DTA: DMA Channels
DMA Channels
0 = Refresh
1 = Open use for TBUs
2 = Disk Controller
3 = Open
Used by Application Used by BIOS
Port Programs Only
SmartVu mode control ports 490-493 090-093
SmartVu rightmost character 494 094
SmartVu right-center character 495 095
SmartVu left-center character 496 096
SmartVu leftmost character 497 097
SmartVu Display
Position 1 2 3 4
Address 497 496 495 494
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