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PDP8: Changed console input polling to poll for input 500ms has passed

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This commit is contained in:
Mark Pizzolato 2016-09-24 05:02:47 -07:00
parent 0b0f227057
commit 063cec087a
1 changed files with 5 additions and 1 deletions
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6
PDP8/pdp8_tt.c
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@ -95,6 +95,8 @@ DEVICE tti_dev = {
&tti_dib, 0
};
uint32 tti_buftime; /* time input character arrived */
/* TTO data structures
tto_dev TTO device descriptor
@ -179,13 +181,15 @@ t_stat tti_svc (UNIT *uptr)
int32 c;
sim_clock_coschedule (uptr, tmxr_poll); /* continue poll */
if (dev_done & INT_TTI) /* prior character still pending? */
if ((dev_done & INT_TTI) && /* prior character still pending and < 500ms? */
((sim_os_msec () - tti_buftime) < 500))
return SCPE_OK;
if ((c = sim_poll_kbd ()) < SCPE_KFLAG) /* no char or error? */
return c;
if (c & SCPE_BREAK) /* break? */
uptr->buf = 0;
else uptr->buf = sim_tt_inpcvt (c, TT_GET_MODE (uptr->flags) | TTUF_KSR);
tti_buftime = sim_os_msec ();
uptr->pos = uptr->pos + 1;
dev_done = dev_done | INT_TTI; /* set done */
int_req = INT_UPDATE; /* update interrupts */