Sharp MZ-700 manual RDN Colr Ntsc, LPH1 PAL, Ntpl Gate VCC GND, ATB ATB Cgrom, Front, Back

Memory Management (2)

PH111

CAS circuit

WRN

MRQN

~------------------------------<1SEL

RDN

		COLR
			NTSC	~-------------In PH 10
LPH1	1/4		PAL
			select

NTPL

CL 0

GATE 0

VCC 0

GND 0

Colour VRAM (VRAM-2)				4-3. Memory mapped I/O ($EOOO - $EOO8)
• MZ-700 colour infonnation is managed character by
character. One byte of colour infonnation table is assign-
				CPU			Function
ed to each characters displayed on the TV screen.				memory	Controller
				address
				$EOOO		PA	: Output
D7	ATB		ATB: CGROM	$EOOl		Pe	: Input
				$E002	8255	Pc	: Input/output mode controller
D6	FRONT	G
			address switch-				by bit cell
D5	FRONT	R	ingbit	$E003		Mode controller
D4	FRONT	B		$E004		Co	: Mode 3
							(square wave rate ge»erator)
D3	Not used		....+-_FRONT	$E005		C,	: Mode 2
					8253		(rate generator)
D2	BACK	G
				$E006		C2	: Mode 0
D1	BACK	R					(terminal counter)
				$E007		Mode controller
DO	BACK	B
			BACK
				$E008	LS367 and	Tempo,joystick, HBLNK input
					others

Character iqfonnation is stored in address $DOOQ. $D7FF and colour infonnation in $D80Q.$DFFF of the

VRAM.

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