Tandy 1000 SL Technical Reference Manual page 66

A d d r e s s D e s c r i p t i o n
FFE9
Programmable W a i t State P o r t
B i t ( s 1 D e s c r i p t i o n
0
I n t e r n a l
M e m o r y
W a i t States
0 = 0
w a i t s t a t e s
1 = 1
w a i t
s t a t e s
F F E A
1 , 2
E x t e r n a l
M e m o r y
W a i t States
00 = 0 w a i t s t a t e s
0 1 = 1
w a i t
s t a t e s
1 0 = 2
w a i t
s t a t e s
1 1 = 3
w a i t s t a t e s
3 , 4
I/o C y c l e W a i t States
0 0 = 0
w a i t
s t a t e s
0 1 = 1
w a i t
states
1 0 = 2
w a i t s t a t e s
1 1 = 3
wait s t a t e s
5
DMA E a r l y
W r i t e
D i s a b l e
0 =
DMA w a i t s
f o r
IOCHRDY
= 1
t o s t a r t W r i t e
Strobe
1 = N o r m a l 8 2 3 7 A - 5 W r i t e Strobe
G e n e r a t i o n
WRITE/READ
I n t e r n a l
V i d e o
W a i t S t a t e s
0 = 0
w a i t
s t a t e s
1 = 1
w a i t
states
O S C I N
Select
0 =
2 8 . 6 3 6 3 6 MHz
1 =
2 4 MHz
B i t 0: ROM P A G I N G 0
B i t
1 :
ROM P A G I N G
1
B i t
2:
ROM P A G I N G
2
B i t
3:
ROM P A G I N G
3
B i t
4:
ROM P A G I N G
4
B i t
5 : 0 =
I n t e r n a l a n d
B u s R e f r e s h
B i t D e s c r i p t i o n
6-7
B i t
7
B i t
6
1 = I n t e r n a l
R e f r e s h
o n l y
0 0 Two
B a n k s
of
1 2 8 K m e m o r y
0 1
Four
B a n k s
of
1 2 8 K m e m o r y
1 0
O n e B a n k
of
5 1 2 K m e m o r y
1 1
O n e B a n k
of
5 1 2 K
memory,
O n e
B a n k
of
1 2 8 K m e m o r y
55