To me with just guessing. The G are ground. The R is reset, the K is KB lock, the T is Turbo sw and the L is Power LED. SP is speaker...
So reset is R to G, Power Led is L to G, etc.
What are the letters hidden by jumper on J6 ?

Horun wrote on 2023-02-25, 23:48:

To me with just guessing. The G are ground. The R is reset, the K is KB lock, the T is Turbo sw and the L is Power LED. SP is speaker...
So reset is R to G, Power Led is L to G, etc.
What are the letters hidden by jumper on J6 ?

Thanks for the tips.
Above the J6 there is probably a "TL". (From the first picture, because I'll have access to the board again on Tuesday.)

lizageza wrote on 2023-02-26, 00:49:

Horun wrote on 2023-02-25, 23:48:

To me with just guessing. The G are ground. The R is reset, the K is KB lock, the T is Turbo sw and the L is Power LED. SP is speaker...
So reset is R to G, Power Led is L to G, etc.
What are the letters hidden by jumper on J6 ?

Thanks for the tips.
Above the J6 there is probably a "TL". (From the first picture, because I'll have access to the board again on Tuesday.)

Ok if it TL that could be Turbo LED and should not be jumped until we figure out exact what it is....or it could be for a Turbo switch...and the other TL Turbo LED...
added: The AMD 8088-1 can run at 10Mhz so the board would be considered a Turbo XT. With 30Mhz Xtal it seems on par with some other Turbo XT's...

This is very late XT clone. 88 date codes on few TTLs and ROM, 89 date code on crystal.

>ACER 710 MT86G011 Chip - Cross reference using a
MT86GOll chip. The following functions are incorporated
within the chip:
• 82C88 Clock Generator
• 82C37 DMA Controller - channel 0 is used for refresh.
• 82C59 Interrupt Controller - 8 channels
• 82C53 Timer
• 82C55 Peripheral I/O
• Parity Check Circuit
• Wait-state Logic
• ROM Decoder - 2764/27256 or 27256/27256
• RAM Decoder - 256K or 1 Mb DRAMs
• EMS Extension Memory Bank function
• HfW and SjW CPU Speed Change function
• 4.77l\1Hz DMA Clock

I have DTK MBX-1101 which is the same everything but different ICs placement.
Mentioning it in case you need some cross reference later.

doesnt DTK MBX-1101 have a chip labeled "ACER M1101"? https://minuszerodegrees.net/xt_clone_bios/xt_clone_bios.htm
It does look like the same thing on the first glance.

There is also this: https://forum.vcfed.org/index.php?threads/tur … -turbo.1218365/

also Volleman MB-088 https://forum.vcfed.org/index.php?threads/rev … rboard.1213602/

and maybe Pravetz 16? https://bazar.bg/obiava-39532964/pravets-16-dano-i-5-platki
nope, pravets 16 is just a clone board based on some NEC chip

There are 2-3 designs that everybody copied from for their branded Turbo XT assemblies.
Also, there are 2-3 highly integrated chipsets that everybody relabeled "as they see".
So, many motherboards look very similar.

DTK BMX-1101

Pravets 16 is a cloning, a 1:1 carbon copy really, of Juko XT.
That board is different than Acer M1101 based designs.