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A real time clock PC BIOSCompanion ROM for XT machines supporting many popular RTCs and ISA I/O adapters.

GLaTICK eliminates the need for DOS-based RTC clock drivers/programs letting your supported RTC "just work" like later PCs.

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Source Code

• ImplementsINT 1Ah RTC functionality for seamless clock support. Real time clock is set and read by DOS - no software needed!
• Support for many popular ICs including:
  • DS12x85/MC146818 used byRTC ISA 8 bits,NuXT,AT/CMOS (Ports70h,240h,2C0h)
  • MM58167/UM82C8167 used by SixPakPlus V1, Turbo 33-XT, Many clone I/O boards (Ports2C0h,240h,340h)
  • RP5C15 used by SixPakPlus V2
  • MSM5832 used by Quadram, DTK PII-125
  • MSM6242used by Intel Above Board and other MSM-6242 boards
  • DS1216x/DS1315SmartWatch "No-Slot" ROM socket clocks

• Any BIOS that supportsOption ROMs
• Asupported RTC card (of course)
• DOS 3.3 or later**
• GLaTICK ROM image within the valid Option ROM address space.More info here.

Using MASM 5:MAKE GLATICK.MAK.

Using MASM 6:NMAKE GLATICK.NMK.

The includedOPT2ROM.COM will convert the produced EXE file to a 2 KiB ROM file.

• Support for additional RTCs including:
  • MSM-58321
  • Dallas DS1644 Timekeeper

• @PickledDog, for the name

Copyright © 2023-24,640KB and contributors.