PLOUFF%MX.LCS.MIT.EDU@MIT-MC.ARPA (Robert L. Plouffe) (07/06/86)
The file EDGCLK.ARC has been uploaded to SIMTEL20 and located in PD:<MSDOS.COMPATIBLES>EDGCLK.ARC. This ARC file contains the source and executable files for two utilities that will be useful to owners of Leading Edge, Model M and Sperry PC personal computers. (Maybe Model D also. See below.) They are: LE_MCLK Reads the on-board battery backed-up clock and sets the current clock to its values. This code is intended to be executed in your AUTOEXEC.BAT file. The .COM file is only 28 bytes. SETCLK Sets the date and time of the battery backed-up clock and simultaneously updates the current clock. The function of LE_MCLK is built into DOS 2.11 as supplied with the machine, and the v2.11 COMMAND.COM will update the battery clock with the internal DATE and TIME commands. So, if you stick with DOS 2.11 you don't need these utilities. However if you upgrade your DOS to 3.xx, you will find that it has no knowledge of the on-board battery backed-up clock. These utilities will then do the job and restore full function to the use of the battery clock. The programs use an undocumented feature of the on-board ROM BIOS. The Time-of Day interrupt (INT 1AH) has four additional functions beyond that of the IBMPC ROM BIOS. This is fully explained in the documentation. I suspect that the DOS 2.11 supplied with the Leading Edge, Model D is identical to the one supplied with the Model M. If so, then the ROM BIOS must also provide the same functionality for the additional INT 1AH functions - so this code will probably work with a model D also. Someone who has a Model D please let me know. Reply to PLOUFF at MIT-MX since I am not on all of the mailing lists to which this is directed.
PLOUFF%MX.LCS.MIT.EDU@mit-mc.ARPA (Robert L. Plouffe) (07/11/86)
Date: Sun, 6 Jul 86 12:05:14 EDT From: Robert L. Plouffe <PLOUFF%MX.LCS.MIT.EDU at MIT-MC.ARPA> To: INFO-MICRO%MX.LCS.MIT.EDU at MIT-MC.ARPA, INFO-CPM%MX.LCS.MIT.EDU at MIT-MC.ARPA, info-ibmpc at USC-ISIB.ARPA cc: PLOUFF%MX.LCS.MIT.EDU at MIT-MC.ARPA Re: LE, SPERRY, CLK UTLS The file EDGCLK.ARC has been uploaded to SIMTEL20 and located in PD:<MSDOS.COMPATIBLES>EDGCLK.ARC. This ARC file contains the source and executable files for two utilities that will be useful to owners of Leading Edge, Model M and Sperry PC personal computers. (Maybe Model D also. See below.) They are: LE_MCLK Reads the on-board battery backed-up clock and sets the current clock to its values. This code is intended to be executed in your AUTOEXEC.BAT file. The .COM file is only 28 bytes. SETCLK Sets the date and time of the battery backed-up clock and simultaneously updates the current clock. The function of LE_MCLK is built into DOS 2.11 as supplied with the machine, and the v2.11 COMMAND.COM will update the battery clock with the internal DATE and TIME commands. So, if you stick with DOS 2.11 you don't need these utilities. However if you upgrade your DOS to 3.xx, you will find that it has no knowledge of the on-board battery backed-up clock. These utilities will then do the job and restore full function to the use of the battery clock. The programs use an undocumented feature of the on-board ROM BIOS. The Time-of Day interrupt (INT 1AH) has four additional functions beyond that of the IBMPC ROM BIOS. This is fully explained in the documentation. I suspect that the DOS 2.11 supplied with the Leading Edge, Model D is identical to the one supplied with the Model M. If so, then the ROM BIOS must also provide the same functionality for the additional INT 1AH functions - so this code will probably work with a model D also. Someone who has a Model D please let me know. Reply to PLOUFF at MIT-MX since I am not on all of the mailing lists to which this is directed.