TransEra 641-RTC: Difference between revisions

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{{Plugin Sidebar
|manufacturer=TransEra
|type=641RTC
|summary=Real Time Clock
|series=4051
|image=TransEra_641RTC_03.jpg
|caption=TransEra 641RTC
|introduced=(?)
|discontinued=(?)
|manuals=
* Manual needed, ''please add''  [[Category:Manual needed]]
{{ROM Images}}
* [[Media:TransEra-641-RTC-1978.bin|Original Firmware revision 1978]]
* [[Media:TransEra-641-RTC-1984.bin|Original Firmware revision 1984]]
* [[Media:TE-rtc-641_y2k.bin|1984 Firmware modified for Y2K compatibility]]
}}
The TransEra '''641 Real Time Clock ROM Pack''' (641-RTC) is a ROM pack for the [[4051]] microcomputer.  
The TransEra '''641 Real Time Clock ROM Pack''' (641-RTC) is a ROM pack for the [[4051]] microcomputer.  


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|-
|-
! Command
! Command
! Rev 1
! Rev 2
! Description
! Description
|-
|-
! CALL "TIMESET", T
! CALL "TIMSET", T
| Sets the actual time. T must be a floating point number containing the count of seconds + fraction since the 01-01 of the current year.<br/>The resolution is 1/128 of a second
| yes
| yes
| Sets the actual time. T must be a floating point number containing the count of seconds + fractions since the 01-01 of the current year.<br/>The resolution is 1/128 of a second.
|-
|-
! CALL "TIMSET",T$
! CALL "TIMSET",T$
| yes
| yes
| Sets the actual date & time. T$ must be a string in the format "MM-DD-YY HH:MM:SS".<br/>The time must be always given in 24h format.
| Sets the actual date & time. T$ must be a string in the format "MM-DD-YY HH:MM:SS".<br/>The time must be always given in 24h format.
|-
|-
! CALL "TIME",T
! CALL "TIME",T
| Returns the actual time. The result T is a floating point number and contains the count of seconds since the 01-01 of the current year.<br/>The resolution is 1/128 of a second
| yes
| yes
| Returns the actual time. The result T is a floating point number and contains the count of seconds since 01-01 of the current year.<br/>The resolution is 1/128 of a second.
|-
|-
! CALL "TIME",T$
! CALL "TIME",T$
| Returns the actual date & time. T$ contains a string in the format "WEK MM DD YY HH:MM:SS (AM/PM)".<br/>The string is formatted depending on previous calls of 24HOUR or 12HOUR.<br/>Examples:<br/>MON 07 MAR 21 4:15:20 PM<br/>MON 07 MAR 21 16:15:20<br/>
| yes
| yes
| Returns the actual date & time.<br/>
rev1:<br/>
T$ contains a string in the format "MM DD YY HH:MM:SS".<br/>
The string always contains the time in the 24 hour format.<br/>
Examples:<br/>
07 MAR 21 4:15:20<br/>
07 MAR 21 16:15:20<br/>
rev2:<br/>
T$ contains a string in the format "WEK MM DD YY HH:MM:SS [AM/PM]".<br/>
The string is formatted depending on previous calls of 24HOUR or 12HOUR.<br/>
Examples:<br/>
MON 07 MAR 21 4:15:20 PM<br/>
MON 07 MAR 21 16:15:20<br/>
As with most 4050 RTC modules this revision of the 641-RTC is not [[Year 2000 problem|Y2K]] compatible. So in this example the weekday of march, 7th, 1921 is returned.
|-
|-
! CALL "CLOCK",T$
! CALL "CLOCK",T$
| Same as "TIME",T$
| no
| yes
| Same as "TIME",T$ and "TIME",T
|-
|-
! CALL "PAUSE",T
! CALL "PAUSE",T
| Pauses the Program for T seconds. The parameter T must be an integer value.<br/>The maximum delay is 65535 seconds (~18hours)
| yes
| yes
| Pauses the Program for T seconds. The parameter T must be an integer value.<br/>The maximum delay is 65535 seconds (~18hours)<br/>After the pause the program execution starts at the next line.
|-
|-
! CALL "TIMER",T,L
! CALL "TIMER",T,L
| yes
| yes
| Starts an asynchronous timer with the delay T and jumps to line L when the timer is done.<br/>The maximum delay is 65535 seconds (~18hours).<br/>The timer is not retriggered automatically.
| Starts an asynchronous timer with the delay T and jumps to line L when the timer is done.<br/>The maximum delay is 65535 seconds (~18hours).<br/>The timer is not retriggered automatically.
|-
|-
! CALL "12HOUR"
! CALL "12HOUR"
| no
| yes
| Sets the format of the returned time strings to 12-hour format.<br/>This is the default time format after a power-cycle.
| Sets the format of the returned time strings to 12-hour format.<br/>This is the default time format after a power-cycle.
|-
|-
! CALL "24HOUR"
! CALL "24HOUR"
| no
| yes
| Sets the format of the returned time strings to 24-hour format.
| Sets the format of the returned time strings to 24-hour format.
|}
|}


==Curiosity==
==Revisions==
The external power supply only "protects" and updates the count of seconds within the current year. The year information is stored somewhere in the normal RAM of the 4051 and is lost after a power-cycle.
At least 3 revisions were released.  


The first version came without a battery, so all time information was lost after a power cycle.


==Second Revision==
The second revision added a battery for counting the seconds within the year, but the year information was still unprotected.  
The manual of the [[TransEra 741-RTC]] explicitly talks about a 741 and 641 with identical command set. The command set differs from the command set of the unit shown on this page. So a second revision of the 641 should exist.


The manual of the [[TransEra 741-RTC]] explicitly talks about a 741-RTC and a 641-RTC with identical command set. The command set in the manual differs from the command set of the units shown on this page.
Therefore, a third hardware revision of the 641 is presumed to exist.


===Pictures===
===Pictures revision 1===


<gallery>
<gallery>
TransEra_641RTC_01.jpg
TransEra_641RTC_07.jpg|Label view
TransEra_641RTC_02.jpg
TransEra_641RTC_10.jpg|Top view of PCB
TransEra_641RTC_03.jpg
TransEra_641RTC_11.jpg|Bottom view of PCB
TransEra_641RTC_04.jpg
TransEra_641RTC_05.jpg
</gallery>
</gallery>


===Schematic===
===Pictures revision 2===
 
<gallery>
<gallery>
TransEra_641RTC_schematic.pdf
TransEra_641RTC_02.jpg|Label view - Note: The first "TIMSET"-CALL is misspelled.
TransEra_641RTC_03.jpg|Front view
TransEra_641RTC_04.jpg|Top view of PCB
TransEra_641RTC_05.jpg|Bottom view of PCB
TransEra_641RTC_schematic.pdf|Schematic of revision 2
</gallery>
 
===Pictures revision 3===
 
<gallery>
Image needed.jpg
</gallery>
</gallery>


===Firmware (uploaded BIN files) ===
{| class="wikitable sortable"
! style="text-align: left" | Part number
! Location
|-
| [[Media:TransEra-641-RTC-1984.bin|TransEra-641-RTC-1984.bin]] ([[:TransEra-641-RTC-1984.bin#filehistory|?]]) ||
|}
[[Category:ROM packs]]
[[Category:ROM packs]]

Latest revision as of 03:41, 2 October 2023

TransEra 641RTC
Real Time Clock
TransEra 641RTC

Compatible with 4051

Produced from (?) to (?)

Manuals
  • Manual needed, please add
ROM Images
File Pos. Checksum
(All manuals in PDF format unless noted otherwise)
Manuals – Specifications – Links – Pictures

The TransEra 641 Real Time Clock ROM Pack (641-RTC) is a ROM pack for the 4051 microcomputer.

Command set

Command Rev 1 Rev 2 Description
CALL "TIMSET", T yes yes Sets the actual time. T must be a floating point number containing the count of seconds + fractions since the 01-01 of the current year.
The resolution is 1/128 of a second.
CALL "TIMSET",T$ yes yes Sets the actual date & time. T$ must be a string in the format "MM-DD-YY HH:MM:SS".
The time must be always given in 24h format.
CALL "TIME",T yes yes Returns the actual time. The result T is a floating point number and contains the count of seconds since 01-01 of the current year.
The resolution is 1/128 of a second.
CALL "TIME",T$ yes yes Returns the actual date & time.

rev1:
T$ contains a string in the format "MM DD YY HH:MM:SS".
The string always contains the time in the 24 hour format.
Examples:
07 MAR 21 4:15:20
07 MAR 21 16:15:20
rev2:
T$ contains a string in the format "WEK MM DD YY HH:MM:SS [AM/PM]".
The string is formatted depending on previous calls of 24HOUR or 12HOUR.
Examples:
MON 07 MAR 21 4:15:20 PM
MON 07 MAR 21 16:15:20
As with most 4050 RTC modules this revision of the 641-RTC is not Y2K compatible. So in this example the weekday of march, 7th, 1921 is returned.

CALL "CLOCK",T$ no yes Same as "TIME",T$ and "TIME",T
CALL "PAUSE",T yes yes Pauses the Program for T seconds. The parameter T must be an integer value.
The maximum delay is 65535 seconds (~18hours)
After the pause the program execution starts at the next line.
CALL "TIMER",T,L yes yes Starts an asynchronous timer with the delay T and jumps to line L when the timer is done.
The maximum delay is 65535 seconds (~18hours).
The timer is not retriggered automatically.
CALL "12HOUR" no yes Sets the format of the returned time strings to 12-hour format.
This is the default time format after a power-cycle.
CALL "24HOUR" no yes Sets the format of the returned time strings to 24-hour format.

Revisions

At least 3 revisions were released.

The first version came without a battery, so all time information was lost after a power cycle.

The second revision added a battery for counting the seconds within the year, but the year information was still unprotected.

The manual of the TransEra 741-RTC explicitly talks about a 741-RTC and a 641-RTC with identical command set. The command set in the manual differs from the command set of the units shown on this page. Therefore, a third hardware revision of the 641 is presumed to exist.

Pictures revision 1

  • Label view

    Label view

  • Top view of PCB

    Top view of PCB

  • Bottom view of PCB

    Bottom view of PCB

Pictures revision 2

  • Label view - Note: The first "TIMSET"-CALL is misspelled.

    Label view - Note: The first "TIMSET"-CALL is misspelled.

  • Front view

    Front view

  • Top view of PCB

    Top view of PCB

  • Bottom view of PCB

    Bottom view of PCB

  • Schematic of revision 2

    Schematic of revision 2

Pictures revision 3

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