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Added 32-bit interfaces to the Memory component

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This commit is contained in:
Jeff Parsons 2015-01-25 14:09:24 -08:00 • committed by jeffpar
commit e0959dc00c
7 changed files with 319 additions and 119 deletions
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36
modules/pcjs/lib/video.js
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@ -1247,9 +1247,21 @@ Card.ACCESS.WRITE.MASK = 0xff00;
* @param {number} off
* @return {number}
*/
Card.ACCESS.readWord = function writeWord(off)
Card.ACCESS.readWord = function readWord(off)
{
return this.readByte(off) | (this.readByte(off+1) << 8);
return this.readByte(off) | (this.readByte(off + 1) << 8);
};
/**
* readLong(off)
*
* @this {Memory}
* @param {number} off
* @return {number}
*/
Card.ACCESS.readLong = function readLong(off)
{
return this.readByte(off) | (this.readByte(off + 1) << 8) | (this.readByte(off + 2) << 16) | (this.readByte(off + 3) << 24);
};
/**
@ -1260,9 +1272,25 @@ Card.ACCESS.readWord = function writeWord(off)
* @param {number} w
*/
Card.ACCESS.writeWord = function writeWord(off, w)
{
Component.assert(!(w & ~0xffff));
this.writeByte(off, w & 0xff);
this.writeByte(off + 1, w >> 8);
};
/**
* writeLong(off, w)
*
* @this {Memory}
* @param {number} off
* @param {number} w
*/
Card.ACCESS.writeLong = function writeLong(off, w)
{
this.writeByte(off, w & 0xff);
this.writeByte(off + 1, (w >> 8) & 0xff);
this.writeByte(off + 2, (w >> 16) & 0xff);
this.writeByte(off + 3, (w >>> 24));
};
/**
@ -1925,10 +1953,10 @@ Card.prototype.setMemoryAccess = function(nAccess)
}
}
if (!this.afnAccess) {
this.afnAccess = [null, Card.ACCESS.readWord, null, Card.ACCESS.writeWord];
this.afnAccess = [null, Card.ACCESS.readWord, Card.ACCESS.readLong, null, Card.ACCESS.writeWord, Card.ACCESS.writeLong];
}
this.afnAccess[0] = fnReadByte;
this.afnAccess[2] = fnWriteByte;
this.afnAccess[3] = fnWriteByte;
this.nAccess = nAccess;
}
};