Change / Get CPU mode. More...

Collaboration diagram for Z80 / R800 CPU mode:

Functions
void	msx_CHGCPU (const uint8_t mode)
	`MSXturboR` BIOS : CHGCPU (0180H/MAIN)

void	msx_set_cpu_mode (const uint8_t mode)
	`MSX` Change the CPU mode.

uint8_t	msx_GETCPU (void)
	`MSXturboR` BIOS : GETCPU (0183H/MAIN)

uint8_t	msx_get_cpu_mode (void)
	`MSX` Get the CPU mode.

Detailed Description

Change / Get CPU mode.

Function Documentation

◆ msx_CHGCPU()

void msx_CHGCPU ( const uint8_t mode )

MSXturboR BIOS : CHGCPU (0180H/MAIN)

Change the CPU mode.

Parameters

mode

cpu mode, that shall be the following bit pattern:

bit #7 : LED
- 0 : Do not change the LED status
- 1 : Turn the LED on and off according to the CPU
bit #6..#2 : (unused, shall be all 0)
bit #1..#0 : CPU
- 00 : Z80 mode
- 01 : R800 ROM mode
- 10 : R800 DRAM mode
- 11 : (reserved)

Note: This is a C language wrapper for the BIOS function CHGCPU (0180H/MAIN) for MSXturboR.

Attention: For MSX, MSX2, and MSX2+, the behavior is undefined.
Therefore, msx_set_cpu_mode() is recommended instead.

See also: msx_set_cpu_mode()

◆ msx_set_cpu_mode()

void msx_set_cpu_mode ( const uint8_t mode )

MSX Change the CPU mode.

Parameters

mode

cpu mode, that shall be the following bit pattern:

bit #7 : LED
- 0 : Do not change the LED status
- 1 : Turn the LED on and off according to the CPU
bit #6..#2 : (unused, shall be all 0)
bit #1..#0 : CPU
- 00 : Z80 mode
- 01 : R800 ROM mode
- 10 : R800 DRAM mode
- 11 : (reserved)

Note: This function is the C interface for the BIOS functionCHGCPU (0180H/MAIN) for MSXturboR.; For MSX, MSX2, and MSX2+, this function does nothing.
Therefore, unlike msx_CHGCPU(), this function can be used on any MSX platform.

See also: msx_CHGCPU()

◆ msx_GETCPU()

uint8_t msx_GETCPU ( void )

MSXturboR BIOS : GETCPU (0183H/MAIN)

Get the CPU mode.

Returns

cpu mode:

0 : Z80 mode
1 : R800 ROM mode
2 : R800 DRAM mode

Note: This is a C language wrapper for the BIOS function GETCPU (0183H/MAIN) for MSXturboR.

Attention: For MSX, MSX2, and MSX2+, the behavior is undefined.
Therefore, msx_get_cpu_mode() is recommended instead.

See also: msx_get_cpu_mode()

◆ msx_get_cpu_mode()

uint8_t msx_get_cpu_mode ( void )

MSX Get the CPU mode.