AX-230 photos/ROMs - How to update WiKi and BlueMSX?

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By mars2000you

Enlighted (5372)

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13-06-2018, 14:37

Put the Arabic ROM in the correct order (mapped as in AX-170) of make it mirroring (in blueMSX, it works)

(I thought you would have guessed that after my explanation about the 128kB dump)

By Manuel

Ascended (14671)

Manuel's picture

13-06-2018, 14:39

How exactly should it mirror? Block 0 and 1 are BASIC/BIOS, block 2 and 3 are mapped to page 2 and 1 respectively. I thought that is what you meant. So I don't know what is wrong...

By mars2000you

Enlighted (5372)

mars2000you's picture

13-06-2018, 14:47

My guess is that the 64kb dump of slot 1 will give you the Arabic rom in the correct order as on the AX-170.

By Manuel

Ascended (14671)

Manuel's picture

13-06-2018, 14:46

Ah, I see the mistake... wrong offset in the EPROM dump! Sorry!

The full slot 1-0 dump will reveal whether there is indeed mirroring.

By mars2000you

Enlighted (5372)

mars2000you's picture

13-06-2018, 14:49

Mirroring is probably non-requested (in blueMSX, AX-170 works with the Arabic rom 'normal' 4000-BFFF or mirrored). But without the mirroring, you need to have the rom in the correct order, starting with the AB signature.

By Tabajara-Labs

Expert (85)

Tabajara-Labs's picture

13-06-2018, 15:01

Oh my...Another 30-year mistery solved.
The machine has 64KB of ram.
I was following the Expert DD-Plus schematic, and it has the memories wrongly named.
In the schematic, VRAM is RAM and vice-versa.
So, the AX230 has 64K of RAM and a 32K PSRAM chip is being used as video memory.

:\

By Manuel

Ascended (14671)

Manuel's picture

13-06-2018, 15:13

OK, so can you please run saverom.com and save all subslots of slot 1 and 3, please?

By Tabajara-Labs

Expert (85)

Tabajara-Labs's picture

13-06-2018, 16:08

By mars2000you

Enlighted (5372)

mars2000you's picture

13-06-2018, 17:14

@Manuel: I'll send you later the more recent dumps.

* The megarom is confirmed in slot 3-3 by SAVEROM
* The 64kB RAM is confirmed in slot 3-0 by SAVEROM
* The Arabic ROM is in the good order from 4000 to BFFF without mirroring in slot 1 (confirmed by full 64kB dump of this slot)

By Manuel

Ascended (14671)

Manuel's picture

13-06-2018, 22:14

Thanks, all is fine now. Just wondering what is the serial number, for reference in the XML file. Then we know on which machine the file was based.

See https://github.com/openMSX/openMSX/blob/b84dbac19007a7f985f8... for the result.

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