Ian's Blog - Electronics-Motorola-HC11Oh god... how did this get here? I am not good with computer.tag:joshianlindsay.com,2005:63187d1266ad21283196e7e2f3ed692f/Electronics-Motorola-HC11Textpattern2023-12-09T10:30:40ZIanhttp://joshianlindsay.com/Ian2009-06-15T09:36:28Z2018-11-28T03:04:50ZAT Keyboard Interfacetag:joshianlindsay.com,2009-06-15:63187d1266ad21283196e7e2f3ed692f/5fd433f10a6f236101da7b85e8804660
My first HC11 project when I was 16. This device plugs into an AT keyboard and converts the scancodes to ASCII, sending them over an RS-232 port at 9600bps.]]>
Ian2009-05-16T07:43:40Z2018-11-28T03:02:18ZHC11 32-bit by 32-bit multiplication routine [1]tag:joshianlindsay.com,2009-05-16:63187d1266ad21283196e7e2f3ed692f/d836957f3c7734ce56c471326c73f7d3
A couple quick subroutines that give an HC11 the means to get a 64-bit product from two 32-bit factors. I wrote it down on paper while I was sitting in my calculus class and copied it into my assembler verbatim when I got home.]]>
Ian2009-05-16T07:35:47Z2018-11-28T03:02:00ZDTMF Logger [2]tag:joshianlindsay.com,2009-05-16:63187d1266ad21283196e7e2f3ed692f/ed030db5125bd0bbd22cd4f3f4aa15e4
The DTMF logger uses an MT8870 DTMF decoder chip to listen to a POTS line and store any digits it hears in a 24C256 I2C EEPROM.]]>