[Coco] CoCoSDC and Extended ADOS3

[Ron Klein]

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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>>>>>>
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>>
>
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