f18a.h File Reference

contains the basic definitions for controlling the f18a video device. More...

#include <coleco/coltypes.h>

Go to the source code of this file.

Functions
void	vdp_f18ainit (void)
	Activate f18a device Activate f18a and init vdp_f18aok variable with 1 if it is ok
void	vdp_f18asetmode1 (u8 flags)
	Activate mode 1 in bitmap mode for f18a ONLY More...
void	vdp_f18asetpalette (void *data, unsigned char count)
	Send a palette RGB 12bits color entries to f18a device More...
void	vdp_f18asetscrollx (u8 bgnum, u8 x)
	Sets the horizontal scroll offset to the specified location. More...
void	vdp_f18asetscrolly (u8 bgnum, u8 y)
	Sets the vertical scroll offset to the specified location. More...

Variables
volatile u8	vdp_f18aok
	vdp_f18aok is set if f18a module is present when calling vdp_f18ainit function

Detailed Description

contains the basic definitions for controlling the f18a video device.

This unit provides generic features related to f18a device.

Here is the list of features:

• enable and disable f18a
  
• update palette
  

Function Documentation

vdp_f18asetmode1()

vdp_f18asetmode1

(

u8

flags

)

Activate mode 1 in bitmap mode for f18a ONLY

Parameters

flags

ecm mode definition F18A_ECMS_0P or F18A_ECMS_1..3B for sprite color mode F18A_ECMT_0P or F18A_ECMT_1..3B for tile color mode F18A_ECM_R30 for 30 lines mode F18A_ECM_TM2 to activate tile map 2 F18A_ECM_YRE to activate Y real coordinates

Examples:

graphics/f18a/f18abitmap1/f18abitmap1.c, graphics/f18a/f18aecm3/f18aecm3.c, and graphics/f18a/f18atest/f18atest.c.

vdp_f18asetpalette()

void vdp_f18asetpalette	(	void *	data,
		unsigned char	count
	)

Send a palette RGB 12bits color entries to f18a device

Parameters

data	address of data to use
count	number of data in words (each entry is two bytes)

Examples:

graphics/f18a/f18abitmap1/f18abitmap1.c, and graphics/f18a/f18aecm3/f18aecm3.c.

vdp_f18asetscrollx()

vdp_f18asetscrollx	(	u8	bgnum,
		u8	x
	)

Sets the horizontal scroll offset to the specified location.

Parameters

bgnum	background number (1 or 2 for TL1 and TL2)
x	the horizontal scroll offset (5 bits of scroll | 3 bits for planes : HTO0 HTO1 HTO2 HTO3 HTO4 HPO0 HPO1 HPO2)

vdp_f18asetscrolly()

vdp_f18asetscrolly	(	u8	bgnum,
		u8	y
	)

Sets the vertical scroll offset to the specified location.

Parameters

bgnum	background number (1 or 2 for TL1 and TL2)
y	the vertical scroll offset (5 bits of scroll | 3 bits for planes : VTO0 VTO1 VTO2 VTO3 VTO4 VPO0 VPO1 VPO2)