joystickandcursorkeys/basic64-js

Commodore 64 Basic Emulator

basic64-js's Issues

test - sprites in border

https://www.youtube.com/watch?v=-5ASyabVrxg

Normalize error messages

Start using this.Exception
to normalize basic errors, and detailed errors.

Multi color character mode

Errors when any parse error occurs

Issues with several for loops

FOR on 60, does not increase T

4 goto 60 basiccommands.js:61:17
5 print "�" basiccommands.js:61:17
6 for t=0to255:poke1024+t,t:next basiccommands.js:61:17
10 poke 53272,12 basiccommands.js:61:17
15 poke 1,0 basiccommands.js:61:17
20 for t=0 to 2047 basiccommands.js:61:17
30 poke 12288+t,peek(53248+t) basiccommands.js:61:17
40 next basiccommands.js:61:17
50 poke 1,255 basiccommands.js:61:17
60 for t=0to7: read a: poke 12288+t,a basiccommands.js:61:17
61 print t basiccommands.js:61:17
62 next basiccommands.js:61:17
100 data 170,85,170,85,170,85,170,85

The issue dissapears if line 60 is split up into the "for" part and the "after the for" part.
like
60 for t=0to7
61 read a: poke 12288+t,a
(and move 61 to 62 and 62 to 63)

chr$ / spc / missing string functions

Can't parse expression with "<" character in it

Example:
40 if t<1000 then goto 20

expected operator or 'eq/=', not comp < at line 40

Fix boolean operator NOT

Power menu

Import / Export
State save
Disk management (multiple virtual disks?)
Save screen shot
Make shareable link

Use defined characters

Implement negative numbers

keyboard help

Cycle per x commands, not per line

Fix boolean operators AND / OR

"Sprites" example program stopped moving sprites

input command

able to pause or break listing a long basic program, when it scrolls

Space mandatory between keywords (should not be)

?1 does not work, but ? 1 does work.
Space is mandatory.

PRINT1 works on C64, but not in basic64

Issue with print and no parameter

"print:print"
creates an exception.

while "print", works ok

Long Lines - for override mode

DEF FN function declaration

Export in clear text format

?1 does not work

PRINT1 does

import snapshot

Print should use 1 reserved character for -/+ sign.

Make hires example work

See example program on:
https://paulnotebook.net/2019/06/08/plotting-a-function-in-hi-res-graphics-mode-on-a-commodore-64/

Menu - Import bas program as upload

? does not work, instead of print

Syntax error
When used inside a program

Implement spc function as part of PRINT

SPC(n) is a parameter to PRINT (just like ";")

SPC usually does not work standalone in commodore basic.

Implement FOR loop

Edit - Import virtual disk

Make menu easier on mac

Add TAB = menu
Add 1-8 instead of F1-F8
Add CTRL-Backspace is runstop/restore

Math calculations use wrong priority order

Example

Menu - Import program through clipboard

"if 1<>2" does not work

Create multicolor sprites

Fix commodore keywords followed by next, without separator

In commodore basic.

reada and read a & printa and print a are equivalent commands.

a = undefined, when not defined, should be 0

print a, without defining a, returns "undefined"

Parameters should be passed with "Type" to functions and statements

Right now they are passed as below.

Array [ {…} ]
​
0: Object { type: "value", value: 1 }
​​
"type=value" is not enough.

Simple sound emulation

Multi color hires graphics mode

Copy paste functions for screen

FOR loop step 0

Complete list of keywords for tokenizer

Is needed for parsing commands like
poke1
printa
readb

-make commands class "queryable".
-only for statements, functions are simpler, they end with a "("

Delete from disk

Export disk

Better syntax checking on parameters

Syntax error should stop program

Should stop program but does not.

Implement LIST params

• list 10
  Only line 10

• list -100
  All lines up to 100 (inclusive)

• list 10-20
  All lines from 10 to 20 (inclusive)

• list 20-
  All lines from 20 and up (inclusive)

Create Hires graphics