2.6 KiB
A1Emu
Console based Apple 1 emulator for Windows
To build type
make
which outputs an exectable named A1Emu.exe
Next go to the working directory and copy a ROM for Integer Basic named "BASIC" (no extension) into that directory. The emulator will copy the first 4KB of that file's contents into address 0xE000.
The emulator runs in a normal console without any GUI, just like the original Apple 1 worked. You are greeted with a \ character. Type the following to start Apple 1 BASIC:
\
E000R
E000: 4C
>
The cursor should now be blinking after the > character. Type commands like
>PRINT "HELLO WORLD"
HELLO WORLD
>
If you want to load cassette storage into memory, you're going to need to uze Woz'z ACI. To do that, run from Woz's monitor (not BASIC)
C100R
to start the cassette interface. Now suppose we wanted to store the contents of memory from address 0xE000 to 0xEFFF. To do that, you would type afterwards
E000.EFFFW
Hit enter after typing the command. Now, within 10 seconds type the | (pipe) character to pause the emulator. The emulator will display the last reads and writes into memory of the previous opcode. Now type
tstart write
resume
which starts the emulated cassette. After waiting a few seconds, you will be greeted with a \ prompt again, meaning you have returned to the monitor. Type | once again, but this time, type the following 2 commands
tstop
tstore SOME_FILE
resume
This stores in the same directory as the executable a file named SOME_FILE which can be read from using the cassette interface.
Suppose we wanted to read that file into the same memory addresses we had stored it from. First, we would enter the ACI again using
C100R
and then type
E000.EFFFR
but DON'T PRESS ENTER. We need to start the cassette tape playing back again before we finish giving this command to the ACI. Type | to pause the emulator. Then run
tload SOME_FILE
tstart read
resume
After entering the resume command, press enter one more time to finish telling the ACI to read to 0xE000. After a few seconds, you should be greeted by \. At this point, press | to pause emulation and type
tstop
resume
The contents of addresses 0xE000 to 0xEFFF should now be the same as the contents originally stored onto the file using the ACI.
It functions exactly like the original Apple 1. To learn how to use Apple 1 basic, go here: https://archive.org/details/apple1_basic_manual/page/n11
Here is a good place to learn more about the Apple 1 computer: https://www.sbprojects.net/projects/apple1/