RTC (Real Time Clock) Programs for
Various IBM PC Family Expansion Cards
AST Cards (1982-1985)
For AST cards.
ASTCLOCK.COM and SETCLOCK.COM (1982) (no version found - possibly version 1.00)
ASTCLOCK.COM (version 1.10, 1984)
ASTCLOCK.COM (version 1.21, 1985)(includes usage notes)
Technical info - I/O port usage of clock chips on AST cards
AT&T PC 6300 (a computer, not a card)
Essentially a rebadged Olivetti M24. See entry for Olivetti M24.
CSCA Card (circa 1988)
There is a single program for the clock supplied with this card - RTC.COM
The command RTC /1 is put into the AUTOEXEC.BAT file. The /1 will cause the RTC program to read the date/time from the RTC card and set it into DOS's date/time.
Should the RTC's date/time become incorrect, the command RTC /2 is entered at the DOS prompt. The RTC program will then ask the user to input the current date/time then it will update the date/time on the RTC card.
RTC.EXE
Link to CSCA User's Manual (includes usage notes for RTC.EXE)
Diamond Flower's MBI-MIO Card (1987) and DIO-200X Card
With these cards, Diamond Flower supply 2 programs, GETCLOCK.COM and SETCLOCK.COM.
GETCLOCK fetches the date/time from the card and uses it to update DOS's system clock. A reference to GETCLOCK is placed in the AUTOEXEC.BAT file so that GETCLOCK is run each time the computer is turned on.
SETCLOCK is only used when the card's date/time becomes incorrect. To correct it, DOS's date and time commands are used after SETCLOCK is run, ie.
C:\>setclock
C:\>date
C:\>time
GETCLOCK.COM
SETCLOCK.COM
Link to DIO-200X User's Manual (includes usage notes for GETCLOCK and SETCLOCK)
DTK Clock/Calendar Card
Sourced from the Simtel MS-DOS Collection.
It is unknown exactly which DTK card these programs are for.
Usage included in the DTKCLOCK.DOC file.
DTKCLK11.ZIP
Hypertec's Hyper-Port Card (1986)
With this card, Hypertec supply a device driver named CLOCK.SYS
This is loaded onto the hard drive and a reference is made to it in CONFIG.SYS so that it is loaded in memory each time the computer is powered on.
With this method, everything is automatic - using DOS's date and time commands will automatically update the date/time on the Hyper-Port card.
CLOCK.SYS
Microforce PLB-85 Card (1985)
PLB85.ZIP (source: ???? at the VCF)
Olivetti M24 (a computer, not a card)
Sourced from the Simtel MS-DOS Collection.
Usage included in the READ.ME file.
M24CLK11.ZIP
PERSYST's Time Spectrum 384/384L (1984/85)
There is a single program for the clock supplied with these cards - CLOCK.COM
The command CLOCK /S is put into the AUTOEXEC.BAT file. The /S will cause the CLOCK program to read the date/time from the RTC card and set it into DOS's date/time.
Should the RTC's date/time become incorrect, the command CLOCK /I is entered at the DOS prompt. The CLOCK program will then ask the user to input the current date/time then it will update the date/time on the RTC card.
CLOCK.COM for the 384 card
CLOCK.COM for the 384L card
Quadram Cards (1983-1985)
QuadMaster (1983)(usage notes included)
QuadMaster II for Quadcards (version 1.02, 1984)(usage notes included)
QuadMaster III for Quadcards (version 2.01, 1985)(usage notes included)
Samsung's Samtron 88S (a computer, not a card)
The Samtron 88S is an XT clone made by Samsung.
An RTC is built into the motherboard.
Use TIMER.COM version 1.2, found below in the 'PC TIMER' section.
Strickland RTC Clock Programs
Sourced from the Simtel MS-DOS Collection.
Touted as a replacement for many PC and XT clock programs.
CLKPROGS.ZIP
Tecmar Cards
Usage described in the CLOCK.DOC file within the ZIP file.
TECMAR_CLOCK_UTILITIES.ZIP (source: juicylemon at the VCF)
PC TIMER
When run, these all display ** PC TIMER ** along with the version number.
Appear to be somewhat generic.
For example, version 1.2 works on the Samtron 88S computer.
For example, version 2.x works with an AST SixPakPlus card.
Perhaps these were supplied to card makers by a particular RTC chip maker.
TIMER.COM version 1.0
TIMER.COM version 1.2
TIMER.COM version 1.3
TIMER.COM version 2.x
Version 2.x Usage (earlier versions may be the same):
The command TIMER /S is put into the AUTOEXEC.BAT file. The /S will cause the TIMER program to read the date/time from the RTC card and set it into DOS's date/time.
Should the RTC's date/time become incorrect, the command TIMER /I is entered at the DOS prompt. The TIMER program will then ask the user to input the current date/time then it will update the date/time on the RTC card.
This information can be obtained by entering TIMER /?
VTech Laser XT (a computer, not a card)
laser_xt_utilities.zip (source: http://www.welook4things.com/sub_laser_xt_docs.html)