MT-32 1.x ROM upgrade to 2.x possible? \ VOGONS

MT-32 1.x ROM upgrade to 2.x possible?

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First post, by Vlcice

Posted on 2019-05-26, 23:49

Vlcice Offline

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Rank: Newbie
Posts: 1
Joined: 2011-02-13, 07:37

I have a first-model MT-32 (no headphone jack). It chokes on certain SysEx commands created for later-model units which are spaced too closely-together. Is it possible to upgrade the ROMs to the 2.x ROMs from the later board to fix this? I'm not sure if the later ROMs are dependent on the later hardware; maybe the relaxation of the 40ms spacing between commands requires more RAM or other hardware differences?

Reply 1 of 1, by sergm

Posted on 2019-05-27, 05:40

sergm Offline

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Rank: Oldbie
Posts: 937
Joined: 2011-02-23, 16:37

AFAICT, the "old" and the "new" MT-32 versions differ significantly in the addresses used for hardware ports (e.g. the LA32 ports), so the control ROM version can only be upgraded along with the main board (as per the MT-32 Service Notes too).

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