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



A related diagram is at here.



??? Unknown maker


Card TK-200
RTC software TEKCLOCK.ZIP     (source: Chuck(G) at the VCF)
"        "      • "TK-200" appears in TKFLOPPY.BAT
• TEKCLOCK.BAT is used to set DOS' date/time into the card.
• Found on a 180K floppy, suggesting that the TK-200 card is early PC.


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     (info source: Maelgrum at the VCF)



AST

For AST cards.

ASTCLOCK.COM and SETCLOCK.COM    (1982)  (no version found - possibly version 1.00)
ASTCLOCK.COM    (version 1.10, 1984)  (from SuperPak version 4.2)
ASTCLOCK.COM    (version 1.20, 1985)  (from SuperPak version 5.02)
ASTCLOCK.COM    (version 1.21, 1985)  (includes usage information)  (from SuperPak version 6.11, dated 1988)

AST SixPakPlus - Move to new type of clock chip       (requires ASTCLOCK.COM from SuperPak version 4.3, or later)

Y2K issue - Summary
Y2K issue - Fix by patching ASTCLOCK.COM

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.



A.T.D. Inc.

Card T512CLK-A1
Photo Photo
RTC hardware ATD-20 clock module
RTC software Download     (source: natevw at the VCF)
Comment A.T.D. INC Sunnyvale, CA



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)



CC&C   (California Computer and Component, Inc.)


Card MFC-384i 8 PLUS
RTC software MFC-384i 8 PLUS - Support software.zip     (source: chris_nh at the VCF)
Note ADJCLK.COM - Use to set the clock on both card (RTC) and DOS.
DSPCLK.COM - Show the card's clock (RTC).
SYSCLK.COM - Set DOS' clock from the card's clock (RTC).  Normally executed via AUTOEXEC.BAT
HLPCLK.COM - Shows date and time format info.



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     (info 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     (info source: Maelgrum at the VCF)
Manual User's Manual   (includes usage information 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     (info source: Maelgrum at the VCF)



DTK


Card HEXA I/O PLUS
RTC hardware UM82C8167 chip
Comment Post #7 at here indicates that DFI's SETCLOCK.COM and GETCLOCK.COM (see above) will work.
Comment One of the versions of TIMER.COM below, in the PC TIMER section, is expected to work.


Card PII-125
RTC hardware OKI M5832 chip
RTC software DTKCLK11.ZIP
Comments DTKCLK11.ZIP software sourced from the Simtel MS-DOS Collection.  No particular DTK card specified, however, the software was found to work for DTK's PII-125 card.  Software may also suit certain other DTK cards.



Everex


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

Note:  If you have Sergey's XT-CF-Lite board, and it is configured for I/O port 300h (the default), see post #15 at here.



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     (info 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                (info source: Maelgrum at the VCF)



Microforce


Card PLB85
RTC software Download



Microlog


Card Baby Blue II
RTC software Download         (pointer to www.diskman.com)
Comments 1. Baby Blue II is a later version of Baby Blue.
2. Usage information for CLOCK.EXE is in section 3.1 of the user's manual.



Microsync


Device dClock
Photo Photo
RTC software Download     (source: archeocomp at the VCF)
Manual User's Manual   (includes usage information for SETDCLK.COM and READDCLK.COM)



Olivetti


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



Paradise Systems


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



[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     (info 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 information 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                (info 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 information included)  
QuadMaster II software (version 1.02, 1984)  (usage information included)  
QuadMaster III software (version 2.01, 1985)  (usage information included)  
QuadMaster III software (version 3.04, 1985)  (usage information included)  (manual is here) (software source: Malc at the VCF)
QuadMaster III software (version 3.08, 1986)  (usage information 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 chip 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                (info source: Maelgrum at the VCF)
Manual Documentation   (includes usage information for RTC software)




Turner Hall Publishing


Card "The Turner Hall Card"
Photo https://github.com/erikp9000/necclock
RTC chip NEC uPD1990AC
RTC software https://github.com/erikp9000/necclock     (software authored by ebp at the VCF)
Photo https://github.com/erikp9000/necclock



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                (info source: Maelgrum at the VCF)



Yangtech Electric Co. Ltd.


Card CSCA  I8310
Photo Photo
FCC ID FHQ484AC-X1031     (FHQ = Yangtech Electric Co. Ltd.)
Manual User's Manual
Note According to the user's manual, 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 UM82C8167 chip     (source: what is soldered to the card)
- Chip sits at the base I/O port of either 240 hex or 340 hex as configured by the card's switches 1 and 2     (source: user's manual)
RTC software The user's manual quotes RTC.EXE, but I do not have an RTC.EXE for the base I/O port of either 240 hex or 340 hex.
Something else that is expected to work is TIMER.COM version 1.0, found above in the 'PC TIMER' section.