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Perform the documented encoding of SIXBIT character data for MACRO-10

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Jeff 2017-03-12 11:56:15 -07:00 • committed by Jeff Parsons
commit 9ac0ffe679
11 changed files with 20 additions and 12 deletions
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10
modules/pdp10/lib/macro10.js
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@ -565,7 +565,7 @@ class Macro10 {
/**
* genASCII()
*
* Based on the last operator, generate the appropriate ASCII data.
* Based on the last operator, generate the appropriate ASCII/ASCIZ/SIXBIT data.
*
* @this {Macro10}
*/
@ -588,6 +588,14 @@ class Macro10 {
* get zero, so it's all good.
*/
var c = this.sASCII.charCodeAt(i) & 0o177;
/*
* If we're doing 6-bit encoding, then perform the conversion of lower-case to upper-case,
* and then adjust/mask.
*/
if (bits == 6) {
if (c >= 0x61 && c <= 0x7A) c -= 0x20;
c = (c + 0o40) & 0o77;
}
w += c * Math.pow(2, shift);
shift -= bits;
n++;