Original PC Hardware Reference

More documents

Recommendations

Info

CD: 44 Original PC Hardware Reference (continued) System Architecture Interrupt levels 16 (11 usable) Type Edge-triggered Shareable No DMA channels 8 (7 usable) Bus masters supported Yes Upgradable processor complex No ROM BIOS sockets 8/16-bit ISA bus slots Variable capacitor clock trimmer 128K Memory modules Display switch Battery connector Speaker connector Figure 11 The IBM AT Type 1 motherboard. Keyboard connector Math coprocessor connector Keylock connector CMOS RAM/RTC 8042 keyboard controller 8259 interrupt controllers 286 processor Clock crystal 8237 DMA controllers
Memory An Introduction to the AT CD: 45 Standard on system board 512KB Maximum on system board 512KB Maximum total memory 16MB Memory speed (ns) and type 150ns Dynamic RAM chips System board memory-socket type 16-pin DIP Number of memory-module sockets 18 or 36 (2 or 4 banks of 18) Memory used on system board 36 128KB ×1-bit DRAM chips in 2 banks of 18, or 18 256KB ×1-bit chips in one bank Memory cache controller Wait states: No System board 1 Adapter 1 Standard Features ROM size 64KB ROM shadowing No Optional math coprocessor 80287 Coprocessor speed 4 or 5.33MHz Standard graphics None standard RS232C serial ports 1 (some models) UART chip used NS16450 Maximum speed (bits per second) 9,600bps Maximum number of ports supported 2 Pointing device (mouse) ports None standard Parallel printer ports 1 (some models) Bidirectional Yes Maximum number of ports supported 3 CMOS real-time clock (RTC) Yes CMOS RAM 64 bytes Battery life 5 years Disk Storage Internal disk and tape drive bays 1 full-height and 2 half-height Number of 3 1/2-inch and 5 1/4-inch bays 0/3 Standard floppy drives Optional floppy drives: 1×1.2MB 5 1/4-inch 360KB Optional 5 1/4-inch 1.2MB Standard 3 1/2-inch 720KB Optional 3 1/2-inch 1.44MB Optional (8MHz models) 3 1/2-inch 2.88MB No (continues)
Page 1 and 2: This is the Current C-Head at the B
Page 3 and 4: An Introduction to the PC (5150) CD
Page 5 and 6: Option adapters Figure 1 The IBM PC
Page 7 and 8: An Introduction to the PC (5150) CD
Page 9 and 10: Read-only memory { 64K to 256K read
Page 11 and 12: Expansion Slots Total adapter slots
Page 13 and 14: An Introduction to the PC Convertib
Page 15 and 16: ■ Serial/parallel adapter (#4015)
Page 17 and 18: An Introduction to the PC Convertib
Page 19 and 20: An Introduction to the XT (5160) CD
Page 25 and 26: Disk Storage An Introduction to the
Page 27 and 28: Switch Block 1 (PC and XT) Switch 5
Page 29 and 30: An Introduction to the Portable PC
Page 31 and 32: Disk Storage Internal disk and tape
Page 33 and 34: IBM also offered only three differe
Page 35 and 36: Power switch Power supply selector
Page 37 and 38: An Introduction to the AT CD: 37 Th
Page 39 and 40: An Introduction to the AT CD: 39 AT
Page 41 and 42: An Introduction to the AT CD: 41 Ty
Page 43: Table 10—Drive Types An Introduct
Page 47 and 48: Variable capacitor clock trimmer RO
Page 49 and 50: An Introduction to the XT Model 286
Page 51 and 52: ■ 1.2MB floppy drive ■ 20MB har
Page 53 and 54: Disk Storage An Introduction to the
Page 55: CMOS RAM/RTC 8259 Interrupt control

Original PC Hardware Reference

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?