[Coco] Help with BASIC

[Brett Gordon]

An extremely scary hack of Darren's routines above.  Warning: no
checking of anything is done... don't overwrite your current selected
ROM.  bad things will happen.  This will flash a straight, flat, ROM
file from a disk to your SDC.

http://sites.google.com/site/cocoboot2/down

download the file sdkutils.dsk.



On Thu, Nov 20, 2014 at 12:23 PM, Brett Gordon <beretta42 at gmail.com> wrote:
> Cool.  Then just follow it up with a "write mem,yadayadayada"
> statement to the SDC!  awesome dude. Thanks!  I didn't know the asm
> would be that easy to manipulate (or at least read ) basic files..
>
>
>
> On Thu, Nov 20, 2014 at 11:12 AM, Darren A <mechacoco at gmail.com> wrote:
>> On Thu, Nov 20, 2014 at 5:40 AM, Brett Gordon wrote:
>>
>>> Has anybody created a utility to flash their SDC ROM banks from a
>>> BASIC disk file yet?  -or-  How would one accomplish loading a flat
>>> file into memory from BASIC?
>>>
>>> 1. Change the flat ROM into a BIN, and use CLOAD
>>>       a. is it possible to squeeze 16k of binary data into a BASIC
>>> enviroment?
>>>       b. yuck - this would require people to change their ROM's to BIN's
>>> 2. I didn't see any BASIC statements designed to load binary data - is
>>> there one?
>>> 3. Rip data from the the lowlevel disk buffers (unlawfully touching BASIC )
>>>
>>
>>
>> If you want to load a raw file (no preamble) into memory you can OPEN it as
>> a data file and use a small ML routine to read the bytes:
>>
>> 10 CLEAR 100,&H3FFF
>> 20 OPEN "I",#1,"FILE.ROM"
>> 30 EXEC code
>> 40 CLOSE #1
>>
>> RawLd     ldx   #$4000     RAM storage address
>>           lda   #1         select file #1
>>           sta   $6F
>> ldByte    jsr   $A176      read 1 byte from file
>>           ldb   $70        test EOF flag
>>           bne   ldDone     branch if EOF
>>           sta   ,x+        store byte in RAM
>>           bra   ldByte     loop
>> ldDone    clr   $6F        restore console I/O
>>           rts
>>
>> Darren
>>
>> --
>> Coco mailing list
>> Coco at maltedmedia.com
>> https://pairlist5.pair.net/mailman/listinfo/coco
>
>
>
> --
> Brett M. Gordon,
> beretta42 at gmail.com



-- 
Brett M. Gordon,
beretta42 at gmail.com