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Description It is a project based on the SMBacker RTC but without Disk On Chip memory and a very low profile, which has the port mapped with these order options: 240h, 2A0h, 340h, 70h or other define…Read More…
It is a project based on the SMBacker RTC but without Disk On Chip memory and a very low profile, which has the port mapped with these order options:
240h, 2A0h, 340h, 70h or other defined by the buyer.
The visible part after being inserted in the ISA slot is little more than the size of a 3V CR2032 battery as can be seen in the last photograph.
All discrete logic with an SPLD ATF16V8B, including the configuration of the port, thanks to which it can be reconfigured because the SPLD IC is into socket.
ISA gold fingers for greater signal reliability and board durability.
Sergey's micro8088 project lacks RTC unlike the other xi8088 project also designed by him. For this reason I decided to redesign the existing SMBacker project, removing the part of Disk On Chip that I consider unnecessary, and reducing the size of the board as much as possible.
The small size is a differentiating element in this project, while maintaining the ease of welding in this second version when using throuth hole technology.
I have modified the micro8088 BIOS to make it compatible with it (version 0.9.7) on 70h port, and Sergey has optimized and improved the code. Until he decides to make it public in your GitHub repository, I leave it available in mine, as well as the instructions for its flashing:
If your PC BIOS does not have support for RTC, you must use its management software, there are already several solutions for this purpose. However, after several tries it has been observed that these do not work properly. I suggest the use of the this application programmed by Alejandro Valero that has shown adequate operation:
COMMANDS (Default port 2C0h)
SETRTC.EXE - Update RTC from system date/time
GETRTC.EXE - Update system date/time from RTC
BATRTC.EXE - Check RTC battery status
All the commands allow a parameter with the port number that we want to use in decimal. So, to use it on port 240h, you must indicate parameter 576…
The best thing is that once you have it configured, add "get_RTC" to the autoexec.bat.
If your equipment is not a Micro8088, a recommended I / O port is 240h because it seems to be the one with the least conflicts.
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|Shipping Rate||Tracked||Ships From||First Item||Additional Items|
Hans | March 13, 2022
Jason | Sept. 24, 2021
Bruno | Sept. 12, 2021
Terry | July 1, 2021
Nicolas | May 17, 2021
Alex | April 27, 2021
Darren | March 22, 2021
Nils | Nov. 19, 2020
Miodrag | Nov. 2, 2020
Jason | Aug. 25, 2020
Thorsten | July 31, 2020
Kheng Meng | April 26, 2020
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