Difference between revisions of "SIMPLE-Z80"
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* [https://www.ebay.com/itm/113735638336?hash=item1a7b2c1d40:g:93YAAOSwtk9go5uR&amdata=enc%3AAQAHAAAA0CjeSaZOW7IJt0NyR2yD7ilWLBLOhIXrKXUX00mtG4N2pCKiMj2ZmWvR2eYttWQWGhbYch81xsx3t3XDAFpKv1snVQMDOs%2BgIIUlq7KnkxRtImp%2BHKApjKwXS2CA%2FK5U0uOJ5AZnC%2BUxA4UEO8fhLc%2BucWWgY%2FysZU1Idm861p60B08tFLK25hEEO169mFVVKWJFdFm5xmP5bQVAd2GQVMEuFisq9hjkeoXJAbZsJG5hj45aIJ8Ftau0KsGfYAV9OxmNkOFFz5%2FG586nm0AMR4Q%3D%7Ctkp%3ABk9SR-CEoMHpYA Ebay listing] | * [https://www.ebay.com/itm/113735638336?hash=item1a7b2c1d40:g:93YAAOSwtk9go5uR&amdata=enc%3AAQAHAAAA0CjeSaZOW7IJt0NyR2yD7ilWLBLOhIXrKXUX00mtG4N2pCKiMj2ZmWvR2eYttWQWGhbYch81xsx3t3XDAFpKv1snVQMDOs%2BgIIUlq7KnkxRtImp%2BHKApjKwXS2CA%2FK5U0uOJ5AZnC%2BUxA4UEO8fhLc%2BucWWgY%2FysZU1Idm861p60B08tFLK25hEEO169mFVVKWJFdFm5xmP5bQVAd2GQVMEuFisq9hjkeoXJAbZsJG5hj45aIJ8Ftau0KsGfYAV9OxmNkOFFz5%2FG586nm0AMR4Q%3D%7Ctkp%3ABk9SR-CEoMHpYA Ebay listing] | ||
| − | ** Needs 68B50 | + | ** Needs 68B50 to run Grant's code |
[[file:SimpleZ80_Chipset.jpg]] | [[file:SimpleZ80_Chipset.jpg]] | ||
Revision as of 16:37, 17 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)
Chip Set
- Ebay listing
- Needs 68B50 to run Grant's code
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
| 27512 | 27256 | 27128 | 2764 | 28C64 | PIN | PIN | 2764 | 28C64 | 27128 | 27256 | 27512 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| A15 | VPP | VPP | VPP | N/C | 1 (J2) | 28 | VCC | VCC | VCC | VCC | VCC | |
| A12 | A12 | A12 | A12 | A12 | 2 | 27 (J5) | PGM | WE* | PGM | A14 | A14 | |
| A7 | A7 | A7 | A7 | A7 | 3 | 26 | A13 | N/C | A13 | A13 | A13 | |
| A6 | A6 | A6 | A6 | A6 | 4 | 25 | A8 | A8 | A8 | A8 | ||
| A5 | A5 | A5 | A5 | A5 | 5 | 24 | A9 | A9 | A9 | A9 | ||
| A4 | A4 | A4 | A4 | A4 | 6 | 23 | A11 | A11 | A11 | A11 | ||
| A3 | A3 | A3 | A3 | A3 | 7 | 22 | OE* | OE* | OE* | OE* | ||
| A2 | A2 | A2 | A2 | A2 | 8 | 21 | A10 | A10 | A10 | A10 | ||
| A1 | A1 | A1 | A1 | A1 | 9 | 20 | CE* | CE* | CE* | CE* | ||
| A0 | A0 | A0 | A0 | A0 | 10 | 19 | D7 | D7 | D7 | D7 | ||
| D0 | D0 | D0 | D0 | D0 | 11 | 18 | D6 | D6 | D6 | D6 | ||
| D1 | D1 | D1 | D1 | D1 | 12 | 17 | D5 | D5 | D5 | D5 | ||
| D2 | D2 | D2 | D2 | D2 | 13 | 16 | D4 | D4 | D4 | D4 | ||
| GND | GND | GND | GND | GND | 14 | 15 | D3 | D3 | D3 | D3 |
J3 - FTDI / TTL Serial
- GND
- RTS* (out)
- +5V
- Receive (in)
- Transmit (out)
- N/C
J4 - 5V Power
- 2x4 header
Software
Mechanicals
