First post, by Old Thrashbarg
I snagged a CMS-401 MPU card for cheap off eBay a couple weeks ago, and since I now have a Roland MT-100 on the way (also acquired for cheap 😁 ), I figure it's about time I look into setting this card up.
Here's the problem, though... my card is almost identical to the ones I've seen discussed various places online, except for one detail: mine does not have the address and IRQ jumper headers populated. Instead, it just has the empty pads, and traces hardwired to particular settings.
Here's what I mean:
(I've mentioned before, but I'll say it again: I hate my POS camera. That's the clearest picture I could get out of it, and even that took a dozen tries. 😠 ) Anyhow...
The IRQ setting seems fine the way it is... it looks to be wired for IRQ 2/9. What's throwing me off, though, is the address setting. What little documentation I can find about the card indicates that setting is gives an address of 3e0h, which is rather strange.
I know at least a couple people on here own (or have owned) one of these cards, I've seen 'em mentioned here before, so I'd like to ask for some confirmation here... to set it to the standard 330h address, I need to bridge positions 2 and 3, right? What about position 0... on the cards with the header pins installed, is that one shorted even without a jumper on it, or do I need to cut that trace?