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Added SerialPort interface to support the passing of flow control signals between machines (only PDP-11 and VT100 for now; PCx86 will come later, after I study how well, or not-so-well, this works with the VT100)

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Jeff Parsons 2016-12-01 11:15:27 -08:00 • committed by Jeff Parsons
commit 6bea7fd0e9
11 changed files with 901 additions and 732 deletions
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46
modules/shared/lib/defines.js
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@ -62,6 +62,51 @@ var MAXDEBUG = false; // this @define is overridden by the Closure Com
*/
var PRIVATE = false; // this @define is overridden by the Closure Compiler (to false) to enable PRIVATE code
/*
* RS-232 DB-25 Pin Definitions, mapped to bits 1-25 in a 32-bit status value.
*
* SerialPorts in PCjs machines are considered DTE (Data Terminal Equipment), which means they should be "virtually"
* connected to each other via a null-modem cable, which assumes the following cross-wiring:
*
* G 1 <-> 1 G (Ground)
* TD 2 <-> 3 RD (Received Data)
* RD 3 <-> 2 TD (Transmitted Data)
* RTS 4 <-> 5 CTS (Clear To Send)
* CTS 5 <-> 4 RTS (Request To Send)
* DSR 6+8 <-> 20 DTR (Data Terminal Ready)
* SG 7 <-> 7 SG (Signal Ground)
* DTR 20 <-> 6+8 DSR (Data Set Ready + Carrier Detect)
* RI 22 <-> 22 RI (Ring Indicator)
*
* TODO: Move these definitions to a more appropriate shared file at some point.
*/
var RS232 = {
RTS: {
PIN: 4,
MASK: 0x00000010
},
CTS: {
PIN: 5,
MASK: 0x00000020
},
DSR: {
PIN: 6,
MASK: 0x00000040
},
CD: {
PIN: 8,
MASK: 0x00000100
},
DTR: {
PIN: 20,
MASK: 0x00100000
},
RI: {
PIN: 22,
MASK: 0x00400000
}
};
/*
* NODE should be true if we're running under NodeJS (eg, command-line), false if not (eg, web browser)
*/
@ -82,6 +127,7 @@ if (NODE) {
global.DEBUG = DEBUG;
global.MAXDEBUG = MAXDEBUG;
global.PRIVATE = PRIVATE;
global.RS232 = RS232;
global.NODE = NODE;
/*
* TODO: When we're "required" by Node, should we return anything via module.exports?