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The memory management toggle-in passes (see /devices/pdp11/machine/1170/panel/debugger)

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This commit is contained in:
Jeff 2016-11-02 21:20:04 -07:00 • committed by Jeff Parsons
commit 0afab359ad
7 changed files with 222 additions and 178 deletions
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8
modules/pdp11/lib/bus.js
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@ -93,8 +93,8 @@ function BusPDP11(parmsBus, cpu, dbg)
* For PDPjs machines, the ideal block size is 8Kb (IOPAGE_LENGTH), the size of the IOPAGE on all PDP-11 machines;
* as a result, our IOController functions assume that all incoming offsets are within a single 8Kb block.
*/
this.addrTotal = Math.pow(2, this.nBusWidth);
this.nBusLimit = this.nBusMask = (this.addrTotal - 1) | 0;
this.addrTotal = 1 << this.nBusWidth;
this.nBusLimit = this.nBusMask = (this.addrTotal - 1);
this.nBlockSize = BusPDP11.IOPAGE_LENGTH;
this.nBlockShift = Math.log2(this.nBlockSize); // ES6 ALERT (alternatively: Math.log(this.nBlockSize) / Math.LN2)
this.nBlockLen = this.nBlockSize >> 2;
@ -457,7 +457,9 @@ BusPDP11.prototype.setIOPageRange = function(nRange)
}
if (nRange) {
this.nIOPageRange = nRange;
addr = (1 << nRange) - BusPDP11.IOPAGE_LENGTH;
addr = (1 << nRange);
this.nBusLimit = this.nBusMask = (addr - 1);
addr -= BusPDP11.IOPAGE_LENGTH;
this.prevIOPageBlocks = this.getMemoryBlocks(addr, BusPDP11.IOPAGE_LENGTH);
if (this.realIOPageBlocks) {
this.setMemoryBlocks(addr, BusPDP11.IOPAGE_LENGTH, this.realIOPageBlocks);