inofficial MBHP_SID_V4

MIDIbox SID
1

Hi all!

Here’s my version of the SID-Board.

It’s based on two 8580, compatible to the Core32 board and the drivers found in the repository.

Chip select is on J5A, but can be anywhere else.

It only needs a +5V supply, the 9V are generated on board. Also there are output amplifiers

to attennuate the signals to a 1Vpp level, line-out compatible.

The board is 80x50mm, two layer.

I am currently doing a redesign with two 6581 and two 8580 SIDs. More details soon.

Questions, Ideas etc. are welcome.

[MBHP_SID_V4.pdf](< base_url >/applications/core/interface/file/attachment.php?id=7457)

[MBHP_SID_V4_brd.pdf](< base_url >/applications/core/interface/file/attachment.php?id=7458)

2

Update:

inofficial MBHP_SID_V4.1

features:

-supports two MOS8580 and

-swinsid x2 compatible (this is not my brainchild, i solely announce the compatibility. i do not provide the firmware, as this is swinkels’ work)

-makes a total of 4 channels

-logic chips replaced with an altera max7000 cpld to provide greater flexibility

-only requires 5V supply, as the 9V are generated on board

connectors:

4 x SMA (or SMB), one per channel

1 x 2pin external 5V

J5a and J19 for link to MBHP_CORE_32

J5a:

-/CS0 and /CS1: binary chip selects, that get decoded by the cpld

-EN: global enable

-SPARE: not in use yet

J19:

-SCLK, RCLK, SO, SI (standard, si not yet used, might be handy in future for things like reading out sid registers)

Status:

Two PCBs have been produced, one of them has all components placed.

The CPLD-design is still beta, but will be stable before too long (this is caused by size difficulties, maybe a bigger cpld in future versions)

Edit:

IC6 / Pin3 must be on VCC for reliable operation. This corection is the blue wire on the bottom side of the pcb.

Schematics:

Attachement

[MBHP_SID_V42_CPLD.pdf](< base_url >/applications/core/interface/file/attachment.php?id=7530)

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post-7580-127628795184.jpg
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3

That looks pretty cool Luke! Nice and compact 4 x sid(V-sid) beast!

Not sure how i missed this first time round.

4

thanks!

i am still working on the cpld part, trying to find a way to easily provide reading access,

but updates will follow!

5

Hi all!

Here’s my version of the SID-Board.

It’s based on two 8580, compatible to the Core32 board and the drivers found in the repository.

Chip select is on J5A, but can be anywhere else.

It only needs a +5V supply, the 9V are generated on board. Also there are output amplifiers

to attennuate the signals to a 1Vpp level, line-out compatible.

The board is 80x50mm, two layer.

I am currently doing a redesign with two 6581 and two 8580 SIDs. More details soon.

Questions, Ideas etc. are welcome.

Hi, luke

In the your MBHP_SID_V4.pdf file the 74HC595 SRs outs are connected to diferent pins of Sids, than I can saw in the Sid module and in the fnp-sid ( stereo sid ) schems. The first SR in this chain controls a data bus instead of addreses and the second SR controls a address bus instead of data.

Is that realy workable without any software changes?

sorry, may be I am wrong.

Regards,

Janis