Classic computing fanatics Sergey Kiselev and Aitor Gómez García have developed a real-time clock add-in board for these with an IBM PC/XT or appropriate — providing an especially low profile, appropriate for even essentially the most cramped of instances.
“[The] RTC8088 controller card is an open supply actual time clock (RTC) card for IBM PC/XT appropriate computer systems, that sometimes lack a built-in actual time clock,” Kiselev writes of the system. “[The] RTC8088 challenge was initially designed by Aitor Gómez García to be used in Micro 8088 programs based mostly on the earlier work by Scott Baker, which in its flip partially based mostly on my Xi 8088 challenge. I up to date the RTC8088 V2 challenge, and added I/O [Input/Output] port configuration switches and DOS system driver.”
This compact card can add a battery-backed real-time clock to any IBM PC/XT or appropriate — and it is open {hardware}. (📷: Sergey Kiselev)
The three way partnership takes the type of a compact Trade Commonplace Structure (ISA) add-in board, slotting instantly into the motherboard of any IBM PC/XT or appropriate private pc — a household IBM launched in 1983 because the follow-up to its authentic IBM Private Pc.
The board options an authentic Dallas DS12885 real-time clock module, together with a button cell battery holder to maintain it ticking over whereas the PC is switched off. A DIP swap to the upper-left supplies the power to pick out an I/O handle — making it appropriate to be used with each authentic IBM PC/XTs and compatibles and with trendy Intel 8088-based units just like the Kiselev’s personal Micro 8088 processor board.
The cardboard drops into the motherboard’s ISA slot, providing an especially low profile. (📷: Aitor Gómez García)
PCBs, together with a pre-programmed glue-logic chip, may be bought from Kiselev’s Tindie retailer for $12, rising to $30 for a full package of components bar the CR2032 battery or $35 fully-assembled and examined. Patrons exterior North America should purchase the identical factor from García’s Tindie retailer.
Design recordsdata and supply code for the challenge can be found on García’s GitHub repository, underneath the strongly reciprocal CERN Open {Hardware} License 2 and GNU Common Public License 3 respectively.