Original PC Hardware Reference

More documents

Recommendations

Info

CD: 10 Original PC Hardware Reference (continued) Memory Standard on system board 16KB, 64KB, or 256KB Maximum on system board 256KB Maximum total memory 640KB Memory speed (ns) and type 200ns Dynamic RAM chips System board memory-socket type 16-pin DIP Number of memory-module sockets 27 (3 banks of 9 chips) Memory used on system board 27 16KB×1-bit or 64KB×1-bit DRAM chips in 3 banks of 9, one soldered bank of 9 16KB×1-bit or 64KB×1-bit chips Memory cache controller Wait states: No System board 1 Adapter 1 Standard Features ROM size 40KB ROM shadowing No Optional math coprocessor 8087 Coprocessor speed 4.77MHz Standard graphics None standard RS232C serial ports None standard UART chip used NS8250B Maximum speed (bits per second) 9,600bps Maximum number of ports 2 supported Pointing device (mouse) ports None standard Parallel printer ports None standard Bidirectional No Maximum number of ports 3 supported CMOS real-time clock (RTC) No CMOS RAM None Disk Storage Internal disk and tape drive bays 2 full-height Number of 3 1/2-inch and 5 1/4-inch bays 0/2 Standard floppy drives Optional floppy drives: 1×360KB 5 1/4-inch 360K Optional 5 1/4-inch 1.2M No 3 1/2-inch 720K Optional 3 1/2-inch 1.44M No 3 1/2-inch 2.88M No Hard disk controller included None
Expansion Slots Total adapter slots 5 Number of long/short slots 5/0 Number of 8-/16-/32-bit slots 5/0/0 Available slots (with video) 3 Keyboard Specifications 101-key enhanced keyboard No, 83-key Fast keyboard speed setting No Keyboard cable length 6 feet Physical Specifications Footprint type Dimensions: Desktop Height 5.5 inches Width 19.5 inches Depth 16.0 inches Weight 25 pounds Environmental Specifications Power-supply output 63.5 watts Worldwide (110/60,220/50) No Auto-sensing/switching Maximum current: No 104-127 VAC Operating range: 2.5 amps Temperature 60–90 degrees F Relative humidity 8–80 percent Maximum operating altitude 7,000 feet Heat (BTUs/hour) 505 Noise (Average db, operating, 1m) 43 FCC classification Class B An Introduction to the PC (5150) CD: 11 Tables 3 and 4 show the switch settings for the PC (and XT) motherboard. The PC has two eightposition switch blocks (Switch Block 1 and Switch Block 2), whereas the XT has only a single Switch Block 1. The PC used the additional switch block to control the amount of memory the system would recognize, and the XT automatically counted up the memory amount.
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: Read-only memory { 64K to 256K read
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 and 44: Table 10—Drive Types An Introduct
Page 45 and 46: Memory An Introduction to the AT CD
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

Create successful ePaper yourself

Delete template?

Save as template?