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PDP11, VAX: Support multiplexer input speeds greater than 9600bps for console, DZ, VH, DL and DC devices

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Each of the speeds greater than 9600bps deliver a character in less than
1ms.  Computing inter-character delays in microseconds therefore can't
be precise enough to be well behaved.  Measuring the inter-character
delays in instructions (scalled by the calibrated clock) gets us the needed
precision.
This commit is contained in:
Mark Pizzolato
2015-11-25 04:25:21 -08:00
parent 44ef17f971
commit 62e36241a4
6 changed files with 14 additions and 11 deletions
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2
PDP11/pdp11_dz.c
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@@ -229,7 +229,7 @@ uint16 dz_tcr[MAX_DZ_MUXES] = { 0 }; /* xmit control */
uint16 dz_msr[MAX_DZ_MUXES] = { 0 }; /* modem status */
uint16 dz_tdr[MAX_DZ_MUXES] = { 0 }; /* xmit data */
uint8 dz_sae[MAX_DZ_MUXES] = { 0 }; /* silo alarm enabled */
uint32 dz_wait = SERIAL_IN_WAIT; /* input polling adjustment */
uint32 dz_wait = 1; /* input polling adjustment */
uint32 dz_rxi = 0; /* rcv interrupts */
uint32 dz_txi = 0; /* xmt interrupts */
int32 dz_mctl = 0; /* modem ctrl enabled */

2
PDP11/pdp11_vh.c
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@@ -283,7 +283,7 @@ static uint32 vh_rxi = 0; /* rcv interrupts */
static uint32 vh_txi = 0; /* xmt interrupts */
static uint32 vh_crit = 0;/* FIFO.CRIT */
static uint32 vh_wait = SERIAL_IN_WAIT; /* input polling adjustment */
static uint32 vh_wait = 0; /* input polling adjustment */
static const int32 bitmask[4] = { 037, 077, 0177, 0377 };