g451252772ea@deneb.ucdavis.edu (0040;0000003376;0;327;142;) (10/18/87)
What follows is a msg I copied some time back... it seems to be Pascal source to provide NTSC out. Of where, and how, is not obvious (but I haven't yet looked, either... not a real high priority just now). If you find out, I'd appreciate hearing the story. Hopefully helpfully, Ron Goldthwaite, UC Davis, Psychology & Animal Behavior Article 6307 of comp.sys.mac: Relay-Version: version B 2.10.2 9/18/84; site ucdavis.UUCP Path: ucdavis!ucbvax!decvax!decwrl!hplabs!hp-pcd!uoregon!omepd!intelisc!littlei!ogcvax!afoster From: afoster@ogcvax.UUCP (Allan Foster) Newsgroups: comp.sys.mac Subject: Mac II NTSC Video source code Message-ID: <1413@ogcvax.UUCP> Date: 10 Sep 87 20:00:20 GMT Date-Received: 12 Sep 87 01:28:34 GMT Reply-To: afoster@ogcvax.UUCP (Allan Foster) Organization: Oregon Graduate Center, Beaverton, OR Lines: 83 Ok Folks, Here is the source to change the MAC II into Ntsc video. The Slot must be between 9 and 14 inclusive. The procedures are written in Rascal from Reed College but the format is reliatively similar to Pascal. I am posting the news as I have received a lot of requests to do this. Procedure SetInterlace(Slot:Integer); (* Set to NTSC Video *) Var CardPtr : ^Longint[15]; (* Pointer to array of longints *) Dummy : Integer; Calc : Longint ; Begin (* CardPtr := $100000L*Slot +$80000L; card = $00100000*slot +$80000 *) CardPtr := Slot; CardPtr := (CardPtr << 20) +$80000L; (* << is the shift left OP *) CardPtr^[0] := $FF; CardPtr^[1] := $48; CardPtr^[2] := $ff; CardPtr^[3] := $f7; CardPtr^[4] := $9f; CardPtr^[5] := $1a; CardPtr^[6] := $c4; CardPtr^[7] := $e6; CardPtr^[8] := $fa; CardPtr^[9] := $f7; CardPtr^[10] := $e5; CardPtr^[11] := $F1; CardPtr^[12] := $7b; CardPtr^[13] := $f1; CardPtr^[14] := $d1; CardPtr^[15] := $06; CardPtr := Slot; CardPtr := (Cardptr <<20) +$C0000 ; Dummy := Cardptr^ ; (* Must be a Longint reference *) End; Procedure ClearInterlace(Slot:Integer); (* Set To Mac Normal video *) Var CardPtr : ^Longint[15]; Dummy : Integer; Begin CardPtr := Slot; CardPtr := (CardPtr <<20) +$80000L; (* card = $00100000*slot +$80000 *) CardPtr^[0] := $FF; CardPtr^[1] := $B8; CardPtr^[2] := $ff; CardPtr^[3] := $f7; CardPtr^[4] := $0f; CardPtr^[5] := $1a; CardPtr^[6] := $88; CardPtr^[7] := $b9; CardPtr^[8] := $fa; CardPtr^[9] := $e1; CardPtr^[10] := $e1; CardPtr^[11] := $e9; CardPtr^[12] := $79; CardPtr^[13] := $69; CardPtr^[14] := $d2; CardPtr^[15] := $02; CardPtr := Slot; CardPtr := (CardPtr <<20) +$B0000 ; Dummy := Cardptr^ ; End;