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Simplified the I/O registration function, added support for Panel debugger messages, and added some new Panel behavior on the RESET instruction

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This commit is contained in:
Jeff 2016-11-15 10:05:25 -08:00 • committed by Jeff Parsons
commit 5bc0c8cca9
12 changed files with 327 additions and 246 deletions
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9
modules/pdp11/lib/rom.js
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@ -65,7 +65,7 @@ if (NODE) {
*/
function ROMPDP11(parmsROM)
{
Component.call(this, "ROM", parmsROM, ROMPDP11);
Component.call(this, "ROM", parmsROM, ROMPDP11, MessagesPDP11.ROM);
this.abInit = null;
this.aSymbols = null;
@ -289,11 +289,16 @@ ROMPDP11.prototype.addROM = function(addr)
* of the IOPAGE address space, by installing I/O handlers for the entire range that return the corresponding
* bytes of the current ROM image on reads, and ignore any writes (which I'm only assuming is how a typical
* ROM "device" deals with writes; if we remove the write handler, then writes will fault).
*
* TODO: It would be more efficient if we parsed ROM data as words rather than bytes, and then installed
* only word handlers instead of only byte handlers. It was done this way purely for historical reasons (ie,
* because that's how other PCjs machines parse their ROMs). For now, all this means is that executing code
* out of ROM will be slower than out of RAM -- although that's often true in the real world as well.
*/
var IOTable = {
[addr]: [ROMPDP11.prototype.readROMByte, ROMPDP11.prototype.writeROMByte, null, null, null, this.sizeROM >> 1]
};
if (this.bus.addIOTable(this, IOTable, MessagesPDP11.ROM, this.idComponent)) {
if (this.bus.addIOTable(this, IOTable)) {
this.fRetainROM = true;
return true;
}