AY-Track: IRONMAN TOXICOMANIA (VOL.2)
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(C) AXLR
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Refinement Pentagon'a for
with high-density disks
So, what should I do to earn a regular controller with
drives high density? If your computer has already installed the
turbo mode, then all the improvements takes literally an hour,
and if not, why - - Is proposed here is a modified scheme of
turbo for the Pentagon - collect.
So, even if you already have turbine
is, it will have a bit to finish. In fact, improvements are
two: one to activate the turbo when running DOS, the other
forms / wait for the processor to handle ports.
On the latter should say especially. Noted that some
instances of KR1818VG93 namely, 1993 and later model year, do
not work in Turbo. The quality of exchange with the disk is
like and does not affect (Not specifically tested), but who is
it VGshku knows.
Would be best to bring the full scheme
turbo for the Pentagon, but with modifications:
* 100pF
LA3 TM2 and TM2-free items
=== LA3 can be found on board
D3: 2 '° 13 ° R company
D3: March 12 D _
11 / C Q ° 8> D5: 2
D10: December 10 ° S
D15: 5
+5 V
DD1 +5 B
D45: March 2 A0 K47
+5 V 5 A1
Y0 4> Z80: 6
D2: September 3 B0 K10
B1 Y1 6 7> Z80: 1924
+5 DD3.1 1 S
15 ° OE
1 ° R
2 D _
3 / C Q ° 6
4 ° S
DD4.2
/ Bit7 # FF 4 1 6
D76: May 9
+5 DD5.1 DD4.3 "NORMAL"
S1
HLD 1 ° R _ 13 January 1911
2 D Q ° June 1912
/ IP 3 / C
4 ° S DD6.1 "TURBO"
1 '3
2
/ IORQ
DD7
DD4.4 DD6.2
14 R 0
5 At 11 ° WR January 1910 1 8 4 '6
5 / +1 2 6 9 5
3
DD6.3 DD3.2
D13: October 26 'Aug. 13 ° R _
D49: 11 September 1912 D Q ° 8
11 / C
D13: Oct. 28 ° S
D50: 13
+5 B
HLD signal is taken from the leg 28y VG93, / IP
- With VG93: 35, / IORQ - with Z80: 20, and / bit7 # FF
- See below.
For the turbo:
1. Disable D5: 2, D13: 1928 (D5: 13);
2. Disable D15: 1 of +5 V,
apply for D15: 1 signal / RFSH (D13: 28);
3. Disconnect the D13: 6 from D1: 8 so that
remained between D13: 6, and resistors
rum, connecting it to +5 V.
By the way, AY-3-8910 (not YAMAHA!) Also
does not operate in the turbo, as VG93, so that
This revision will solve the problem of brake
AY.
To repeat: for normal turbo
We need to change the diode VD2 in the scheme of the controller.
If it does not replace most turboloaderov the turbo will fail,
since access routines use DOS
jp # 3d30. Turbo this very strongly VD2
inhibits switching pages ROM (DOS / BASIC). As a result - all
the familiar effects: running hangs and / or crap on the disc
...
That scheme is replacing the diode VD2 (at the Pentagon
diagram of the controller):
As there are:
DD77 (LL1) DD76 (TM2)
VD2
January 11 <13
C3
R13
DD78 (AG3)
12
And how it should be:
DD77 (LL1) LI1 DD76 (TM2)
11 January 1913 'November 1913
12
C3
DD78 (AG3)
Free element LI1 is a scheme to
12 turbo processing.
But here, in fact, the scheme itself Revised Controller
BETA-DISK-TURBO in BETA-DISK-TURBO-HD:)
BQ1: 16MHz DD9
DD86: June 2 A0
DD8.1 DD8.2 DD8.3 DD93: May 14 A1 Y0 4> on the DD76: 3
January 1 ° ° 2 3 1 4 5 1 ° 6 March B0 Y1 7> instead of 2MHz
DD93: June 13 B1 on completion
K43 K43 TURBO-SH
1 S
15 ° OE
DD5.2
+5 V
13 ° RQ 9 in mikrik HD / DD in
D7 (Z80: 13) 12 D _ drive (see below)
D88: 11 September / C Q ° 8 / bit7 # FF
10 ° S
Products:
DD1: 1533KP11, DD2: 1533LE1, DD3: 1533TM2, DD4: 1533LL1,
DD5: 1533TM2, DD6: 1533LI1, DD7: 1533IE7, DD8: 1533L 1
DD9: 1533 (555) KP11
Any chip, except DD8 (A 1) and DD9
(KP11) can be replaced by a similar
555, it will be reflected only on
load on the PSU.
Old signals coming in DD76: 3, 2MHz
on the TURBO-SH - CUT!
The signal from the DD5: Revised September, going to mikrik
HD / DD disk in the drive can not buffer (do not buffer it, and
train on the drive I-1m, and everything is OK). Sam mikrik HD /
DD is located on board the motor just above the hole "HD" in
the disc (its More typically glued). On one leg mikrika is
usually the common wire, while the other removed control signal
for the chip. Here is the second leg and give a signal "HD /
DD". Yes, now you need to drive away stickers (on 3.5 "-
stickers! insanity ..). If you're going to use 720 k 3.5"
drives (which are holes "HD" does not), pre- miss signal "HD /
DD" through the resistor 50 .. 100 Ohm, and only then to serve
it mikrik in the drive.
In fact, the Pentagon this generator, 16MHz would not be
needed, but because almost all pentagonschikov PLL stands for
556RT4, then the scheme is given with regard to its presence in
controller. If the PLL does not, DD9: 2
must be submitted DD76: 6, DD9: 3 - DD86: 6
and then cut to DD76: 6 of DD92: 3.
How it all works together?
Mode density (normal / high) switch software, bit7 port # FF
controller:
bit7 = 0 - normal,
bit7 = 1 - high density.
Fortunately, it so happened that all the programs that run
with the disc, keep this bit always in the same state: at the
origin. Making the revision, you can safely run
old prog, they also, as before will
work with disks of 360K, 720 k.
I must say, without a turbo is not working
as exchange rate rises exactly in the
twice (at the VG93 is served instead of 2MHz
1MHz), now it is more 60K/sek.
Including turbo-mode when running the program from the ROM DOS,
to the point that a Z80 is still about 112 cycles
the cycle of exchange and he, Z80, works with VG93
as well as on a normal density.
At the high-density disk climbs up
512bayt the 18-sectors (size 1.44M) or to
Reached the 10 1024-byte (non-standard, but also
format, 1.6Mb). Thus, easily read / write HD-drives MSDOS (PS /
2).
Revised turbo it will always be
included in the disk operations, but only after the drive has
time to unwind. If the exchange with the disc goes on the usual
density, the turbo mode can be disabled mikrikom "TURBO /
NORMAL" (interesting that this needed for a single bend:
FUT by MI'DI). If the turbo was included,
It is deactivated at the time of promotion drive
and then on again.
When positioning for revision TURBO
-SH is always going 2MHz, unfortunately, more
high frequency VGshka does not work.
It is rumored that on some of the two reserve
pin-drive 5.25 "should
go signal to speed control
engine. On my Mitsumi 3.5 "both will not go back. So, I gave
the signal "HD / DD" through the 2nd backup pin (numbered as 4
th to diskovodnom connector) - - And I have works great, and PC.
P.S. All elements of the notation given for the
Pentagon scheme in which address signals Z80 marked A1-A16.
Unfortunately, without removal of the casing drive can not do,
but all the alterations in it - one posting.
P.P.S. A new scheme of turbo-mode has been provided to me by
Roman Milyukovs, for which many thanks to him!
