One chip MSX improvement project

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By KdL

Paragon (1219)

KdL's picture

21-06-2016, 01:46

The turbo speed 8MHz is not a real frequency but a yield calculated by a benchmark
(8MHz is the max yield that you can obtain by a clock of 10MHz).
The official turbo clock 10MHz is the same of turbo speed 8MHz.
Indeed all the frequencies are obtained by a slowdown of the main clock 21.48MHz.

By jltursan

Prophet (2147)

jltursan's picture

21-06-2016, 16:10

So with these BASIC lines you already get the max speed provided, nice!
I suppose you can't get the full 21.48Mhz...

By KdL

Paragon (1219)

KdL's picture

25-06-2016, 17:13

jltursan wrote:

So with these BASIC lines you already get the max speed provided, nice!
I suppose you can't get the full 21.48Mhz...

8MHz not more!

Note that the frequency of 10 MHz has been slowed to solve compatibility issues.
Currently the emulation model does not allow to go with a full clock of 10 MHz.

By jltursan

Prophet (2147)

jltursan's picture

25-06-2016, 18:35

Cool enough!; but sometimes could be nice to get the full speed, does the compatibility suffers a lot due this??, the original implementation mostly works and can reach that 10Mhz.
Some software can benefit from this...

Btw, what happens with the SW6?, is it overrided by the software setting?.

By KdL

Paragon (1219)

KdL's picture

27-06-2016, 00:06

In truth the original implementation is 8 MHz and if you remove the slowdown timer then it hangs!
The DIP-SW6 is documented inside of OCM-PLD Pack v3.2

By jltursan

Prophet (2147)

jltursan's picture

27-06-2016, 19:00

Thanks for the info KdL!. Maybe it's time to flash my OCM, believe it or not, it's still in its original state oO

By AxelStone

Prophet (2664)

AxelStone's picture

27-06-2016, 20:51

jltursan wrote:

Thanks for the info KdL!. Maybe it's time to flash my OCM, believe it or not, it's still in its original state oO

Original 1Chip BIOS? Update now!! Tongue

By jltursan

Prophet (2147)

jltursan's picture

27-06-2016, 21:32

Quote:

Original 1Chip BIOS?

I promise you!.

I'll check carefully the update procedure (must be inside the OCM-PLD pack) and I'll take the chance soon Smile

By KdL

Paragon (1219)

KdL's picture

27-06-2016, 23:28

1Chip BIOS ? the firmware is not the BIOS Wink eheh

By spl

Paragon (1461)

spl's picture

31-08-2016, 09:55

Any news about updates of 1chipMSX? Last version is OCM-PLD v3.3 RC3 (2014.11.24)

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