Toshiba T1200 - 1.2 System PCB

1.2 SYSTEM PCB
System PCB is composed of the following devices:
o Central processor: CPU (80C86-2) (9.54 MHz/4.77 MHz)
o Numeric data processor: NPU (8087, optional)
o Memory
System memory
Expanded memory
BIOS ROM
Video RAM
640 kbytes
384 kbytes
32 kbytes
16 kbytes
o System support elements
Direct memory access: DMA (82C37)
Timer : (82C53)
Programmable interrupt controller: PIC (82C59)
o Floppy disk controller: FDC (8565)
o Keyboard controller: KBC (80C49)
o Acynchronous communication element: ACE (8570)
o Gate array
Bus driver
Bus controller
EXP-MEM controller
Display controller
1-3