MSX without MSX Engine and 128k mapper

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By Jipe

Paragon (1594)

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07-01-2013, 17:50

do you know a MSX1 or MSX2 model with 128k mapper whithout MSX Engine ?

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By flyguille

Prophet (3031)

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07-01-2013, 18:25

why? do you needs to figure out, how to use the 74ls670 chips?

By Jipe

Paragon (1594)

Jipe's picture

07-01-2013, 18:46

i know the 74LS670 chip but i search information or schematic on the /cas signal with a internal 128k mapper

By Eugeny_Brychkov

Paragon (1232)

Eugeny_Brychkov's picture

07-01-2013, 19:14

GR8BIT. MSX2/2+ with no MSX engine chip and 1MB mapped memory.
However it uses SRAMs so no /CAS there.

By Jipe

Paragon (1594)

Jipe's picture

07-01-2013, 19:35

thanks , i know also the sram mapper is more easy
the challenge is upgrade MSX1 with a mapper and DRAM chip

By Eugeny_Brychkov

Paragon (1232)

Eugeny_Brychkov's picture

07-01-2013, 19:42

which machine from which size to which size and are diagrams available?

By Jipe

Paragon (1594)

Jipe's picture

07-01-2013, 20:25

I know no MSX1 or MSX2 with a mapper that did not MSX Engine

I have schematic of mapper in the databook MSX2 + to get an idea but this is just theoretical

By Eugeny_Brychkov

Paragon (1232)

Eugeny_Brychkov's picture

07-01-2013, 20:51

Ok so make it yourself, what's the problem Wink Then it will be very practical in addition to be theoretical. Need help with that?

By msxholder

Champion (399)

msxholder's picture

07-01-2013, 21:28

MSX 2 schematics with no engine and not a mapper sony hb900p

By Manuel

Ascended (19270)

Manuel's picture

07-01-2013, 23:00

msxholder: he is asking with NO engine but WITH mapper, I think. Does the CX5MII/128 have an engine? (It does have a mapper!)

By Jipe

Paragon (1594)

Jipe's picture

08-01-2013, 11:20

CX5MII have a S3527 inside , HB-G900AP have mapper and a S1985 inside , HB-G900P no mapper only 64k inside

i think memory mapper is only present if MSX Engine inside

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