dvmaesc1
#define DMA_HASCOUNT(rev) ((rev)==dvmaesc1)
#define DMA_ISESC1(dma) ((dma)->revision == dvmaesc1)
case dvmaesc1:
if (esp->dmarev != dvmarev3 && esp->dmarev != dvmaesc1)
if (esp->dmarev == dvmaesc1) {
if (esp->dmarev == dvmaesc1) {
esp->dmarev = dvmaesc1;