Pentagon - hidden reserves.
Reset to "Gluk Reset Service"
(C) 2004 Demon / Diman Plus Company
Damn! Mom told me: "save often, son." And I did not listen,
and here again full article dial. Hence the lyrics will not get
down to business.
The Pentagon can not get into the quarter-zero ROM, which is
not good. Once at the site zxnet. pp.ru I came across an article
with a scheme to do this (see below, section with cuts and
changes).
============ Cut ==============
(C) 2003 U # 74
As the scheme Pentagon initially
DD82 DD94 DD83
A0 1 '3 1 1 o 2 4 1 6> / INEN
A1 2 5 on ID4
LN2 DD83 DD89 B.14
LI1 LL1 DD89 B.15
/ IORQ 1 1 3
2
DD78 LL1
o-12
AG3
R13 / IORQ
470
DD77 DD76
VD2
January 11 ~ September 13
+5 V on May 12 June 1> / OIRQ
C3 1 o8 4
LL1 10o TM2
LL1
DD82
* C39-4 '6
DD77-5
B.8 C20 *
LI1 / DOSEN DD36 B.1
DD83 DD84 DD83
DD77
12 1 11 5 1 o-6 Sept. 1 Aug.> ROM2
A14-1 January 13 March 1910 DD36 v.27
A15-2 LN1 27c512
* C36 LL1 LL1
LL1
Scheme 1
Note:
* C36 = bit4 port # 7FFD
* C39 = / RESET
* C20 may not be installed
Actually, and scheme
Excerpt from (c) 1998-1999 AXLR "Refinement of the controller
to work with the HD-disc":
as it should be
DD82 DD94 DD83
A0 1 '3 1 1 o 2 4 1 6> / INEN
A1 2 5 on ID4
LN2 DD83 DD89 B.14
LI1 LL1 DD89 B.15
/ IORQ 1 1 3
2
DD78 LL1
o-12
AG3
/ IORQ
about
C39
DD77 'DD76
'* O
January 11 o * 13 September
+5 V on May 12 June 1> / OIRQ
C3 1 o8 4
LL1 10o TM2
LL1
DD82
C39-4 '6
DD77-5
B.8 C20 o
LI1 / DOSEN DD36 B.1
DD83 x DD84 DD83
DD77
12 1 11 5 1 o-6 Sept. 1 Aug.> ROM2
A14-1 January 13 March 1910 DD36 v.27
A15-2 LN1 27c512
C36 LL1 LL1
LL1
Scheme 2
Legend:
o - append
x - cut
* - Additional elements (2 elements LI1)
The signal from the DD76 pin. 9 (TM2) is applied to pin DD36.
1 (27c512), the old signal from DD36 vyv.1 disconnect.
If necessary, change the DD76 (TM2) on a faster, series 1533.
============ Cut ==============
Of course, I was delighted, made the necessary changes, has
launched PC saw a familiar Gluk Reset Service, was to dance,
sing, jump. But later became disillusioned, the fact that Gluck
is Basic option 128, selecting it, I'm surprised to hit the
Basic 48. It turns out that for what would swap the service and
beysik128, so ... . It's like a flash in place Basic128. And
besides, now you can not get any Basic128, no Service firmware
only Basic48.
No, because things are not done, I said to myself, and began
to think about scheme.
After two cigarettes and ten minutes of meditation came to
this option:
DD82 DD94 DD83
A0 1 '3 1 1 o 2 4 1 6> / INEN
A1 2 5 on ID4
LN2 DD83 DD89 B.14
LI1 LL1 DD89 B.15
/ IORQ 1 1 3
2
DD78 LL1
o-12
AG3
/ IORQ
about
C39
DD77 'DD76
'* O
January 11 o * 13 September
+5 V on May 12 June 1> / OIRQ
C3 1 o8 4
LL1 10o TM2
LL1
DD82
C39-4 '6
DD77-5
B.8 C20 o
LI1 / DOSEN DD36 B.1
DD83 x DD84 DD83
DD77
12 1 11 5 1 o-6 x 9 1 August> ROM2
A14-1 1 3 13 o 10 DD36 v.27
A15-2 LN1 27c512
C36 LL1 LL1
LL1
^
here
Scheme 3
Unlike the scheme 3:
Little differences to the disgrace.
Cut the wire from pin DD84. 6 to DD83 pin. 9, and connect the
legs 9 and 10 DD83 among themselves.
How it all works.
When applying for a signal / RESET on the element LI1 (marked
*) to pin 9 IC DD76 (TM2) produced a log. 0, while
as a signal of C36 also still has the log. 0, zero-turn
quarter-ROM. Further, the program when switching pages are
sending the value to the port # 7FFD with mask # 10, as a
result of C36 and all the tiptop.
The scheme is already 2 months and everything is fine, even
works NeOS (What I need it), but sometimes when you reset
sometimes hit it once in Basic128, to eliminate this effect is
necessary, as mentioned above replaced by DD76 series 1533, but
I'm lazy, and for mikruhoy market should shove.
