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Asynchronous Multiplexer and Console Support

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scp.c, scp.h, sim_defs.h
     - Added commands:
          SHOW MULTIPLEXER (MUX)
          SHOW TIMERS
     - Added facilities/APIs:
          sim_activate_after - time specific event scheduling (vs instruction scheduling) API visible, optional separate thread implementation in a later revision
     - Changed Commands:
          SET CONSOLE DEBUG no longer affects global debugging, but merely debugging for the console subsystem.  Use SET DEBUG and SET NODEBUG to affect global debugging.
     - Added Asynchronous polling support

sim_tmxr.h, sim_tmxr.c
     - Added Asynchronous capabilities to the multiplexer subsystem to avoid polling for input and to deliver input data instantly when it arrives instead of delaying for up to one or more full simulated clock ticks.
     - Added debug trace support
     - Added statistic tracking of total bytes transmitted on each line
     - Added more aggressive attempts to flush transmit buffers when they fill before dropping tranmitted characters
     - Fixed status return of tmxr_putc_ln to return SCPE_LOST if the transmitting line isn't connected or buffered.

sim_console.h, sim_console.c
     - Fixed issue where connections to console telnet sessions would succeed for the first connection, but hang indefinitely for additional connects without rejecting due to all lines being busy.  This is handled by using an internal device and unit to hang the required polling on.  Connection polls happen once per second.
     - Added console debugging/trace support.
     - Added Asynchronous capabilities to the console subsystem to avoid polling for input and to deliver input data instantly when it arrives instead of delaying for up to one or more full simulated clock ticks.
     - Added tmxr_set_console_input_unit() API to support asynchronous simulator console I/O

sim_timer.h, sim_timer.c
     - Added SHOW TIMERS support
     - Added mechanism to capture the timer the simulator uses for its clock tick and make this timer globally available for other uses

PDP11/pdp11_dz.c
     - Added debug trace support

PDP11/pdp11_vh.c
     - Added debug trace support
     - Changed timing mechanisms to not assume that the count unit service routine calls measures the passage of time, and created a separate unit to measure time.

VAX/vax_stddev.c
     - Added call to tmxr_set_console_input_unit to leverage Asynchronous console I/O
This commit is contained in:
Mark Pizzolato
2012-05-12 13:42:44 -07:00
parent e3bdb12aeb
commit 7c38b83d7c
13 changed files with 1242 additions and 166 deletions
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4
PDP11/pdp11_dz.c
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@@ -163,12 +163,14 @@ TMXR dz_desc = { DZ_MUXES * DZ_LINES, 0, 0, dz_ldsc }; /* mux descriptor */
/* debugging bitmaps */
#define DBG_REG 0x0001 /* trace read/write registers */
#define DBG_INT 0x0002 /* display transfer requests */
#define DBG_TRC TMXR_DBG_TRC /* trace routine calls */
#define DBG_XMT TMXR_DBG_XMT /* display Transmitted Data */
#define DBG_RCV TMXR_DBG_RCV /* display Received Data */
DEBTAB dz_debug[] = {
{"REG", DBG_REG},
{"INT", DBG_INT},
{"TRC", DBG_TRC},
{"XMT", DBG_XMT},
{"RCV", DBG_RCV},
{0}
@@ -421,6 +423,8 @@ t_stat dz_svc (UNIT *uptr)
{
int32 dz, t, newln;
sim_debug(DBG_TRC, find_dev_from_unit(uptr), "dz_svc()\n");
for (dz = t = 0; dz < DZ_MUXES; dz++) /* check enabled */
t = t | (dz_csr[dz] & CSR_MSE);
if (t) { /* any enabled? */