One chip MSX improvement project

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By KdL

Paragon (1436)

KdL's picture

19-01-2013, 16:25

Yep, thanks! The actual flow of improvement of 1chipMSX is started with the ZEXALL compliancy of CPU.
Now I think that the priority of my todo list is to improving the compatibilty of VDP and not other.
Step by step we will come to perfection... or at least I think!!! Murdoch

By Alexandre_Taito

Champion (325)

Alexandre_Taito's picture

08-02-2013, 04:36

Dear Caro
First, I have no words to thank you for the MSX OCM port for the DE0 and DE1 boards.

I have a request, in name of all Brazilian users: Mind in implement the megaRAM memory interface into DE0/DE1 code?

Most brazilian programs (not only games) are tied to megaRAM specification, so mostly nothing we made (since it was the "de facto" standard of memory expansion in Brazil) can run on OCM.

Thanks a lot, remember me to pay you a beer when you come to Brazil!

By caro

Champion (512)

caro's picture

08-02-2013, 20:22

Okay, but I want to look at the specification of megaRAM that you have used. Give a link or send to my e-mail.

By x-nen Aivalahostia

Paragon (1484)

x-nen Aivalahostia's picture

09-02-2013, 13:32

hello, i test some hardware on my Altera DE1:
-Sunrise Ide-ata: works fine (i test only hard disk alone)
-Sony hbk 30 disk controller and floppy drive: works fine
-Padial sd + 4mb: works fine disabling sw2.
-Midi pac: works fine
-Plausoniq: master system games don't start Sad

Thanks

By RetroTechie

Paragon (1563)

RetroTechie's picture

09-02-2013, 18:48

@Caro: mail with MegaRAM info sent.

MegaRAM works very similar to some 8K ROM mappers, but with addition of an I/O port to select between "write enable mode" and "block switch mode". Maybe some hybrid construction could be made that doubles as 8K ROM mapper and MegaRAM, or ESE-SCC and MegaRAM? Question Doesn't need to be perfect as long as software that uses either, works normal.

By caro

Champion (512)

caro's picture

16-02-2013, 10:08

Alexandre_Taito wrote:

Mind in implement the megaRAM memory interface into DE0/DE1 code?

Updated relize OCM on DE1 from 16.02.13 http://www.caro.su
---------------------------------------
Added emulation of memory modules MegaRAM Volume 512 Kb,
connected to slot 1. Setting the switch Sw(8) 1 (up) includes
MegaRAM in Slot1, regardless of the position of the switch Sw(3).
In the lower position Sw(8) mode Slot1 will depend on the state Sw(3).

By Alexandre_Taito

Champion (325)

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16-02-2013, 11:10

Thanks a lot, Caro!!! The Brazilian MSX comunity thanks you!!! Running Naked in a Field of Flowers
Will it be implemented on DE0?

By caro

Champion (512)

caro's picture

16-02-2013, 17:41

Alexandre_Taito wrote:

Will it be implemented on DE0?

Already there: http://www.caro.su

By Alexandre_Taito

Champion (325)

Alexandre_Taito's picture

16-02-2013, 19:17

Thanks a lot, Caro!!! Running Naked in a Field of Flowers

By vanfanel

Champion (446)

vanfanel's picture

17-02-2013, 15:15

Sorry to repeat Alexandre's words but... thanks a lot, Caro! Big smile

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