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Index

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H
	HSYNC
	huc.inc
	HuC6260-Video Color Encoder(VCE)
	HuC6270-Video Display Controller(VDC)
I
	I/O port bit mask
	incdw
	incw
	Index docs/vce.txt docs/vdc.txt
	INT_ALL
	INT_IRQ1
	INT_IRQ2
	INT_NMI
	INT_TIMER
	Interface
	Interrupts management
	IO_CD_MASK
	IO_COUNTRY_MASK
	IO_JOYPAD_DOWN
	IO_JOYPAD_I
	IO_JOYPAD_II
	IO_JOYPAD_III
	IO_JOYPAD_IV
	IO_JOYPAD_LEFT
	IO_JOYPAD_MASK
	IO_JOYPAD_RIGHT
	IO_JOYPAD_RUN
	IO_JOYPAD_SEL
	IO_JOYPAD_UP
	IO_JOYPAD_V
	IO_JOYPAD_VI
	IRQ indentifiers
	IRQ vectors
	irq_cnt
	irq_disable
	irq_disable_vec
	irq_enable_vec
	irq_m
	irq_off
	irq_on
	irq_set_vec
	irq_status
	IRQ1
	IRQ2
	irqport
J
	joyold
	joypad
	Joypad Functions
	Joypad port
	joypad_6
	joypad_6_read
	joypad_delay
	JOYPAD_DOWN
	JOYPAD_I
	JOYPAD_II
	JOYPAD_III
	JOYPAD_IV
	JOYPAD_LEFT
	joypad_poll
	joypad_read
	joypad_reset_multitap
	JOYPAD_RIGHT
	JOYPAD_RUN
	JOYPAD_SEL
	JOYPAD_UP
	JOYPAD_VI
	joyport
	joytrg
L
	lsrdw
	lsrw
M
	Macros include/clock.inc include/huc.inc include/map.s include/mpr.inc include/scroll.s include/vdc_sprite.s include/vgm.s
	map_copy
	map_copy_16
	map_data
	map_load
	map_load_16
	map_set
	map_set_bat_bounds
	Math routines
	memcpy_args
	memcpy_ex
	memcpy_init
	memcpy_mode
	Memory copy
	Memory copy helpers
	Memory mapping utility routines include/mpr.inc include/mpr.s
	mulu16
	mulu8
N
	neg include/byte.inc include/mpr.inc
	negdw
	negw
	NMI
P
	Pachinko controller
	phdw
	phw
	pldw
	plw
	Ports include/vce.inc include/vdc.inc
	Predefined colors
	print_bcd
	print_char
	print_dec_u16
	print_dec_u8
	print_digit
	print_fill
	print_hex
	print_hex_u16
	print_hex_u8
	print_string
	print_string_n
	print_string_raw
	PSG Functions
	PSG registers
	psg_ctrl
	PSG_CTRL_CHAN_ON
	PSG_CTRL_DDA_ON
	PSG_CTRL_FULL_VOLUME
	PSG_CTRL_VOL_MASK
	PSG_CTRL_WRITE_RESET
	psg_freq_hi
	psg_freq_lo
	psg_init
	psg_lfoctrl
	psg_lfofreq
	psg_mainvol
	psg_noise
	psg_pan
	psg_wavebuf
	psgport
R
	rand8
	rand8_seed
	Random number generators
	Registers include/psg.inc include/vdc.inc
	remap_data
	RGB
	roldw
	rolw
	rordw
	rorw

HSYNC = 5

Increment a 32 bits value at stated memory location.

Increment a word-sized value at stated memory location.

INT_ALL = INT_IRQ2 | INT_IRQ1 | INT_TIMER | INT_NMI

Bitfield grouping all interrupts.

IRQ1 is triggered by the VDC.

This interrupt is available on the HuCard and expension connectors.

The NMI interrupt does not seem to be used.

This TIMER interrupt is generated by the HuC6280’s internal timer.

Basically the controller acts as 2 joypads plugged on a 2 ports multitap.

IO_CD_MASK = %10000000

CD-ROM base unit sense bit.

IO_COUNTRY_MASK = %01000000

Country detection.

IO_JOYPAD_DOWN = %00000100

Bit in the joyport for the down direction on the D-PAD (SEL=1).

IO_JOYPAD_I = %00000001

Bit in the joyport for button I (SEL=0).

IO_JOYPAD_II = %00000010

Bit in the joyport for button II (SEL=0).

IO_JOYPAD_III = %00000001

Bit in the joyport for button III on a 6-button joypad.

IO_JOYPAD_IV = %00000010

Bit in the joyport for button IV on a 6-button joypad.

IO_JOYPAD_LEFT = %00001000

Bit in the joyport for the left direction on the D-PAD (SEL=1).

IO_JOYPAD_MASK = %00001111

Joypad port pin.

IO_JOYPAD_RIGHT = %00000010

Bit in the joyport for the right direction on the D-PAD (SEL=1).

IO_JOYPAD_RUN = %00001000

Bit in the joyport for the RUN button (SEL=0).

IO_JOYPAD_SEL = %00000100

Bit in the joyport for the Select button (SEL=0).

IO_JOYPAD_UP = %00000001

Bit in the joyport for the up direction on the D-PAD (SEL=1).

IO_JOYPAD_V = %00000100

Bit in the joyport for button V on a 6-button joypad.

IO_JOYPAD_VI = %00001000

Bit in the joyport for button VI on a 6-button joypad.

irq_cnt = $20f2

Interrupt counter.

irq_disable = irqport+2

Interrupts disable port.

Disable IRQ vector.

Enable IRQ vector.

irq_m = $20f5

Interrupt control mask.

Disable one or multiples IRQ interrupts.

Enable one or multiples IRQ interrupts.

Set user interrupt functions.

irq_status = irqport+3

Interrupts status.

IRQ1 = 1

IRQ2 = 0

Index of the user defined IRQ2 vector.

irqport = $1400

IRQ ports

joyold .ds 5

Previous 5 joypads values.

joypad .ds 5

This array holds the values for 5 2-buttons joypads.

joypad_6 .ds 5

This array contains the values for buttons III, IV, V and VI of 5 6-buttons joypads.

Poll 6-buttons joypads state.

9 cycles delay before reading data after SEL line update.

Bit in the joypad for the down direction..

JOYPAD_I = IO_JOYPAD_I

Bit in the joypad for button I.

JOYPAD_II = IO_JOYPAD_II

Bit in the joypad for button II.

JOYPAD_III = IO_JOYPAD_III

Bit in the joypad for button III.

JOYPAD_IV = IO_JOYPAD_IV

Bit in the joypad for button IV.

Bit in the joypad for the left direction.

Read joypad state.

Poll joypads state.

Reset multitap to the first joypad.

Bit in the joypad for the right direction.

JOYPAD_RUN = IO_JOYPAD_RUN

Bit in the joypad for the RUN button.

JOYPAD_SEL = IO_JOYPAD_SEL

Bit in the joypad for the Select button.

Bit in the joypad for the up direction.

Bit in the joypad for button VI.

joyport = $1000

I/O port.

joytrg .ds 5

Delta joypad values for 5 2-buttons joypads.

Right shift 32 bits value.

Right shift word-sized value.

Map copy helper macro.

16x16 tilemap copy helper macro.

Map data to mpr 3 and 4.

Load a portion of a 8x8 tilemap to VRAM.

Load a portion of a 16x16 tilemap to VRAM.

Set current map pointers and infos.

Defines the vertical bounds of the BAT map area.

Set memcpy arguments.

Copy len bytes from the src to dst.

Initialize memcpy routine.

Set memcpy mode (see Copy Modes).

As tia, tii, tin, etc...

Multiply 2 unsigned words.

Multiply 2 unsigned bytes.

Negate value.

Negate 32 bits value.

Negate word-sized value.

NMI = 3

Push 32 bits value onto the stack.

Push word-sized value onto the stack.

Pull 32 bits value from the stack.

Pull word-sized value from the stack.

Output a bcd number at the current BAT location.

Output an ASCII character at the current BAT location.

Output an unsigned decimal number at the current BAT location.

Output a decimal digit at the current BAT location.

Fill an area with a given character.

Output a hexadecimal digit at the current BAT location.

Output a hexadecimal number at the current BAT location.

Display a null (0) terminated string in a textarea.

Display the n first characters of a string.

Display a null (0) terminated string.

psg_ctrl = psgport+4

Control register.

PSG_CTRL_CHAN_ON = %10000000

PSG control register bit masks 1 - Channel on 0 - Channel off

PSG_CTRL_DDA_ON = %11000000

DDA output.

PSG_CTRL_FULL_VOLUME = %00111111

Channel maximum volume (bit 5 is unused)

PSG_CTRL_VOL_MASK = %00011111

Channel volume.

PSG_CTRL_WRITE_RESET = %01000000

Reset waveform write index to 0

psg_freq_hi = psgport+3

Rough frequency adjust.

psg_freq_lo = psgport+2

Fine frequency adjust.

Initialize PSG.

psg_lfoctrl = psgport+9

LFO trigger and control.

psg_lfofreq = psgport+8

LFO frequency.

psg_mainvol = psgport+1

Global sound volume.

psg_noise = psgport+7

Noise control.

psg_pan = psgport+5

Channel balance.

psg_wavebuf = psgport+6

Channel sound data.

psgport = $0800

PSG port.

Generates 8-bit pseudo-random number.

Set pseudo-random number seed.

http://codebase64.org/doku.php?id=base:small_fast_8-bit_prng

Update value of mpr 3 and 4 if needed.

Convert 3bit R, G, B to 9bit palette entry.

Left rotate 32 bits value.

Left rotate word-sized value.

Right rotate 32 bits value.

Right rotate word-sized value.