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Eliminate PDP-10 dependencies on the Int36 class (which is now used only for prototyping and command-line testing)

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Jeff 2017-03-07 17:21:59 -08:00 • committed by Jeff Parsons
commit 48792873de
5 changed files with 54 additions and 25 deletions
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24
modules/pdp10/lib/memory.js
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@ -30,7 +30,6 @@
if (NODE) {
var Component = require("../../shared/lib/component");
var Int36 = require("../../shared/lib/int36");
var PDP10 = require("./defines");
var MessagesPDP10 = require("./messages");
}
@ -202,19 +201,28 @@ class MemoryPDP10 {
* @this {MemoryPDP10}
* @param {number} [off] (optional starting word offset within block)
* @param {number} [len] (optional maximum number of words; default is the entire block)
* @param {number} [pattern]
* @param {number} [pattern] (default is zero)
*/
zero(off, len, pattern)
zero(off, len, pattern = 0)
{
var i;
off = off || 0;
pattern = Int36.validate(pattern || 0);
/*
* NOTE: If len happens to be larger than the block, that's OK, because we also bounds-check the index.
* NOTE: If len is larger than the block, that's OK, because we also bounds-check the index.
*/
off = off || 0;
if (len === undefined) len = this.size;
Component.assert(off >= 0 && off < this.size);
for (i = off; len-- && i < this.size; i++) this.writeWordDirect(pattern, off, this.addr + off);
/*
* Although it's expected that most callers will supply unsigned 36-bit values, we're nice about
* converting any signed values to their unsigned (two's complement) counterpart, provided they are
* within the acceptable range. Any values outside that range will be dealt with afterward.
*/
if (pattern < 0 && pattern >= -PDP10.MIN_NEG36) {
pattern += PDP10.WORD_LIMIT;
}
pattern = Math.trunc(Math.abs(pattern)) % PDP10.WORD_LIMIT;
for (var i = off; len-- && i < this.size; i++) this.writeWordDirect(pattern, off, this.addr + off);
}
/**