def value_fre(ins):
""" FRE: get free memory and optionally collect garbage. """
val = parse_bracket(ins)
if val[0] == '$':
# grabge collection if a string-valued argument is specified.
var.collect_garbage()
return fp.pack(fp.Single.from_int(var.fre()))
def __init__(self, greet, load):
""" Initialise the interpreter session. """
# true if a prompt is needed on next cycle
self.prompt = True
# input mode is AUTO (used by AUTO)
state.basic_state.auto_mode = False
# interpreter is executing a command
state.basic_state.parse_mode = False
# interpreter is waiting for INPUT or LINE INPUT
state.basic_state.input_mode = False
# previous interpreter mode
self.last_mode = False, False
# syntax error prompt and EDIT
state.basic_state.edit_prompt = False
# initialise the display
display.init()
# initialise the console
console.init_mode()
# set up event handlers
state.basic_state.events = events.Events()
# load initial program
if load:
# on load, accept capitalised versions and default extension
with disk.open_native_or_dos_filename(load) as progfile:
program.load(progfile)
# set up interpreter and memory model state
reset.clear()
# greeting and keys
if greet:
console.clear()
console.write_line(greeting.format(version=plat.version, free=var.fre()))
console.show_keys(True)
def value_fre(ins):
""" FRE: get free memory and optionally collect garbage. """
val = parse_bracket(ins)
if val[0] == '$':
# grabge collection if a string-valued argument is specified.
var.collect_garbage()
return fp.pack(fp.Single.from_int(var.fre()))
def print_greeting(console):
""" Print the greeting and the KEY row if we're not running a program. """
import var
greeting = ('PC-BASIC {version} {note}\r'
'(C) Copyright 2013--2015 Rob Hagemans.\r'
'{free} Bytes free')
# following GW, don't write greeting for redirected input
# or command-line filter run
if (not config.get('run') and not config.get('exec')
and not config.get('input') and not config.get(0)
and not config.get('interface') == 'none'):
debugstr = ' [DEBUG mode]' if config.get('debug') else ''
params = {'version': plat.version, 'note': debugstr, 'free': var.fre()}
console.clear()
console.write_line(greeting.format(**params))
console.show_keys(True)
def print_greeting(console):
""" Print the greeting and the KEY row if we're not running a program. """
import var
greeting = (
'PC-BASIC {version} {note}\r'
'(C) Copyright 2013--2015 Rob Hagemans.\r'
'{free} Bytes free')
# following GW, don't write greeting for redirected input
# or command-line filter run
if (not config.get('run') and not config.get('exec') and
not config.get('input') and not config.get(0) and
not config.get('interface') == 'none'):
debugstr = ' [DEBUG mode]' if config.get('debug') else ''
params = { 'version': plat.version, 'note': debugstr, 'free': var.fre()}
console.clear()
console.write_line(greeting.format(**params))
console.show_keys(True)