Tool for Master System
| Version | Date | By | Download |
|---|---|---|---|
| 1.00 | 27 Mar 2024 | JoppyFurr | SN76489TestRom-SMS-1.00.zip (119KB) (includes source) |
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Discuss thisThere is a forum topic for SN76489 TestRom |
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Competition EntryThis was a competition entry in 2024 |
Seeing as my first entry is for testing a somewhat uncommon piece of hardware, I figured I'd make a second entry, for the SN76489/compatible sound chip available in all Master Systems.
This tool is intended to help testing real hardware against emulators to help spot differences in behaviour.
Seeing as the SN76489 doesn't have a key-on register, the volume of each channel is held at 15 (silent) until a button/key is pressed. The 'const' mode allows the volume to be passed to the chip without a key/button being pressed.
Both PAL and NTSC versions of the roms are generated, the only difference being the frequency values associated with the keyboard notes, as the clock frequency is slightly different.
See also SN76489TestRom-GG and SN76489TestRom-SG.