AGA! — ZXNet «real.speccy»

From Kirill Frolov To All 10 November 1999

Press RESET immediately, Oleg!

08 Nov 99 10:05, Oleg Golenkoff wrote to All:

OG> 1. How to programmatically distinguish a z80 from a z84

The marking of the processor is Z84000 - this is the Z80.

OG> 2. How to programmatically distinguish AY-3-8910 / 12 and YM2949

AY and YM are distinguished by different values of registers 14 and 15
immediately after turning on the power. AY10 and AY12 can be distinguished
only if port 15 of the register is connected somewhere at AY10.

OG> 3. How to programmatically check the presence/absence: XTR-modem

RTFM doc.

OG> Viccom-modem

Depends on the modem. There is always a connection between tape-out and tape-in.
You can also try to test the bell circuit.

OG> CDOS-modem

See diagram. Probably like Vicomm, only there seemed to be feedback in the digital part.

OG> HAYES-modem

Well, damn it, it's a strange question.

OG> General Sound

Read the doc.

OG> SounDrive(?)

NO WAY. This is Covox!

OG> CMOS clock

Also a strange question.

OG> CACHE (16/32)

Enable via IN (0FBh) andtest your memory. 32kb are switched
as ROM banks 48/128.

OG> 4. How to programmatically check the stability of the data bus

Catch the IM2_TEST.ZiP file in ZX.SPECTRUM and look.

OG> 5. How to programmatically check the health of RAM

Hmm... Tests with ones, zeros, one bit with a shift, a random
value. Well, and a regeneration test. See the file iRAMtest.ZiP.

OG> PS in ZX.SPECTRUM. By the way, what is the difference between CMOS according to Gluck and CMOS on Scorpion?

In Scorpion, access to it via ()() is made.

Kirill Frolov. [ZX]

From Oleg Golenkoff To All 10 November 1999

KF> RTFM doc.

WHERE? (do not send to the stars... :) (ts) SPECTROPHONE)

OG>> Viccom-modem
KF> Depends on the modem. There is always a connection between tape-out and tape-in.
KF> You can also try to test the bell circuit.

It would be advisable to get acquainted with an example of how it works...

OG>> CDOS-modem
KF> See the diagram. Probably like Vicomm, only there seemed to be
KF> there was feedback in the digital part.

I see...

OG>> HAYES-modem
KF> Well, damn it, it's a strange question.

Yeah! couldn't be weirder :( but still... :)

OG>> General Sound
KF> Read the doc.

Give me the doc plz, I'll read it... :)

OG>> SounDrive(?)
KF> NO WAY. This is Covox!

FIXED! :(

OG>> CMOS clock
KF> Also a strange question.

But still?

OG>> CACHE (16/32)
KF> Enable via IN (0FBh) and test the memory. 32kb are switched
KF> like ROM banks 48/128.

FIXED!

From Dmitry Lomov To All 11 November 1999

OG> Give the doc plz, I’ll read... :)

zx-news of some kind ;)

All the best.
Dmitry.

... LD..X-TRADE... [ZX]

From Kirill Frolov To All 12 November 1999

OG> I'm sorry! I asked _PROGRAMMON_ !!!!!!!!!!!!!!!!
OG> Since some tests say that I have exactly this one, in general
OG> are there any documents on it?

You don’t understand! The Z84 processor DOES NOT EXIST!

Z8400 is the standard designation for the Z80!
Find the Zilog Z80, it will say Z8400!

The remaining letters and numbers encode the version
(military, extended, regular), case type, speed
characteristics.

The only possible difference is instead of OUT (C),0
will be OUT (C),FF on high-speed computer processors.

Soviet processors do not apply here.

From Kirill Frolov To All 12 November 1999

DL> zx-news some ;)

Scope ZX-Format, number

Kirill Frolov. [ZX]

From Musa Khaybullin To All 15 November 1999

DL>> some kind of zx-news ;)

Sincerely, Musa Khaybullin.

From Kirill Frolov To All 19 November 1999

OG>>>>>> General Sound
KF>>>>> Read the doc.
OG>>>> Give me the doc plz, I’ll read it... :)
DL>>> some kind of zx-news ;)
KF>> More like ZX-Format, numbers 5..8.