smuc

20 Oct 02 15:45, Yuri Potapov -> All:

YP> I got a subject here, but without a professional ROM, and maybe someone can explain this to me
YP> this question
YP> when the subject is connected, the service monitor does not work
YP> i.e. it is included in it, but when you press the button everything is buggy and crashes
YP> (Conver commander does not start at all)

Strange. Maybe burnt? What version of ROM do you have?

YP> and another question, is it possible to use it only as a real time clock
YP>

Of course. The ports have not gone away.
Moreover, you can work with the screw under the isdos. There is a driver + configurator
for it, working directly through open ports.

YP> Green board + keyboard and mouse controller

Hmm. If the board is an old version, then this needs to be done:

VG needs to be decrypted more strictly. Here is a piece of FM:

When connecting the controller to Scorpion 256 computers (released earlier than March
1996, i.e. not Turbo +), it is necessary to make modifications on the computer's motherboard. To the decoder for accessing TR-DOS ports (chip 1533ID7 DD54
(according to the NPO Graphics-M circuit) connect an additional address signal A0 using
the wiring AND circuit, or using element 2-I (chip 555, 1533LI1).

A1 ────────────────────1─┤A0│ DC│ 0o─15─
A7 ────────────────────2─┤A1│ │1o─14─
/WR ────────────────────3─┤A2│ │ 2o─13─
cut ├──┤ │ 3o─12─
/M1 ──┬──x───┬──────────6─┤ E│ │ 4o─11─
│ │ /DOS ─5─o E│ │ 5o─10─
│┌────┐│ IORQGE ─4─o E│ │ 6o─9──
└┤ & ││ │ │ │ 7o─7──
│ ├┘ └──┴───┴──┘
A0 ───┤ │ LI1 ID7
└────┘

Or like this:
o 5v
│
█ 1kOm
/M1 ──┬──x───┬─┴────
│ │
└──| ──┤ <- this is “mounting AND”
│ Diodes - KD522.
A0 ─────| ──┘

And now the theory.
I quote a piece of FM on the _green_ Scorpio of the latest version:

······------====== Monitor glass cutter ======------······
8. Ports of the TR-DOS system. These ports become available only when switching to a TR-DOS system (DOS- signal = log. 0), and all of the above ports are disabled except for ports ending in 0FDh (for which the A1 address is equal to log. "0"). Sampling of TR-DOS controller ports occurs
at IORQGE-, DOS- = log. 0, M1-, a0, a1 = log. 1.; The bits a5, a6, a7
define the specific port address.
······------====== Monitor glass cutter ======------······

The key phrase here is _a0, a1 = log. 1._
In yellow there was only _a1 = log. 1._

SMUC uses ports like #xxBA and#xxBE, in which a1 also =1, so
at the same time data from them and from the VG climb onto the bus, nothing works from here.

The point of the modification is to eliminate conflicts by entering the address
a0.

YP> into the decryption of the VG on the inscription ZS v3.

Version 1.3

WBR, Jason.

/*e-mail: jason2000(scary dog)yandex.ru ICQ: 62235830*/

/np:/ *silence*