[Coco] CoCoSDC and Extended ADOS3

[William Astle]

First of all, you would use &H2000 as your argument for WRITE MEM 
because that's the first address of your image, but that shouldn't be 
what's causing the FC error.

You should check the documentation for WRITE MEM to make sure you have 
the arguments right (right order, etc.) and there aren't any 
restrictions on where the ROM image can be located or the maximum size 
you can flash at once.

On 2016-11-18 12:52 PM, Ron Klein wrote:
> I tried the alternate take on the PCLEAR way but continue to get an FC
> error anytime I try to flash the CoCoSDC:
>
> PCLEAR1
> CLEAR 200,&H1FFF
> LOADM"EPROM.BIN"
> KILL MEM @7
> WRITE MEM @7,&H1FFF,&HC000,16384-256
>
> Argh!
>
> -Ron
>
>
>
> On Fri, Nov 18, 2016 at 1:39 PM, William Astle <lost at l-w.ca> wrote:
>
>> I wonder if it has occurred to anyone to just load the file with an offset
>> so it loads at &H4000? Then the CLEAR command, etc., in the sequence would
>> be sufficient. If the file loads by default at &H2000, then you can add an
>> offset of &H2000 to load it to &H4000:
>>
>> LOADM"EPROM.BIN",&H2000
>>
>> However, for complete correctness you should use &H3FFF, not &H4000 since
>> the address sets the highest address DECB will use, not the first address
>> of the reserved area. It will probably work fine due to a fluke about how
>> things get set up related to string space, but to be completely correct,
>> you should set the address correctly.
>>
>> The other suggestion of a PCLEAR1 first and use &H1FFF (adjusted for
>> correctness) as the CLEAR argument should also work. You're getting the OM
>> error because you're trying to put the top of memory for DECB below the top
>> of the PMODE graphics pages. If you do go that route, you'll have to adjust
>> the argument to your WRITE MEM command to match where ERPOM.BIN loads or
>> you'll be writing the top half of the ROM image followed by 8K of junk to
>> the flash.
>>
>>
>> On 2016-11-18 12:12 PM, Ron Klein wrote:
>>
>>> Hi Art,
>>>
>>> Changing the CLEAR statement to:
>>>
>>> CLEAR 200, &H2000
>>>
>>> ... results in an ?OM ERROR
>>>
>>>
>>> Changing the CLEAR statement to:
>>>
>>> CLEAR 200, &H7000
>>>
>>> ... results in crashing the Coco 3 after doing a LOADM "EPROM.BIN"
>>>
>>>
>>>
>>> On Fri, Nov 18, 2016 at 1:00 PM, Arthur Flexser <flexser at fiu.edu> wrote:
>>>
>>> Ron, your CLEAR 200,&H4000 statement will plop the stack in the middle
>>>> of the region reserved for the code you are loading in, so that the
>>>> stack will get overwritten by the code, which does not bode well at
>>>> all.  Try using $2000 or $7000 instead of $4000.
>>>>
>>>> Art
>>>>
>>>> On Fri, Nov 18, 2016 at 1:46 PM, Ron Klein <ron at kdomain.org> wrote:
>>>>
>>>>> Hi Art,
>>>>>
>>>>> That's how I was treating it, but seem to be getting an FC error when
>>>>> attempting to flash it to the CoCoSDC.
>>>>>
>>>>> I do the following:
>>>>>
>>>>> KILL MEM @7
>>>>> CLEAR 200,&H4000
>>>>> LOADM"EPROM.BIN"
>>>>> WRITE MEM @7,&H4000,&HC000,16384-256
>>>>>
>>>>> I get the following error:
>>>>>
>>>>> ?FC ERROR
>>>>>
>>>>> Not sure what the issue is as the SYNTAX is correct.  I'm thinking it
>>>>> has
>>>>> something to do with the addresses.
>>>>>
>>>>> Mike Rowan brought up the binary header and footer information as being
>>>>> a
>>>>> possible issue.
>>>>>
>>>>> Thanks
>>>>>
>>>>> -Ron
>>>>>
>>>>>
>>>>> On Fri, Nov 18, 2016 at 12:35 PM, Arthur Flexser <flexser at fiu.edu>
>>>>>
>>>> wrote:
>>>>
>>>>>
>>>>> Ron, I'm not sure if this is what you need, but...
>>>>>>
>>>>>> The EPROM.BIN file starts at $2000, but it is like a cartridge that
>>>>>> would ultimately reside at $C000.  So, whatever method you'd use for a
>>>>>> cartridge file of 16K should be applicable to it.
>>>>>>
>>>>>> Art
>>>>>>
>>>>>> On Fri, Nov 18, 2016 at 11:58 AM, Ron Klein <ron at kdomain.org> wrote:
>>>>>>
>>>>>>> Hello everyone,
>>>>>>>
>>>>>>> I've been wanting to use ADOS again and went through the steps to
>>>>>>>
>>>>>> create
>>>>
>>>>> a
>>>>>>
>>>>>>> customized EPROM.BIN for Extended ADOS3.  I'm trying to figure out the
>>>>>>> correct method for flashing this BIN to bank 7 of the CoCoSDC and
>>>>>>>
>>>>>> confused
>>>>>>
>>>>>>> by the start and ending addressing required for this 16K ROM and how
>>>>>>>
>>>>>> to
>>>>
>>>>> tell it to use bank 7.
>>>>>>>
>>>>>>> Is anyone else using ADOS/Extended ADOS3 with their Coco 1,2 or 3 and
>>>>>>>
>>>>>> a
>>>>
>>>>> CoCoSDC?
>>>>>>>
>>>>>>> Thank you!
>>>>>>>
>>>>>>> -Ron
>>>>>>>
>>>>>>> --
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>>>>>>> https://pairlist5.pair.net/mailman/listinfo/coco
>>>>>>>
>>>>>>
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>>>
>>
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>