Home 

RTC (Real-Time Clock) Programs for
Various IBM PC Family Expansion Cards




??? Unknown maker


Card ??????
RTC software IMPCLOCK.zip
"        "      Displays "CLOCK V2.1A IMPERIAL INT'L CO. NOV 1985"


Card ??????
RTC software RTC.EXE
"        "      Looking for _8167 class chip, 16 I/O ports, at base port of either 2C0 or 2A0 or 280     (source: Maelgrum at the VCF)


Card CSCA
Note There is a single program for the clock supplied with this card - RTC.EXE
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' 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 hardware A ???? chip that sits at the base I/O port of either 240 or 340     (source: user's manual)
RTC software User manual quotes RTC.EXE, but I do not have an RTC.EXE for the base I/O port of either 240 or 340.
Something else that is expected to work is TIMER.COM version 1.0, found below in the 'PC TIMER' section.
Manual User's Manual   (includes usage notes for a program named RTC.EXE)



AST

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)

Known Y2K issue

Technical info - I/O port usage of clock chips on AST cards



AT&T

The PC6300 computer is essentially a rebadged Olivetti M24. See entry for Olivetti M24.



Boca Research

Card BOCA I/O-XT
RTC software CLOCKBRI.ZIP
"        "      Known to work on the Boca Research card shown at here     (RTC chip is a RTC-58321)



Diamond Flower (DFI)


Card MBI-MIO
RTC software SETCLOCK.COM and GETCLOCK.COM
"        "      Looking for _8167 class chip, 32 I/O ports, at base port of either 2C0 or 340     (source: Maelgrum at the VCF)


Card DIO-200X
RTC hardware MM58167A chip, using I/O ports of range 2C0 - 2DF    (source: page 2-2 of user's manual)
RTC software SETCLOCK.COM and GETCLOCK.COM
"        "      Looking for _8167 class chip, 32 I/O ports, at base port of either 2C0 or 340     (source: Maelgrum at the VCF)
Manual User's Manual   (includes usage notes for SETCLOCK.COM and GETCLOCK.COM)


Card Unknown
RTC software HXPCLOCK.COM     (source: el_VR at the VCF)
"        "      Looking for _8167 class chip, 32 I/O ports, at base port of 2C0     (source: Maelgrum at the VCF)



DTK

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



Everex


Card EV-170
Note The EV-170A and EV-170B are not the same as the EV-170. They have no clock circuitry.
RTC software download
"        "      Looking for _8167 class chip, 32 I/O ports, at base port of 2C0     (source: Maelgrum at the VCF)



GENERIC: David_M's clock reader

Sourced from David_M at the VCF.
A replacement for many PC and XT clock programs.

CLOCK.zip



GENERIC: Strickland RTC Clock Programs

Sourced from the Simtel MS-DOS Collection.
A replacement for many PC and XT clock programs.

CLKPROGS.ZIP
Additional information about the software     (source: Maelgrum at the VCF)



Hypertec


Card Hyper-Port
Note 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 the date and time commands of DOS will automatically update the date/time on the Hyper-Port card.
RTC software CLOCK.SYS
"        "      Technical info - I/O port usage                (source: Maelgrum at the VCF)



Microforce


Card PLB85
RTC software Download



Olivetti


Computer M24
RTC software Download     (source: Simtel MS-DOS Collection)



Paradise Systems


Card 5-Pack (5PAK)
RTC software Download     (source: 6885P5H at the VCF)
Comment Type "CLSET HELP" for instructions on using CLSET.COM
Photo Photo



[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 1.3 works with a GW202 multifunction card.
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 /?

Additional information about the software     (source: Maelgrum at the VCF)



Peripherals Enterprise Company


Card GW202
RTC software Use TIMER.COM version 1.3, found above in the 'PC TIMER' section.
Manual User's Manual   (includes usage notes for TIMER.COM)



Persyst


Card Time Spectrum 384
Note Not the same as the 384L
RTC software CLOCK.COM for the 384 card
"        "      Technical info - I/O port usage                (source: Maelgrum at the VCF)


Card Time Spectrum 384L
Note Not the same as the 384
RTC software CLOCK.COM for the 384L card



Quadram

QuadMaster (1983) (usage notes included)  
QuadMaster II software (version 1.02, 1984)  (usage notes included)  
QuadMaster III software (version 2.01, 1985)  (usage notes included)  
QuadMaster III software (version 3.04, 1985)  (usage notes included)  (manual is here) (software source: Malc at the VCF)
QuadMaster III software (version 3.08, 1986)  (usage notes included)  (photo) (software source: Rolf at the VCF)



Samsung/Samtron


Computer Samtron 88S
Note The Samtron 88S is an XT clone that was made by Samsung.
An RTC is built into the motherboard.
RTC software TIMER.COM version 1.2, found above in the 'PC TIMER' section, is known to work.



Sigma Designs Inc.


Card Maximizer
RTC software STIME and XTIME programs                (usage described in the USAGE.TXT file within the ZIP file)



Tecmar


Card Tecmar Captain
RTC hardware A 58167 chip that sits at the base I/O port of either 37D or 27D     (source: user's manual)
RTC software TECMAR_CLOCK_UTILITIES.ZIP
"        "      Technical info - I/O port usage                (source: Maelgrum at the VCF)
Manual Documentation   (includes usage notes for RTC software)



VTech


Computer Laser XT
Note Laser XT/3 is not the same as Laser XT
RTC software SETCLOCK and GETCLOCK programs
"        "      Technical info - I/O port usage                (source: Maelgrum at the VCF)