Pause`	toggle pause

HTML example:

<applet name=qaop archive=qaop.jar code=Qaop width=320 height=256>
<param name=load value=demo.tap>
<param name=ay value=1>
</applet>

(Don't forget to upload qaop.jar on the server)

Parameters

The emulator is customizable by following parameters to the applet tag:

`load`	Snapshot (Z80, SNA) or cartridge (ROM) to run, tape (TAP) to autoload.
`tape`	Tape image (TAP).
`rom`	Alternative ROM image.
`if1rom`	Interface 1 ROM image. Device itself is not emulated.
`focus`	Grab focus on start (default 1).
`ay`	Enable AY (default 0).
`muted`	No sound on start (default 0).
`volume`	Volume level (0..100, default 40).
`mask`	Overlay image (eg. tv.png).
`arrows`	Redefine arrow keys.

You may specify file within ZIP using fragment identifier (eg. name.zip#game.tap). Otherwise first suitable file will be selected.

The arrows parameter consists of up to four chars representing keys (in LRUD order). Use lowercase letters for alpha keys, C [Caps Shift], S [Symbol Shift], _ [Space], E [Enter].

Methods

Applet element is extended with following methods accessible from JavaScript:

`reset()`	Reset Spectrum.
`pause(y)`	Pause (true or false).
`load(file)`	Load snapshot or tape.
`tape(file)`	Insert tape (null to remove).
`save()`	Return data URL to current state (Z80 snapshot).
`mute(y)`	Silence (true or false).
`volume() volume(v)`	Get/set volume level (0..100).
`state()`	Emulator state bit 0:paused, 1:loading, 2:muted.
`mask(file)`	Change overlay (pass null to clear).

Mime types

Qaop recognizes following MIME types:

application/zip	ZIP archive
application/x.zx.rom	ROM image
application/x.zx.tap	TAP file
application/x.zx.sna	SNA snapshot
application/x.zx.z80	Z80 snapshot

(append .gz for gzipped variants; Content-Encoding is also recognized)

As a fallback, type recognition based on filename extension is used.