The Steam version of Tomb Raider 1 won't run with the Rendition exe without the game CD.

Microcode is pretty critical to this and can cause the Verite chip to stall and the responses sent back to the CPU.

A full ucode interpreter's needed for Speedy3D support.

[EDIT] @Raven-05 your full emulation of the Verite register space and ucode interpreter is absolutely critical now [/EDIT]

unfortunately i do have nothing, everything available (which is nothing) is listed me already.

Whiplash has iplogo.bm

RaVeN-05 wrote on 2024-03-12, 09:24:

unfortunately i do have nothing, everything available (which is nothing) is listed me already.

Whiplash has iplogo.bm

Now what you've given me so far is more than enough to go on.

Where does iplogo.bm go? Along with the other *.bm files? It's missing on my system for some reason.

Also I've discovered none of the games will work until microcode emulation is in place. When we get to that point, we could probably do software emulation of the entire thing, including rendering.

Whiplash/fatdata
Make sure youve completed full installation Max mode

I thought did that inside dosbox.

Ok with iplogo.bm there's a looping sound with Whiplash. The graphics obviously don't render. It's probably waiting for a signal from the Verite board to move on to the next step.

V2000 mode for for a V2000 chip is indicated by:
V2000 mode (drawctl[3:0] =0xB), where drawctl is an internal register.

Verite Jump instructions can actually jump to the ROM BIOS as well, which means there's uc there in bits as well as x86 code.

I think the RenUtil call tweaks this register partially:

15.11 VGA_Extend Register
2The VGA_Extend register controls VGA compatibility modes as shown in table 5.11.
3bit Name Description
42:0 Compatibility These bits came with our VGA core and we weren’t absolutely certain we could eliminate
5them, so here they are. Set to 4 by Reset. Do not modify. Read/write.
63 Bandwidth Another historic VGA bit. Cleared by Reset. Do not modify. Read/write.
74 FastMode VGA FastMode.” Set this bit in VGA graphics modes for higher memory bandwidth. Must
8be cleared for VGA text modes. Cleared by Reset. Read/write.

and this:

15.12 Mode Register
2The Mode register controls VGA mode, VESA 2.0 mode and enables DMA as shown in table 5.12.
3bit Name Description
40 VESA_Mode If set, and in native mode, enable the 64K byte memory address space at 0xA0000. Cleared
5by Reset. Read/write
61 VGA_Mode Set for VGA mode. Clear for native mode. Set by Reset. Read/write
72 VGA_32 Enable 32 bit write mode for VGA mode 13.
83 DMA_En Enable DMA accesses. Cleared by Reset. Read/write.

One more SetMode:
https://1drv.ms/u/s!As-dKk-N73dSmEV-zsi_qDLPf4Yw?e=wi5Qvh
MD5: ba4e875274d6a2e489a6cde11315e749

This should dump the full 128 KB BIOS, including the BIOS based microcode. The first 32 KB is at 0xC000:000. This app pages the BIOS in 8K chunks into the VGA address range from 0xA000:0000 to 0xA000:FFFF. A vanilla dump from 0xC000:000 to + 128 KB won't produce the BIOS.

I have trouble making BIOS calls from protected mode with DOS/32A. The V2200 spec doc had an alternative method to page it in.

I hope this works.

i think something wrong with dumping BIOS ROM

You're right.

https://1drv.ms/u/s!As-dKk-N73dSmEbOFfZ3b905FhJ4?e=btoQ6s
MD5: 4a310478b83fee9e5937778a4dbf4ccf

Should maybe fix the problem.

done, still looks like not ROM

Gimme 10 mins.

Try this:

https://1drv.ms/u/s!As-dKk-N73dSmEfW0AiRw9My-lIT?e=uk5QPr
MD5: 19088af1b8a975c437ec4ad37e042ef7

This doesn't do anything fancy, just queries the board and then dumps the BIOS. Maybe some of the other stuff I was messing around with interfered. There're no other port writes than the one to select the page.

i think its mistake, v1000 produced under windows, rest from dos.

Maybe this:
https://1drv.ms/u/s!As-dKk-N73dSmEiDVK3qP8o29X4-?e=vXh26b
MD5: 8f0e879c7af4218c177a275fcd0fe451

I've changed the bank id to be the absolute address of the ROM in Verite space.

same, its file filled by only 0xFF