From b2851be34099b9c3137e5df6fe722a84e47c63e4 Mon Sep 17 00:00:00 2001 From: sidney Date: Tue, 31 Dec 2024 18:20:11 +0100 Subject: [PATCH] Fixed several typos. --- doc/sim65.sgml | 13 +++++++------ 1 file changed, 7 insertions(+), 6 deletions(-) diff --git a/doc/sim65.sgml b/doc/sim65.sgml index 849d6c65c..2b99a6682 100644 --- a/doc/sim65.sgml +++ b/doc/sim65.sgml @@ -246,7 +246,7 @@ running. For each counter, it also provides a 64 bit "latching" register.

When a program explicitly requests a "counter latch" operation by writing any value to the PERIPHERALS_COUNTER_LATCH address ($FFC0), all live registers are simultaneously -copied to the latch registers. They will keep the newly latched value until another latch +copied to the latch registers. They will keep their newly latched values until another latch operation is requested.

The PERIPHERALS_COUNTER_SELECT address ($FFC1) register holds an 8-bit value that @@ -259,7 +259,7 @@ address range. Six values are currently defined: $02: latched IRQ interrupt counter selected. $03: latched NMI interrupt counter selected. $80: latched wallclock time (nanoseconds) selected. -$81: latched wallclock time (split s/ns) selected. +$81: latched wallclock time (split: seconds, nanoseconds) selected.

Values $00 to $03 provide access to the latched (frozen) value of their respective live @@ -276,12 +276,13 @@ Jan 1st, 1970 UTC, at the time of the last latch operation. The low 32 bits of

The two different wallclock-time latch registers will always refer to precisely the same time instant. For some applications, the single 64-bit value measured in nanoseconds will be more convenient, while -for other applications, the split 32/32 bits representations with separate second and nanosecond +for other applications, the split 32/32 bits representation with separate second and nanosecond values will be more convenient.

Note that the definition above, with time elapsed measured since Midnight, Jan 1st, 1970 UTC, is -an approximation, as the implementation depends on the way POSIX definition time, and POSIX does -not account for leap seconds; it falsely assumes that all days are precisely 86400 seconds long. +an approximation, as the implementation depends on the way POSIX definition time. Unfortunately, +POSIX does not account for leap seconds; it incorrectly assumes that all days are precisely 86400 seconds +long.

On reset, PERIPHERALS_COUNTER_SELECT is initialized to zero. If the PERIPHERALS_COUNTER_SELECT register holds a value other than one of the six values described above, all PERIPHERALS_COUNTER_VALUE @@ -302,7 +303,7 @@ Example: volatile uint8_t * CounterLatch = (uint8_t *)0xffc0; volatile uint8_t * CounterSelect = (uint8_t *)0xffc1; -volatile uint32_t * CounterValue = (uint32_t *)0xffc1; +volatile uint32_t * CounterValue = (uint32_t *)0xffc2; static void print_current_counters(void) {