DIV Test

NOTE: This test is still WIP and may not always provide accurate results.

Metadata

Source File: /src/tests/divtest.asm
Compatible with: All Models

Description

This test verifies the initial value of the DIV register (after a certain period of time it takes the testing framework to boot). The instruction at the TestDIV label loads the current DIV status into a register to compare it against the expected value, which is as follows:

• DMG/MGB: $AD (Except DMG-0 bootrom)
• CGB/AGS/AGB: $1F (Except CGB-0 bootrom)
• SGB/SGB2: $D9

Error Messages

• Invalid initial DIV - The read DIV value does not match up with the expected value (as shown in the list above)