Difference between revisions of "SIMPLE-Z80"
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# N/C | # N/C | ||
# N/C | # N/C | ||
| + | |||
| + | === J2/J5 - EPROM/EEPROM Select Jumpers === | ||
| + | |||
| + | {| class="wikitable" | ||
| + | ! PART | ||
| + | ! J2 PIN 1 | ||
| + | ! J5 PIN 27 | ||
| + | |- | ||
| + | | 27128 EPROM | ||
| + | | VPP (5V) | ||
| + | | PGM (5V) | ||
| + | |- | ||
| + | | 27C256 EPROM | ||
| + | | VPP (5V) | ||
| + | | A14 (GND) | ||
| + | |- | ||
| + | | 27C512 EPROM | ||
| + | | A15 (GND) | ||
| + | | A14 (GND) | ||
| + | |- | ||
| + | | SST27SF256 EEPROM | ||
| + | | VPP (5V) | ||
| + | | A14 (GND) | ||
| + | |- | ||
| + | | SST27SF512 EEPROM | ||
| + | | A15 (GND) | ||
| + | | A14 (GND) | ||
| + | |- | ||
| + | |} | ||
=== J3 - FTDI / TTL Serial === | === J3 - FTDI / TTL Serial === | ||
Revision as of 17:31, 12 September 2022
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Contents
Features
- Build of Grant Searles's Simple Z80 CPU
- Runs BASIC
- Z80 CPU
- 7.3728 MHz clock
- 56KB SRAM (uses 128KB parts)
- 8KB EPROM/EEPROM
- 68B50 Serial Port (ACIA)
- RS-232 port
- Header for FTDI
- 115,200 baud
- Reset switch with optional Power Supervisor
- 95x95mm card
- (4) 6-32 mounting holes
Memory Map
- 0x0000-0x1FFF 8KB ROM
- 0x2000-0xFFFF 56KB SRAM
- I/O
- 0x00-0x7F - Free
- 0x80-0x81 - Serial port (ACIA)
Headers
Connectors
J1 - RS-232 Serial
- N/C
- Receive
- Transmit
- Loop to pin 6
- GND
- Loop to pin 4
- RTS
- N/C
- N/C
J2/J5 - EPROM/EEPROM Select Jumpers
| PART | J2 PIN 1 | J5 PIN 27 |
|---|---|---|
| 27128 EPROM | VPP (5V) | PGM (5V) |
| 27C256 EPROM | VPP (5V) | A14 (GND) |
| 27C512 EPROM | A15 (GND) | A14 (GND) |
| SST27SF256 EEPROM | VPP (5V) | A14 (GND) |
| SST27SF512 EEPROM | A15 (GND) | A14 (GND) |
J3 - FTDI / TTL Serial
- GND
- RTS* (out)
- +5V
- Receive (in)
- Transmit (out)
- N/C
J4 - 5V Power
- 2x4 header
Mechanicals
