Clock Generator receives 14.31818 MHz (X2) and generates the following frequen-
cies:
• 20 MHz for the CPU (CPU operates at 40MHz.)
• 14.7456 MHz for the COM
• 24 MHz for the FDC and VFO
• 16 MHz is used for GA
• 14.31818 MHz is used for T9901 (SI)
Gate Array
System Controller Gate Array
This gate array has the following functions:
•
CPU Controller
•
Memory Controller
-
DRAM Controller
-
Compatible Bus Interface Controller
•
SMI Controller
•
VL Bus Controller
•
Bus Controller
-
Compatible Bus Interface Controller
-
Compatible Access Controller
-
DMAC Controller
-
I/O Controller
•
Address Latch Controller
-
32-Bit to 16-Bit Controller
-
Address Latch
-
DMA Address Generator
-
Refresh Address Generator
•
I/O Register
-
Compatible I/O Port
-
Saving the data of the Register (in resume) Controller
-
Toshiba Special Register
•
40 MHz/20 MHz Controller
•
Data Bus Change Controller
•
Data Latch
PCMCIA Controller Gate Array
This gate array has the following functions:
•
Memory Card Controller
-
PCMCIA IC Card Controller
-
Toshiba Modem Card Controller
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