Extended cpu carts

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By msd

Paragon (1510)

Аватар пользователя msd

20-03-2010, 11:47

120nS and 150ns..

By OeiOeiVogeltje

Paragon (1426)

Аватар пользователя OeiOeiVogeltje

20-03-2010, 12:13


No, that's not mine SD interface (i have to finish it yet) This is built by local msx freak
The board is auto-loading cartridge simulator (loads ROM from SD, configures FPGA as appropriate mega- or rom mapper - and go)

its a What???

where can i find more info on this thing??

By Leo

Paragon (1236)

Аватар пользователя Leo

20-03-2010, 12:15


No, that's not mine SD interface (i have to finish it yet) This is built by local msx freak
The board is auto-loading cartridge simulator (loads ROM from SD, configures FPGA as appropriate mega- or rom mapper - and go)

because on my side i am not that skilled for soldering , more "middle age" , look at my on going sd interface + some stuffs :

iledefra01.free.fr/msx/DSC_0777.JPG

By msxegor

Master (183)

Аватар пользователя msxegor

21-03-2010, 21:10

one of my msx'es runs fine without the m1 wait Tongue

really ? what is the acces time rom/Rams ?
actually there is a way to program a wait state generator inside Z280 , but it requires one external ic , during reset some value has to be forced on databus.

I guess that depends on the time AND maker. And parts. I never saw RAM slower than 150ns; some ROMS in older computers were pretty slow, but i'm positively sure that most of MSX* computers made since 1985 can do 10 mhz busclock. At least ones with S3527, 120ns RAM and non-reprogrammable BIOS chips from Yamaha.

By msxegor

Master (183)

Аватар пользователя msxegor

21-03-2010, 21:25



No, that's not mine SD interface (i have to finish it yet) This is built by local msx freak
The board is auto-loading cartridge simulator (loads ROM from SD, configures FPGA as appropriate mega- or rom mapper - and go)

its a What???
where can i find more info on this thing??

http://zx.pk.ru/showthread.php?t=10713 - original thread;
the guy who made it appears on this site too - AlexBel.

By sd_snatcher

Prophet (3642)

Аватар пользователя sd_snatcher

29-03-2010, 00:28

i got a stock of Z280 for 3 us dollar each, cheaper than some 74LS's !!!

Hi Leo! Where did you found the Z280?

By Leo

Paragon (1236)

Аватар пользователя Leo

30-03-2010, 10:43

ut ressources .com , among others , they are based in singapore , you must ask for quote so price can vary.
You 23 euros pay VAT when you receive package . the ship cost are 28$ (DHL) , so you may want to order a whole bunch of them.
There are sites and others stocks , 9000 pieces around , but prices can go up to 7$.
if you want just one i have many ...

Smile

By Leo

Paragon (1236)

Аватар пользователя Leo

25-11-2010, 05:58

i got z180/33MHz for 2usd each , did not received them yet and i suspect them to be not new & used.

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