Re: BCC, ELKS 24 Bit addressing mode

[Serdar Sutay <serdar.sutay@sentvion.com>]

Segin wrote:
> Serdar Sutay wrote:
>
>> Dear All,
>>
>> I am porting ELKS to a special version of 80186 to be used in 
>> embedded devices. This special version known as Turbo186 is using 24 
>> bit addressing using a special addressing scheme. So I need to modify 
>> bcc or as86 to support 24 bit addressing mode.
>>
>> This type of operation is common in embedded usage. 24 bit addressing 
>> is working like this,
>>
>> In normal 20 bit addressing when far jumps are used, two 16 bit 
>> operands are given for address calculation. First operand is left 
>> shifted 4 bits and added to second operand, then 20 bit address is 
>> calculated.
>>
>> In 24 bit addressing mode, first operand is left shifted 8 bits and 
>> added to second operand, resulting in 24 bit address.
>>
>> What am I required to do to support 24 bits addressing in bcc? Can 
>> you give me some insight or guide me to the correct person?
>>
>> Thank you for your consideration and help.
>>
>> Kindest regards,
>>
>> Serdar Sutay
>> -
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> Basically you're working with a 286 that's been lobotmized down to a 
> 186 with the addressing features in place?
>
>
yes, but I need to address 16 Mbytes of RAM so I need to use 24 bit 
addressing mode.

Can Bcc compiler handle this automatically?