Difference between revisions of "SIMPLE-Z80"
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| Line 46: | Line 46: | ||
{| class="wikitable" | {| class="wikitable" | ||
! PART | ! PART | ||
| − | ! | + | ! PIN 1 |
| − | ! | + | ! PIN 27 |
|- | |- | ||
| 27128 EPROM | | 27128 EPROM | ||
| Line 61: | Line 61: | ||
| A14 (GND) | | A14 (GND) | ||
|- | |- | ||
| − | | SST27SF256 | + | | AT28C64 EEPROM |
| + | | N/C | ||
| + | | WE (5V) | ||
| + | |- | ||
| + | | SST27SF256 FLASH | ||
| VPP (5V) | | VPP (5V) | ||
| A14 (GND) | | A14 (GND) | ||
|- | |- | ||
| − | | SST27SF512 | + | | SST27SF512 FLASH |
| A15 (GND) | | A15 (GND) | ||
| A14 (GND) | | A14 (GND) | ||
Revision as of 10:34, 13 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
- DB-9 Male
- Pinout
- 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 | PIN 1 | PIN 27 |
|---|---|---|
| 27128 EPROM | VPP (5V) | PGM (5V) |
| 27C256 EPROM | VPP (5V) | A14 (GND) |
| 27C512 EPROM | A15 (GND) | A14 (GND) |
| AT28C64 EEPROM | N/C | WE (5V) |
| SST27SF256 FLASH | VPP (5V) | A14 (GND) |
| SST27SF512 FLASH | A15 (GND) | A14 (GND) |
J3 - FTDI / TTL Serial
- GND
- RTS* (out)
- +5V
- Receive (in)
- Transmit (out)
- N/C
J4 - 5V Power
- 2x4 header
Mechanicals
