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Clarify how to load ROMs in README files

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This commit is contained in:
Seth Morabito 2023-07-23 10:12:16 -07:00
parent 4a8a803472
commit 5a25750f46
3 changed files with 13 additions and 12 deletions
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1
.gitignore vendored
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@ -1,4 +1,5 @@
*~
*.jar
*#
target
.DS_Store

7
README.md
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@ -227,10 +227,9 @@ properly. Without a ROM in memory, the simulator will not be able to
reset, since the reset vector for the 6502 is located in the ROM
address space.
By default, any file named `rom.bin` that exists in the same directory
where Symon is launched will be loaded as a ROM image. ROM images can
also be swapped out at run-time with the "Load ROM Image..." in the
File menu.
ROM images can be loaded with the `-rom` argument when running
Symon from the command line. ROM images can also be swapped out at
run-time with the "Load ROM..." item in the File menu.
The "samples" directory contains a ROM image for the Symon
architecture named 'ehbasic.rom', containing Lee Davison's Enhanced

17
samples/README
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@ -11,7 +11,6 @@ Sample Programs
When loaded at address $0300, this program will echo back to the console
anything typed.
Both hello.prg and echo_poll.prg were assembled with the Ophis assembler:
https://hkn.eecs.berkeley.edu/~mcmartin/ophis/
@ -19,23 +18,25 @@ Both hello.prg and echo_poll.prg were assembled with the Ophis assembler:
3. echo_irq.rom
This is another echo program, and behaves identically to echo_poll.prg,
except it is interrupt-driven.
except it is interrupt-driven. This ROM can be loaded either through the
"File->Load ROM..." menu in Symon, or by specifying the path to
"echo_irq.rom" with the "-jar" command line option when running Symon,
for example: `java -jar symon-1.3.2.jar -rom samples/echo_irq.rom`
4. ehbasic.rom
This is Lee Davison's Enhanced 6502 BASIC.
To use this ROM image, just copy the file 'ehbasic.rom' into the directory
where you run Symon. Rename the file to 'rom.bin'. When you start Symon,
the ROM file will be automatically loaded at address $d000.
The EhBASIC ROM can be loaded either through the "File -> Load ROM..."
menu in Symon, or by specifying the path to "ehbasic.rom" with
the "-jar" command line option when running Symon, for example:
`java -jar symon-1.3.2.jar -rom samples/ehbasic.rom`
Click the "Run" button and EhBASIC should automatically start running.
Type 'C' to do a cold start.
Then, type $C000 when prompted for the memory size.
NOTE: EhBASIC only wants upper-case input. This confused me at first!
Then, type '49152' (without the quotes) when prompted for the memory size.
More information can be found in the 'ehbasic' directory, and by visiting
the EhBASIC web page: