Great find, that $800 bytes part is missing on 94-95 code. It must be the instruction set or code for the tpu. Italso is placed on a non shared memory region with eside. I guess on 94-95 version it is hard built. Later it is configurable.
Now I found some differences that might help you.
16FC is loaded with 004C vs 0044. than a pause is executed. It might be processor reset or mode change for reset the shared memory.
16F0 is not set vs loaded with #0003 before the microstore is loaded and than cleared after that.
It might be set bit that unlocks eside access to TPU non shared memory region.
Than the microstore is loaded. We will have to find where in the TPU ram that is stored to get the processor`s correct offset.
That looks like instructions code, or the main core that the TPU runs from. Make a byte repeat analysis to find the opcodes. If we can find the correct offset and the instruction set a disassembly can be made.
Thatis the other main change the size and address is the same but data slightly differs.
vsCode:fdb $84 ; a6b4-a704 cal data 1600-??? for tpu RESERVED:A6B6 fdb $CD RESERVED:A6B8 fdb $279 RESERVED:A6BA fdb $379 RESERVED:A6BC fdb $479 RESERVED:A6BE fdb $579 RESERVED:A6C0 fdb $679 RESERVED:A6C2 fdb $779 RESERVED:A6C4 fdb $879 RESERVED:A6C6 fdb $9C1 RESERVED:A6C8 fdb $AC1 RESERVED:A6CA fdb $B5 RESERVED:A6CC fdb $77 RESERVED:A6CE fdb $7B RESERVED:A6D0 fdb $A2 RESERVED:A6D2 fdb $A6 RESERVED:A6D4 fdb $1A RESERVED:A6D6 fdb $11A RESERVED:A6D8 fdb $21A RESERVED:A6DA fdb $31A RESERVED:A6DC fdb $41A RESERVED:A6DE fdb $51A RESERVED:A6E0 fdb $61A RESERVED:A6E2 fdb $71A RESERVED:A6E4 fdb $8C8 RESERVED:A6E6 fdb $9C8 RESERVED:A6E8 fdb $AC8 RESERVED:A6EA fdb $BC8 RESERVED:A6EC fdb $C93 RESERVED:A6EE fdb $D93 RESERVED:A6F0 fdb 0 RESERVED:A6F2 fdb 0 RESERVED:A6F4 fdb $F38 RESERVED:A6F6 fdb $E91 RESERVED:A6F8 fdb $BB RESERVED:A6FA fdb 0 RESERVED:A6FC fdb $EA9 RESERVED:A6FE fdb 0 RESERVED:A700 fdb 0 RESERVED:A702 fdb 0
Code:RESERVED:7AFC fdb $8E ; table RESERVED:7AFC ; 7AFC-7B4B RESERVED:7AFC ; INITIAL VALUES LOADED FOR 1600-1650 at reset RESERVED:7AFE fdb $CC RESERVED:7B00 fdb $2DE RESERVED:7B02 fdb $3DE RESERVED:7B04 fdb $4DE RESERVED:7B06 fdb $5DE RESERVED:7B08 fdb $6DE RESERVED:7B0A fdb $7DE RESERVED:7B0C fdb $A7 RESERVED:7B0E fdb $8F RESERVED:7B10 fdb $D0 RESERVED:7B12 fdb $D7 RESERVED:7B14 fdb $D8 RESERVED:7B16 fdb $76 RESERVED:7B18 fdb $AF RESERVED:7B1A fdb $DD RESERVED:7B1C fdb $33 RESERVED:7B1E fdb $133 RESERVED:7B20 fdb $233 RESERVED:7B22 fdb $333 RESERVED:7B24 fdb $433 RESERVED:7B26 fdb $533 RESERVED:7B28 fdb $633 RESERVED:7B2A fdb $733 RESERVED:7B2C fdb $8C6 RESERVED:7B2E fdb $9C6 RESERVED:7B30 fdb $AC6 RESERVED:7B32 fdb $BC6 RESERVED:7B34 fdb $CC6 RESERVED:7B36 fdb $DC6 RESERVED:7B38 fdb 0 RESERVED:7B3A fdb 0 RESERVED:7B3C fdb $FE4 RESERVED:7B3E fdb $C1 RESERVED:7B40 fdb $6E RESERVED:7B42 fdb $C4 RESERVED:7B44 fdb $E92 RESERVED:7B46 fdb $E85 RESERVED:7B48 fdb $AA RESERVED:7B4A fdb $5C
I will try to find a bin for the diesel PCM and see how TPU is set there.
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