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Sync PC8080 Bus changes with PCjs

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This commit is contained in:
Jeff Parsons 2016-05-03 12:53:57 -07:00
commit e2e5ea1b77
4 changed files with 28 additions and 26 deletions
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44
modules/pcjs/lib/bus.js
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@ -378,48 +378,51 @@ Bus.prototype.powerUp = function(data, fRepower)
*/
Bus.prototype.addMemory = function(addr, size, type, controller)
{
var iBlock = addr >>> this.nBlockShift;
while (size > 0 && iBlock < this.aMemBlocks.length) {
var addrNext = addr;
var sizeLeft = size;
var iBlock = addrNext >>> this.nBlockShift;
while (sizeLeft > 0 && iBlock < this.aMemBlocks.length) {
var block = this.aMemBlocks[iBlock];
var addrBlock = iBlock * this.nBlockSize;
var sizeBlock = this.nBlockSize - (addr - addrBlock);
if (sizeBlock > size) sizeBlock = size;
var sizeBlock = this.nBlockSize - (addrNext - addrBlock);
if (sizeBlock > sizeLeft) sizeBlock = sizeLeft;
if (block && block.size) {
if (block.type == type && block.controller == controller) {
/*
* Where there is already a similar block with a non-zero size, we allow the allocation only if:
*
* 1) addr + size <= block.addr (the request precedes the used portion of the current block), or
* 2) addr >= block.addr + block.used (the request follows the used portion of the current block)
* 1) addrNext + sizeLeft <= block.addr (the request precedes the used portion of the current block), or
* 2) addrNext >= block.addr + block.used (the request follows the used portion of the current block)
*/
if (addr + size <= block.addr) {
block.used += (block.addr - addr);
block.addr = addr;
if (addrNext + sizeLeft <= block.addr) {
block.used += (block.addr - addrNext);
block.addr = addrNext;
return true;
}
if (addr >= block.addr + block.used) {
var sizeAvail = block.size - (addr - addrBlock);
if (sizeAvail > size) sizeAvail = size;
block.used = addr - block.addr + sizeAvail;
addr = addrBlock + this.nBlockSize;
size -= sizeAvail;
if (addrNext >= block.addr + block.used) {
var sizeAvail = block.size - (addrNext - addrBlock);
if (sizeAvail > sizeLeft) sizeAvail = sizeLeft;
block.used = addrNext - block.addr + sizeAvail;
addrNext = addrBlock + this.nBlockSize;
sizeLeft -= sizeAvail;
iBlock++;
continue;
}
}
return this.reportError(Bus.ERROR.ADD_MEM_INUSE, addr, size);
return this.reportError(Bus.ERROR.ADD_MEM_INUSE, addrNext, sizeLeft);
}
var blockNew = new Memory(addr, sizeBlock, this.nBlockSize, type, controller);
var blockNew = new Memory(addrNext, sizeBlock, this.nBlockSize, type, controller);
blockNew.copyBreakpoints(this.dbg, block);
this.aMemBlocks[iBlock++] = blockNew;
addr = addrBlock + this.nBlockSize;
size -= sizeBlock;
addrNext = addrBlock + this.nBlockSize;
sizeLeft -= sizeBlock;
}
if (size <= 0) {
if (sizeLeft <= 0) {
/*
* If all addMemory() calls happened ONLY during device initialization, the following code would not
* be necessary; unfortunately, the Video component can add and remove physical memory blocks during video
@ -430,6 +433,7 @@ Bus.prototype.addMemory = function(addr, size, type, controller)
* to warrant it.
*/
this.cpu.flushPageBlocks();
this.status(Math.floor(size / 1024) + "Kb " + Memory.TYPE.NAMES[type] + " at " + str.toHex(addr));
return true;
}
return this.reportError(Bus.ERROR.ADD_MEM_BADRANGE, addr, size);