BeerIDE emulation with LBA support?

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Enlighted (6067)


02-12-2022, 02:26

gdx wrote:

I no longer create multiple partition since i use FAT16. That's probably why I don't have any problems.


from hardware point of view ie. HBI-55 (4k memory expansion) is just as much IDE interface than Beer IDE is.

There is undoubtedly the same problem with the I/O ports. The HBI-55 documentation also says that the ports should not be reversed.

I just mean that there is practically same 8255 compatible chip (also known from being MSX PPI) that handles everything... If you talk to RAM or IDE device, it is just programmers choice.

بواسطة sd_snatcher

Prophet (3659)

صورة sd_snatcher

02-12-2022, 02:50

Prodatron wrote:
sd_snatcher wrote:

@Prodatron, drivers for the SD-Mapper v1 and v2 would also be very welcome. Wink
PS: v1 and v2 have different register sets.

Are these new hardware?

Being "new" is relative in this case. But you can say that they're somewhat new. 😅 The v1 is from ~9 years ago, and the v2 is from ~3 years ago.

Prodatron wrote:

Mega SD etc is something different? I should have a look at this. Maybe you have a link?

Yes, they're different from the MegaSD. Both are Open Hardware licensed under the CERN OHL. Many different makers, from different countries, are making interfaces based on these designs. It's intended to be libre and have an affordable price.

The older SD-Mapper v1 documentation and Nextor driver sources can be found here.

The SD-Mapper v2 is a complete overhaul of the design, with many improvements to make it more efficient and allow for higher speed. It also supports card hot swap. Its documentation and Nextor driver sources can be found here.

Their Nextor drivers have the documentation about the register set of the respective interface at the very beginning of the file.

The v2 uses an ASCII16 ROM mapper and the SDcard interface register set is only shown at page-7.

بواسطة Prodatron

Paragon (1843)

صورة Prodatron

02-12-2022, 11:06

Thanks, sd_snatcher! Now I remember it, there was already a driver for SymbOS (or an attempt?) for the v1. I will check the sources again. If there is a demand for making a v2 SymbOS driver I can try to do this.

بواسطة Fabio_acrs

Supporter (10)

صورة Fabio_acrs

03-12-2022, 01:09

It wold be nice to have drivers for the sd mapper. Lot's of users around here.

بواسطة ducasp

Paladin (680)

صورة ducasp

03-12-2022, 16:02

I agree, I've seen quite a few people asking about using SymbOS with SD Mapper in Brazilian Facebook MSX groups... I think that there are quite some people using it not only in Brazil, but also overseas, i.e.:

صفحة 3/3
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