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DMA and HDMA testsDMA and HDMA tests
Tests of DMA and HDMA, written by byuu.
By:
Evan G
Last updated: June 24, 2017
Tests of the DMA and HDMA. DMA stands for "Direct Memory Access", which allows the SNES hardware to copy to and from memory without using the CPU. HDMA is similar, but it does a transfer every horizonal blanking period.
In this package, there are two versions of the test_hdmatiming.smc program, version 2 (below) is the later version. The tests only show a blue screen (as far as I can tell), so there is not really a visual confirmation of the tests. The packages include source code.
Another separate package tests HDMA disable.
There is another version of HDMA Sync, but the source code appears to be identical to the version above, save one comment line. I'm putting it here for preservation sake.
This package contains several files. test_hdmasync.smc is the same as as the two other packages above. hdmatiming.smc is the same as in version 2 above. This contains additional tests. Version 2 contains a different version of test_mdrhdma.smc. If the date stamps are accurate, the second version is four days newer than version 1.