Apple-1-HW
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apple1serial
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scripts mentioned in README.md

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flowenol 2023-01-09 11:15:16 +01:00
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README.md
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@ -12,8 +12,9 @@ as half-duplex UART. The signal levels are TTL, so adapter boards may be require
to connect the device to a regular modern PC is to use FTDI FT232RL USB dongle.
The board tries to mimic the original ACI behaviour via the modified ACI loader program `$C100` located on the on-board ROM.
The usual way to communicate with the device is to hook it up to a PC and use a terminal emulator program to send and receive binary
files representing the Apple-1 memory contents.
The usual way to communicate with the device is to hook it up to a PC and use a terminal emulator program to send and
receive binary files representing the Apple-1 memory contents. An alternative is to use custom software/scripts like the
`scripts/transfer.py` python script.
In order to learn how to use the loader program, please refer to the original ACI documentation or the instructions provided [here](https://www.sbprojects.net/projects/apple1/aci.php).
@ -54,6 +55,7 @@ The contents of this repository are as following:
* firmware/ - contains source code for the ATMega328 MCU firmware
* mapping/ - contains EQN and JED files for GAL20V8 based address decoder for the board
* src/ - contains the 6502 assembly sources for the A1SI onboard ROM routines
* scripts/ - contains python based file transfer utility
## Requirements
@ -93,7 +95,7 @@ https://github.com/flowenol/Apple1ExpanderPcb
## PCB
Gerber files can be found in the `gerber/` directory.\
Gerber files can be found in the `gerber/` directory.
The KiCad project files with board design and schematics can be found here:
http://github.com/flowenol/Apple1SerialPcb
@ -110,7 +112,7 @@ http://github.com/flowenol/Apple1SerialPcb
| R3..R9 | 1K 0.5W | 7 |
| XTAL1 | 16Mhz crystal HC49 low profile | 1 |
| ATmega328P1 | ATMega328P microcontroller DIP28 | 1 |
| 7402 | 7402 quad 2 input NOR gates DIP14 | 1 |
| 7402 | 7402 quad 2 input NOR gates DIP14 | 1 |
| 74S257mux1,2 | 74S257 quad multiplexers DIP16 | 2 |
| 8T97buf1,2 | 8T97N hex tristate buffers DIP16 | 2 |
| 20V8B1 | GAL20V8 SPLD (35ns or less) DIP24 | 1 |