New SX-Mini plus

New SX-Mini plus

by hamlet on 12-07-2020, 12:21
Topic: Hardware
Languages:

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

Media browser (2)

  • New SX-Mini plus
  • New SX-Mini plus

Comments (16)

By KdL

Paragon (1305)

KdL's picture

12-07-2020, 12:43

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

By tfh

Prophet (2315)

tfh's picture

12-07-2020, 12:51

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

By Haze

Expert (103)

Haze's picture

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 (152)

Gloriou's picture

12-07-2020, 19:35

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

By 8bits4ever

Resident (45)

8bits4ever's picture

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 !! LOL!

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 Smile
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:

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?

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

Master (204)

SkalTura's picture

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 (45)

8bits4ever's picture

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

Expert (73)

Briqunullus's picture

13-07-2020, 17:55

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

By 8bits4ever

Resident (45)

8bits4ever's picture

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

Master (204)

SkalTura's picture

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

Expert (119)

SjaaQ's picture

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

Expert (103)

Haze's picture

16-07-2020, 19:35

Pre-orders are up!

By 8bits4ever

Resident (45)

8bits4ever's picture

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

Paragon (1966)

syn's picture

18-07-2020, 10:41

sold out already?

By SkalTura

Master (204)

SkalTura's picture

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 Wink

By GhaleonUnlimited

Supporter (3)

GhaleonUnlimited's picture

28-07-2020, 19:45

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