VSS

The four VSS pins in regions D3 and D4 of the jwdonal schematic

VSS is the name of multiple ground pins, as described on the jwdonal schematic. They are:

• pins 26 and 58 of the S-SMP
• pins 12 and 52 of the S-DSP

VSS appears in the 65c816 datasheet in Table 2-2, where it means "Internal Logic Ground." ^[1] On page 15, it means "system logic ground."

See Also

• VCC
• VS

References

1. page 12: https://www.westerndesigncenter.com/wdc/documentation/w65c816s.pdf