[Coco] Devastated. Long term OVCC project falls short

[Walter Zambotti]

> Just curious -- is this plain-old 16-bit x86 assembly? Or 32-bit
> x86? Or is it x86_64 assembly?

It is 64 bit. However I try to avoid using the 64 bit instructions as 
much as possible.

Here is an example of one of the instructions:



PUBLIC Neg_D_A ; Op 00 - Negate DP memory byte
Neg_D_A PROC
MEMADR EQU 2
VAL EQU 4
     sub rsp, 28h
     ; Calc Address by Adding the Byte at [PC++] with DP reg
     mov cx, word ptr [pc_s]
     inc word ptr [pc_s]
     call MemRead8_s
     mov cx, word ptr [dp_s]
     or cx, ax
     ; Save Address and use it to get a mem byte
     mov word ptr [rsp+MEMADR], cx
     call MemRead8_s
     ; Negate the byte and save the FLAGS
     neg al
     ; Save flags CF+VF+ZF+NF
     setc byte ptr [cc_s+CF_C_B]
     seto byte ptr [cc_s+VF_C_B]
     setz byte ptr [cc_s+ZF_C_B]
     sets byte ptr [cc_s+NF_C_B]
     ; Write negated byte (al) to address (saved on stack)
     mov cx, ax
     mov dx, word ptr [rsp+MEMADR]
     call MemWrite8_s ; dx - address, cx - byte
     add rsp, 28h
     ret
Neg_D_A ENDP


Walter

On 10/4/19 10:08 PM, John W. Linville wrote:
> On Fri, Oct 04, 2019 at 12:06:05PM +0800, Walter Zambotti wrote:
>
>> The 6309 turbo feature is a reworking of the 6309 cpu emulator written in C
>> rewritten in X86 assembly.
> Just curious -- is this plain-old 16-bit x86 assembly? Or 32-bit
> x86? Or is it x86_64 assembly?
>
> John