post code master - the site for BIOS, POST & BEEP code information

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Microid Research Mr. Bios Beep Codes

  • Low High - Low Low Low ROM BIOS Checksum Test
  • Low High - High Low Low Page Register Test (Ports 81-8F)
  • Low High - Low High Low 8042 (Keyboard Controller) Selftest
  • Low High - High High Low Memory Refresh Circuit test
  • Low High - Low Low High Master (16 bit) DMA Controller Failure
  • Low High - High Low High Slave (8 bit) DMA Controller Failure
  • Low High - Low Low Low Low Memory Bank 0 Pattern Test Failure
  • Low High - High Low Low Low Memory Bank 0 Parity Circuitry Failure
  • Low High - Low High Low Low Memory Bank 0 Parity Error
  • Low High - High High Low Low Memory Bank 0 Data Bus Failure
  • Low High - Low Low High Low Memory Bank 0 Address Bus Failure
  • Low High - High Low High Low Memory Bank 0 Block Access Read Failure
  • Low High - Low High High Low Memory Bank 0 Block Access Read/Write Failure
  • Low High - High High High Low Master 8259 (Port 21) Failure
  • Low High - Low Low Low High Slave 8259 (Port A1) Failure
  • Low High - High Low Low High Master 8259 (Port 20) Interrupt Address Error
  • Low High - Low High Low High Slave 8259 (Port A0) Interrupt Address Error
  • Low High - High High Low Low 8259 (Port 20/A0) Interrupt Address Error
  • Low High - Low Low High High Master 8259 (Port 20) Stuck Interrupt Error
  • Low High - High Low High High Slave 8259 (Port A0) Stuck Interrupt Error
  • Low High - Low High High High System timer 8254 CH0/IRQ0 Interrupt Failure
  • Low High - High High High High 8254 Channel-0 Test and Initialization
  • Low High - Low Low Low Low High 8254 Channel-2 (Speaker) Failure
  • Low High - High Low Low Low High 8254 OUT2 (Speaker Detect) Failure
  • Low High - Low High Low Low High CMOS RAM Read/Write Test Failure
  • Low High - High High Low Low High RTC Periodic Interrupt / IRQ8 Failure
  • Low High - Low Low High Low High Video Initialization and (Cold-Boot) Signon Message
  • Low High - High Low High Low High Keyboard Controller Failure
  • Low High - Low Low Low High High A20 Test Failure Due to 8042 Timeout
  • Low High - High Low Low High High A20 Gate Stuck in Disabled State
  • Low High - Low High High Low High Memory Parity Error
  • Low High - High High High Low High IO Channel Error
  • Low High - Low High Low High High Real Time Clock (RTC) is Not Updating
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