[Coco] Re: CoCo related question? (Better edit for coco3.rom)

[Albert Stinger]

For EDITEX so far we have:

*
* To use the enhanced edit command enter EDITEX from the OK prompt in BASIC
* The checking for enhanced edit command This code will be patched
* into the memory starting at $A064 - $A071 which is 12 bytes.
*
CHKEDEX JSR LAF67  * CONVERT LINE NUMBER TO BINARY, RETURN VALUE IN BINVAL
 BCC CHKED  * IF NOT LINE NUMBER, BETTER BE ENHANCED EDIT
 JMP L89AE  * GO GET LINE NUMBER AND RETURN TO EDIT
CHKED LEAS $04,S  * PURGE RETURN ADDRESSES OFF OF THE STACK
 JMP EDITEX  * MUST BE ENHANCED EDIT JUMPING THERE
 RTS   * CLEANUP CODE

*
* EDIT - if you enter EDIT [LINE NUMBER] in the CONSOLE you come here.
*        We must patch the EDIT address ($8534) and ($8535) with $A089
*
EDIT JSR CHKEDEX  * GET LINE NUMBER FROM BASIC

*
* Since this is BASIC and this is a command we will need syntax checking,
* so the function EDITEX will start out like this:
*

00100         ORG     EDITEX
00110 START   ANDA    #$DF MAKE UPPER CASE
00120         CMPA    #'E SYNTAX CHECK
00130         BEQ     CHK2 OK
00140 CHK1    JMP     $B277 SYNTAX ERROR
00150 CHK2    JSR     $009F GET NEXT INPUT
00160         ANDA    #$DF MAKE UPPER CASE
00160         CMPA    #'X SYNTAX CHECK
00170         BNE     CHK1 SYNTAX ERROR EXIT WITH ERROR MESSAGE
00190         END  EDITEX continues...


Now it's like a real command with syntax checking.
Now to get into the EDITEX command you would have
to enter EDITEX from the console.

Albert Stinger

"Robert Emery" <theother_bob at yahoo.com> wrote 
in message news:20050323203801.83601.qmail at web81507.mail.yahoo.com...

>

> --- Albert Stinger 

> <albertstinger24 at canada.com> wrote:

>> More questions,

>> What would be the best way to interface to the edit command

>> so you could have full screen editing with the cursor keys?

>>

>

> I think you'd probably be better off replacing the entire

> edit routine than trying to convert it to a full screen editor.

> That's a pretty major change from the standard edit command,

> but I believe it has been done before and I would also

> like that functionality.

>

> Alan DeKok's Custom Color Basic has some very good enhancements

> to CoCo3 basic, especially if you have 512K. Contrary to popular

> belief, it's not that hard to use the extra RAM from basic.

>

> I'd like to see basic take advantage of extra memory and I'd

> LOVE to use my CoCo to read/write to PC formatted 720K floppies.

>

> Bob

>

>

>

>

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