BASIC System Statements and Functions - fvdhoef/aquarius-plus GitHub Wiki

DEF USR

Coming soon.

DEF USR

Coming soon.

GETSPEED

Coming soon.

IN

TYPE: USB BASIC system function

FORMAT: IN ( port )

Action: Reads a byte from the I/O port specified by port.

  • port is an expression that reduces to an integer value in the range 0 to 255.

Examples of IN:

PRINT IN(252)

Prints cassette port input status

S=IN(254)

Sets variable S to Printer Ready status

FORMAT: IN ( address )

Action: Reads a byte from the I/O port specified by the least significant byte of address.

  • address is an expression that reduces to an integer value in the range -32768 to 32767.
  • Advanced: During the read, address is put on the Z80 address bus.

plusBASIC enhancement

  • address can be an integer value in the range -65535 and 65535 ($0000 to $FFFF).

IN$

Coming soon.

OUT

TYPE: USB BASIC system statement

FORMAT: OUT port , byte

Action: Sends byte to the I/O port port.

  • port is an integer expression specifying the I/O port the byte is to be sent to.
    • If port is in the range 0 through 255, it directly corresponds to the I/O port number.
    • If port is in the ranges -32768 through -1 or 256 through 32767.
      • The the low byte specifies the I/O port to be written to.
      • The high byte is placed on lines 7 through 15 of the address bus.
  • byte is an integer between 0 and 255 specifying the value to be sent to the port.

Examples of OUT:

OUT 246, 12

Send a value of 12 to the SOUND chip

10 X=14:OUT 254, X

Send a value of 14 to the Cassette sound port

plusBASIC v0.22w enhancements

TYPE: plusBASIC system statement

FORMAT: OUT port , bytes { ; port , bytes ...}

Action: Sends one or more bytes to one or more Z80 I/O ports.

  • port is an integer in the range -65536 through 65535.
    • The low byte of port specifies the I/O port to be written to
    • The high byte of port is place on lines 7 through 15 of the address bus.
  • bytes is is a list of one or more byte values and/or strings, separated by commas.

Examples of OUT:

P$="ABCD":OUT 252,P$

Send bytes with values 64, 65, 66, and 67 to cassette port

10 OUT 254,0,$"010203",4

Sends bytes with values 0, 1, 2, 3, and 4, to the printer port.

OUT $EA,17;$EB,$"0468"

Sets the second color of palette 1 to RGB values 6, 4, and 8, respectively.

PAUSE

Coming soon.

SET FAST

TYPE: plusBASIC system statement

FORMAT: SET FAST ON

Action: Enables turbo mode (clock speed 7.16MHz)

FORMAT: SET FAST OFF

Action: Disables turbo mode.

SET SPEED

Coming soon.

SET USRINT

Coming soon.

VER

Coming soon.

VER$

Coming soon.

WAIT

Coming soon.