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VDP1 User's Manual / Chapter 2 Address Map

● System register

Table 2.1 System registers
 address
 name
 Contents
 access
 100000H
 TVHR
 TV mode selection
 Write-only (word)
 100002H
 FBCR
 Frame buffer switching mode
 Write-only (word)
 100004H
 PTMR
 Plot trigger
 Write-only (word)
 100006H
 EWDR
 Erase light data
 Write-only (word)
 100008H
 EWLR
 Erase light upper left coordinates
 Write-only (word)
 10000AH
 EWRR
 Erase light lower right coordinates
 Write-only (word)
 10000CH
 ENDR
 Forced drawing termination
 Write-only (word)
 100010H
 EDSR
 Transfer end status
 Read-only (word)
 100012H
 LOPR
 Processing interruption table address
 Read-only (word)
 100014H
 COPR
 Current processing table address
 Read-only (word)
 100016H
 MODR
 Mode state
 Read-only (word)


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HARDWARE ManualVDP1 User's Manual
Copyright SEGA ENTERPRISES, LTD., 1997