Tandy 1000 HX Technical Reference Manual page 294

• TANDY COMPUTER PRODUCTS •
DESCRIPTION OF EACH PIN FUNCTION
25
PIN#
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
PIN NAME
vss
X M D [ 2 ]
X M D [ 3 ]
X M D [ 4 ]
X M D [ 5 ]
XMD [ 6 ]
X M D [ 7 ]
YMD[0]
YMD[1]
YMD[2]
YMD[3]
YMD[4]
YMD[5]
YMD[6]
YMD[7]
RFSHB
MWE1B
MWEOB
RASB
CASB
BMEMRB
VDD
BMEMWB
CK28M
VIDEOWAIT
SYSRSTB
IOMB
A
B
C
IOMEMSELB
NMIEN
BIORB
BIOWB
LPIN
LPSWB
OUTVSYNC
OUTHSYNC
COMPCOLOR
COMPSYNC
OUT I
OUTR
VSS1
OUTB
TYPE
Ground
Input/Output
Input/Output
Input/Output
Input/Output
Input/Output
Input/Output
Input/Output
Input/Output
Input/Output
Input/Output
Input/Output
Input/Output
Input/Output
Input/Output
Input
Output
Output
Output
Output
Input
Power
Input
Clock
DESCRIPTION
Ground
External Memory Data I/O Bank 0
External Memory Data I/O Bank 0
External Memory Data I/O Bank 0
External Memory Data I/O Bank 0
External Memory Data I/O Bank 0
External Memory Data I/O Bank 0
External Memory Data I/O Bank 1
External Memory Data I/O Bank 1
External Memory Data I/O Bank 1
External Memory Data I/O Bank 1
External Memory Data I/O Bank 1
External Memory Data I/O Bank 1
External Memory Data I/O Bank 1
External Memory Data I/O Bank 1
Memory Refresh Strobe Input
Ram Bank 1 Write Enable Signal
Ram Bank 0 Write Enable Signal
Ram Row Address Strobe
Ram Column Address Strobe
CPU Memory Read Strobe
5 Volts Supply
CPU Memory Write Strobe
28.63636 Mhz Clock Input
Output(OpenDrain) Video Wait Signal
Input
Input
Output
Output
Output
Output
Output
Input
Input
Input
Input
Output
Output
Output
Output
Output
Output
Ground
Output
System Reset
CPU I/O-Memory Signal (Memory - > 1 ,
I/O -> 0)
Encoded Peripheral Select Line
Encoded Peripheral Select Line
Encoded Peripheral Select Line
External Buffer Enable
Nonmaskable Interrupt Enable
CPU I/O Read Strobe
CPU I/O Write Strobe
Not Used
Not Used
Vertical Sync Output
Horizontal Sync Output
Composite Color Signal
Composite Sync Signal
Intensity Out
Red Video Out
Ground
Blue Video Out/Monochrome Dotclock