New SX-Mini plus

The SX-1 Mini+ is a cost reduced MSX FPGA compatible 100% with the MSX2+ standard. It features VGA/RGB output, stereo audio output, PS/2 keyboard input, 2 DB9 joystick ports, SD card slot and 2 cartridge slots. The unit has a small form factor, about 100x100 mm, and it comes in a 3D printed case.
Internally, the SX-1 Mini+ also features SCC+ sound, FM sound, 2 or 4 Mb RAM mapper, and turbo mode (5,37mhz/8,06mhz). The external cartridge caddy allows the use of any MSX compatible cartridges. Each slot can be also configured as internal MegaSCC+.
You can connect almost any PS/2 keyboard and MSX compatible joysticks (DB9). The unit also includes a SD slot that can be used as mass storage device through BASIC or MSXDOS command line.

TECH SPECS

Altera Cyclone EP1C12Q240C8N FPGA
32Mb SRAM
2x standard MSX Cartridge Slot Connectors
1x microSD Card Slot
D-Sub 15 VGA/RGB video output w/scanlines generator.
3.5mm jack stereo audio output. Switchable tape input
PS2 Keyboard port
2 DB9 joystick port
Fully assembled in a 3D printed case
Mini USB connector for power supply

Attention! Requires at least 2 Amp power supply (not included). 3D printed cases might show imperfections

New "plus" version now includes two regular cartridge slots on-board, two joystick ports and various fixes. Units will be available for preorder really soon!

Relevant link:
8bits4ever info page

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Comments (25)

By KdL

Paragon (1451)

12-07-2020, 12:43

I see with pleasure in the photo that the pull-up resistors are correctly sized at 1K. Great !!

By tfh

Prophet (3346)

12-07-2020, 12:51

Looks good and a very nice price
What does the 3D printed enclosure look like? And what is the quality of the sound-output?

By Haze

Master (151)

12-07-2020, 17:45

I was about to ask regarding the OCM-based fixes, but I see KdL already spotted them on the board. That is good news and makes it an even more attractive product! I wonder if the fixes have also been implemented in any of the new "regular" Zemmix Neo batches from 8bits4ever?

By Gloriou

Master (204)

12-07-2020, 19:35

Very nice size specs and & price
Aaaaaaand out of stock.....

By 8bits4ever

Resident (54)

13-07-2020, 00:57

KdL wrote:

I see with pleasure in the photo that the pull-up resistors are correctly sized at 1K. Great !!

Yes, we have included the fixes you published on twiter (1K Pull ups on WAIT and INT)

tfh wrote:

Looks good and a very nice price
What does the 3D printed enclosure look like? And what is the quality of the sound-output?

We are working on the case right now. Pictures will follow. Sound output should be the same as in the Zemmix or the regular SX-1 ITX.

Haze wrote:

We perform the fix mods on the Zemmix only by request. We cannot modify the PCB itself because we do not have the sources to do so. The new SX-1 Mini+ has the latest fixes by KdL

Gloriou wrote:

Very nice size specs and & price
Aaaaaaand out of stock.....

It has never been in stock. There will be units for preorder soon (within the next 7-10 days)

By SkalTura

Champion (401)

13-07-2020, 15:55

Awesome !!
I want one...

Is it possible to show the "normal" MSX2+ startup logo instead of the SX1 logo ?

By 8bits4ever

Resident (54)

13-07-2020, 16:11

SkalTura wrote:

Awesome !!
I want one...

Is it possible to show the "normal" MSX2+ startup logo instead of the SX1 logo ?

It is possible if you load the BIOS from the SD

By Briqunullus

Hero (665)

13-07-2020, 17:55

Nice. Are there any functional differences between the regular SX-1 and the SX-1 mini+?

By 8bits4ever

Resident (54)

14-07-2020, 01:39

Briqunullus wrote:

Nice. Are there any functional differences between the regular SX-1 and the SX-1 mini+?

The mini+ only misses the scanlines generator and the composite video jack (you can get composite from an internal header if you really need it).

By SkalTura

Champion (401)

14-07-2020, 07:19

8bits4ever wrote:

It is possible if you load the BIOS from the SD

Cool, thank you.
Can't wait to order one ;-)

By SjaaQ

Champion (375)

15-07-2020, 13:32

Will it be possible to switch between 3.58 and 8,06mhz while the machine is running? Like you can on a 7.14MHz machine?

Edit: NM:
F12: Changes CPU speed between
3.58MHz, 5.37MHz and 8.06MHz

By Haze

Master (151)

16-07-2020, 19:35

Pre-orders are up!

By 8bits4ever

Resident (54)

17-07-2020, 16:26

SjaaQ wrote:

Will it be possible to switch between 3.58 and 8,06mhz while the machine is running? Like you can on a 7.14MHz machine?

Edit: NM:
F12: Changes CPU speed between
3.58MHz, 5.37MHz and 8.06MHz

Yes, you can switch frequency on the fly.

Haze wrote:

Pre-orders are up!

There are only 5 units left from this first (20 units) batch!

By syn

Prophet (2123)

18-07-2020, 10:41

sold out already?

By SkalTura

Champion (401)

18-07-2020, 11:21

So exited to see my name already on the waiting list...
Feels like Christmas morning, seeing the presents under the tree

By GhaleonUnlimited

Supporter (3)

28-07-2020, 19:45

Damn -- do you have any idea when another batch will be available to order/pre-order? Thx!

By bsittler

Master (247)

08-09-2020, 01:27

Mine arrived today, this is a nice little MSX! I think it's replacing the 8bits4ever Zemmix Neo as my usual MSX now due to the convenient size and good compatibility

By SjaaQ

Champion (375)

08-09-2020, 10:31

Congrats. Looks like you have a rare item in MSX world. I still have to wait as I am nr 12 on the list

By Haze

Master (151)

13-09-2020, 23:25

GhaleonUnlimited wrote:

Damn -- do you have any idea when another batch will be available to order/pre-order? Thx!

Looks like pre-orders for the next batch are live!

By OeiOeiVogeltje

Paragon (1433)

16-09-2020, 22:53

aaaand out of stock already

By SkalTura

Champion (401)

06-10-2020, 13:14

UPS delivered my SX-1 Mini+ today...
Only one word applies here: Awesome !!

8bits4ever wrote:

It is possible if you load the BIOS from the SD

But... Zero experience with FPGA MSX... How do I load my own MSX2+ Rom during boot ?
Is there a description about the features of the PFGA MSX ?

By bsittler

Master (247)

07-10-2020, 23:11

You can use mglocm in autoexec.bat to load a (mega)ROM image from the microSD card and start it, maybe this works for your purposes? Not entirely clear what you are hoping to do, though - if this is instead a desire to use a different main/disk/kanji/FM ROM set there is a toolchain from kdl (OCM-SDBIOS) that allows this to be loaded from microSD with a special filename provided it's the very first entry in the directory

By SkalTura

Champion (401)

08-10-2020, 09:46

I would like to see the normal MSX2+ boot logo instead of the SX-1 logo...

By meits

Scribe (6543)

08-10-2020, 10:42

Can't that just be done with the available KDL firmware?

By bsittler

Master (247)

08-10-2020, 16:59

You can do that either by flashing different firmware or by using OCM-SDBIOS

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