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9·6. LZ95H12
(GatearraYF~
"
:
~-'
•••
J
The 'l.is5H12irla{
b~ tl~~CI
tdgether .:vilha LZ93J2i.
a
\/40
and
optionally. a8087." ' , , ' .
,~.
,.,.,.",
cc.
..
.
TheLZ95H12
iricoiporat~. th~I~lio;'iiigi~hcti6ns~
.'"
1. V40/system address bus interfacing;
2;' V40/sysrefifdafa bUS·lnterfacing;':· .
3. V40 osciiJator selection;
4. blig cycle, g"R.ralerartdIO)chahneiinterface:"
5. 8087 interfacE>;
6. system ROM interface;
7. DRAM control signal generation;
8. system timer clock generation;
9. speaker control;
, , ' J
.
10. keyboard interface;
11. configurancn-$witch:port~··:
12. NMI cOntrol and
10
trapping;
13. SCM inierface; and
14. intermil,i-.'/Iq -~egister interface.
LZ95H12 B,lock
Diagralll
,.-
..
_---
.. ----
.....
-._-_._------
.....
)
cPOsco
CPQSCI
oseo
05C,
~
crock
~
generator
~
Timer control
RESET
CPUCLK
A8~A19
Latch
_
4'
L:
';::==~
8S0~BS2
AEN
TC
READY
SLOeVe
EXm'
eXTru
REFRa
RDYV40
SMAb
SMWR
SIORb
SIOWR
SYSCLK
ALE
STe
EXPOIA
ExpBeN~1;::==~,
IN/OUT bull
DRAM
controller
:8
:20
:,
SCMHS
CPUHS
IPCO~IPC3.;..,..~L~~J~tl::[=::===~=
"
va,c
TCLK
SDO~SD7
SAO~SA19
PASO-PAST
CASO~CAS4
0E0~0Ef
wEiFWEf
~
ROMeE
FiOMW
HLDAQ
HLDAK
AQ/Glo
ADY87
INT87
"iOCRR"
NMI
KCLK
KDATA
IRQ1
TOUT2
TCTL2
SPEAKER
-62-
LZ95H12
,
..
,
:',.
: .
,'.'.'
} , ' ,
,
-._,.
"
'.',',
.
,;
No,
~Ignal.name,
jlO
: )
, ;
,pe~cJiptlqn,
CI
..
f
, ,W51
A.
. Not used
h';;
.
.......
2'
'OEO
,
a
· bRAMoutpiJt enanl" , ;.
'.'
; "
:i
'OEI
d
· ,Not used
. 4
R!=SET
I ' .. $ystem reset . . sign?] iryut· .
,
)i:.5:·
.l'iQfi;fCE ,
a
ROM chip enable :,iJ
,i,'J
6
ROMOE
0
ROM output "nable ,
~L:
,
"
,
7
BSO
I
Bus status 0
I
- 'J ',."' .
8
BSI
I
Bus status 1
"
:
..
:.
'.'
~. ~-
9
BS2
I
Bus status 2 '.,.
..
-"
-----.-
.,
·J!'i~
,
10
ADO
1/0
ADbgH.
...
) '
:
. .
'.
11
ADI
1/0
AD busl
,
.
.
,
) ·12, ·,.,·I\D2, '. ,1/0· AD bus 2
,
;
..
"
'.'1,,·
-"".-
1.3
AD3 .
.110 .ADbuS3
,
-" ..
'"
~;
."
.,
.
.
.'"
, 14) "I\D41
-:
.'
1/0
AD'bus 4'
'
.
"
!
,r.---
15
.' AD5'
1/0 'AD,bus 5
"
16
Vcc
"
. 17
.GNq .
,.
) 18
..
Ab6
1/0
iilibus
6
,
,.
19
AD7
110 ,:AD bus'?
.
20
,
AS
I
. CPU addreSS 8
21
A9
I
CPU address 9
...
22
Al0
I
CPU address 10' •
,
23
1\11
r
CPU address 11
24
"ri'
Alg,
. ,!
· C!,:Uaddiess
i
2
••
25
A13
I
CPUaddre.ss
,1~
,.
"
, ..
).
'
..
26
A14
I
CPU address 14·
:
."
;.
27
'"
A15
J
CPU address 1,5'
"28
A16
,r
CPU 'address j 6
,
29
,
A17
f
CPU' aadress 1,7
30
A18
I
CPU address
Hi
"
. .31
.',,". ,.AI9 .
I,
CPU addiess 19 .
..
32
ROya7.,
b,
;: Ready ~igrial lor 8081
33
RDYv40
a
Ready signal lor V40 . ".
,34
RE,FR~
I,
Ref~esh
request
,35 : R9IGTO.
110 ':
R~quesJ!Gfant
0,
.
,
36
.IRQ87
I
,Interrupt requesUrom 8087
,
37
HlDAK
I
Bus hold acknowledge
,
38
HlDRQ
a
Bus hold (equest
,
"
, ) '
:
1'~9
,TCLK
0
" Tirii'eh;lock
'
. .
,
'40
TCTL2
a
',~~'rT:1er
2'
control,
.
,
41
,TQIJT2
. 1
Timer2qutput
.
42
IRQl
a
Interrupt 1
43
NMI
a
Non·maskableinterrupt "
..
',:
..
,
..
,
,""
.
44- ' . . '.' l'C
I .. Terminal count -;'
"
,
.'
.
,
"45
CPUClK
I
CPU Ciock
.
.
,
"
....
,
'46
'.
)(1' .
0
yonnectedwHh Xl phi,oIV40
..
,
-: .
'
..
47
CPOSCO
a
Connected with'20MHz crystal
48
CPOSCI
I
:49
'C3N[l
. ,.
' .
....
,
,50'
' Vcd-'-':'
,
.
'
..
,,:,
;
",'
..
,
"
.'.,1,\ ,
I
51
VOSC
a
Clock output/or lZ93J21' '
..
'.
'
52
OSCO
a
Connected with 14.31818MHz crystal
53
ascI
I
54
AEN
I
DMA or refresh active signal
55
EXTM
1/0
External memory active signal
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