diff options
Diffstat (limited to 'listbas.rst')
| -rw-r--r-- | listbas.rst | 72 |
1 files changed, 58 insertions, 14 deletions
diff --git a/listbas.rst b/listbas.rst index a32f5c2..cb905c4 100644 --- a/listbas.rst +++ b/listbas.rst @@ -34,7 +34,7 @@ BASIC options ------------- **-b** - Set the BASIC dialect the program was written in. This disables + Set the BASIC dialect the program will be treated as. This disables autodetection. Supported dialects are: **-ba** @@ -52,10 +52,7 @@ BASIC options **-bxe** OSS BASIC XE. - If you see lots of "bad token XX" messages, or if the code just doesn't - make any sense, you're using the wrong BASIC option. **whichbas**\(1) - can usually detect the BASIC a program was written in, but if the - results are ambiguous, **listbas** will assume Turbo BASIC XL. + See **BASIC DIALECTS** below for details. **-i** Include the immediate mode command (line 32768) in the output. @@ -66,7 +63,8 @@ BASIC options **-t** Do not indent, if the program is Turbo BASIC, BASIC/A+, BASIC XL, or BASIC XE. - If you want to indent an Atari BASIC program, use **-bt** or **-bxl**. + By default, indentation is enabled for everything but Atari BASIC. + If you want to indent an Atari BASIC program, use **-bt** or **-bxe**. **-k** Do not print keywords in mixed case (e.g. **Print**, **Graphics**), @@ -132,6 +130,31 @@ Other display options .. include:: genopts.rst +BASIC DIALECTS +============== +Note that Turbo, BASIC XL, and BASIC XE are all proper supersets of +Atari BASIC, so you can view an Atari BASIC program with any of +**-bt**, **-bxl**, or **-bxe**. Also, BASIC XE is a superset of BASIC XL +(provided BASIC XL's disk-based toolkit extended commands are not used), +so you can usually use **-bxe** on a BASIC XL program. + +BASIC/A+ uses incompatible tokens, so its programs can't be viewed as +any of the others. Trying to do this results in a very funny-looking +listing, with commands like **POSITION** with no arguments (or with a +string argument, or **POSITION #6;"string"**; it so happens A+ uses the +same token number for **POSITION** that the other BASICs use for +**?**). The same thing would happen if you booted BASIC/A+ on an Atari +and tried to **LOAD** an Atari BASIC program. I can't help but think +this is a major reason BASIC/A+ didn't sell that well (fortunately, +OSS realized their mistake and fixed it in BASIC XL). + +If you see lots of "bad token XX" messages, or if the code +just doesn't make any sense, you're using the wrong BASIC +option. **whichbas**\(1) can usually detect the BASIC a program was +written in, but if the results are ambiguous, **listbas** will assume +Turbo BASIC XL. If this is wrong, use **-bxl** or **-bxe** to force +the issue. + COLORS ====== @@ -211,19 +234,35 @@ other is the background color of the terminal. NOTES ===== -So far, **listbas** doesn't support the indentation that BASIC A+/XL/XE -do by default. It acts like **SET 12,0** has been executed... though -BASIC A+ doesn't actually *have* this option, and the indentation can't -be turned off in A+ at all. --- +Indentation +----------- + +The indentation isn't all that well-tested yet, but so far it seems work +correctly. The **-t** option is the equivalent of **\*L\ -** for Turbo, +or **SET 12,0** for BXL/BXE. The different BASICs have different +indentation rules; try viewing the same Atari BASIC program with +**-bt**, **-bxl**, and **-bxe** to compare them. + +**listbas -t** is also (as far as I know) the only way to **LIST** +a BASIC/A+ program without indentation, since BASIC/A+ itself doesn't +have a way to disable it. + +Turbo BASIC, at least, will "max out" the indentation level at some +point. Once there are 60 or so levels of indent, it stops adding +more. **listbas** doesn't emulate this behaviour (shouldn't be a +problem, it's a pathological case). + +Protected Programs +------------------ **listbas** will refuse to operate on a LIST-protected program with scrambled variable names. For code-protected programs, it will stop at the line with the invalid offset. Use **unprotbas**\(1) to remove the protection. --- +Comparison to chkbas +-------------------- **listbas** is similar to Jindroush's **chkbas**\(1). The main differences are: @@ -234,6 +273,9 @@ protection. - **listbas** supports OSS BASIC/A+ in addition to Turbo and BXL/BXE. +- **listbas** indents BASIC/A+, Turbo, BXL, and BXE code, just like the + actual BASICs do. + - **listbas** doesn't show information about the variables. Use **vxrefbas**\(1) for that. @@ -251,7 +293,8 @@ protection. on variable-protected programs. For code-protected programs, it lists the program up to the "poisoned" line (normally the last line). --- +Terminal Support +---------------- The color and inverse/bold/underline support assumes your terminal supports ANSI/VT220 escape codes... but it does *not* use **curses**\(3X) or @@ -293,7 +336,8 @@ Also, **rxvt** and **aterm** don't support Unicode, but they will otherwise work (display color and inverse) with the **-m** or **-d** options to **listbas**. --- +HTML Output +----------- I thought about adding an HTML output option, but there's no need: if you want a colorful listing of an Atari BASIC program, install **aha**\(1) from |