Z-80
Z-80 is CPU Instruction Manual manufactured by Cromemco.
features
. Please read Section 2, OPERATING INSTRUCTIONS, before inserting the ZPU into your S100 system bus.
TECHNICAL SPECIFICATIONS
PROCESSOR: CLOCK RATE:
INSTRUCTION SET:
POWER-ON JUMP: POWER-ON JUMP LOCATIONS: WAIT STATE GENERATION:
Ml WAIT STATE: BUS PATIBILITY: POWER REQUIREMENTS: OPERATING ENVIRONMENT:
4 MHz version of the Z80
2 MHz or 4 MHz (switch selectable)
158 instructions including the 78 instructions of the 8080 processor
Jumper wire enabled
16 switch selectable locations
- 4 jumper selectable wait states Jumper wire selectable
S-100
+8 VDC @ 1.1 A
- 55 degrees Celsius
ZPU INSTRUCTION MANUAL
SECTION 2 OPERATING INSTRUCTIONS
The Cromemco ZPU is an S-100 bus patible CPU (Central Processing Unit) which uses the powerful Z-80A microprocessor. The Cromemco ZPU has an exclusive set of features designed to increase your total system puting power. Most importantly, the ZPU operates reliably at a 4 MHz clock rate--twice the speed of most other microputer systems. The ZPU offers Power-On Jump capability, an onboard wait state generator, optional independent selection of Ml wait states, address mirroring circuitry, and several other features discussed in this section.
2.1 POWER-ON JUMP
The ZPU Power-On Jump circuitry allows the board to be used in an S-100 bus system without front panel controls (e.g., Cromemco's Z-2, Z-2D and SYSTEM THREE). When system power is turned ON, the ZPU hardware forces an automatic jump to one-of-sixteen memory location selected with the four position Jump Address select switch.
The automatic jump address...
