sys: more comments

2016-03-11 16:32:11 -05:00
parent 802ab257b9
commit 9372fa5f56
5 changed files with 47 additions and 29 deletions
@@ -141,6 +141,9 @@ copyz: 0
   jmp copyz i			" return
 t = t+1

+	" put queued character
+	" CALLED FROM PI: AVOIDS INDIRECT!!
+	" queue number in AC
 putchar: 0
 "** 01-s1.pdf page 23
   dac 9f+t
@@ -157,6 +160,14 @@ putchar: 0
   jmp putchar i
 t = t+1

+	" get queued character
+	" CALLED FROM PI: AVOIDS INDIRECT!!
+	" queue number in AC:
+	"  1: tty input
+	"  2: tty output
+	"  3: display keyboard
+	"  4: paper tape reader
+	"  5: paper tape punch
 getchar: 0
   jms takeq
      jmp i getchar
@@ -168,6 +179,7 @@ getchar: 0
   isz getchar
   jmp i getchar

+	" CALLED FROM PI: AVOIDS INDIRECT!!
 takeq: 0
   rcl
   tad lacq1