Byron Lathi
5e03795c09
Get something simulated
...
Infinite loop being caused somewhere
2023-09-21 23:22:17 -07:00
Byron Lathi
1f503b2d80
update sim environment
2023-09-21 20:35:52 -07:00
Byron Lathi
e50203dd3e
Add generic SDR
2023-09-21 19:23:31 -07:00
Byron Lathi
d37e32ec64
Add sim cpu
2023-09-18 23:27:54 -07:00
Byron Lathi
b30e4c73fb
Merge branch '22-organize-project-better' into 'master'
...
Resolve "Organize Project Better"
Closes #22
See merge request bslathi19/super6502!22
2023-09-19 02:57:26 +00:00
Byron Lathi
c466c62969
Resolve "Organize Project Better"
2023-09-19 02:57:26 +00:00
Byron Lathi
a770d938de
Copy bios device functions to kernel
2023-09-04 14:31:55 -07:00
Byron Lathi
791bffb248
Add copy data back
2023-09-04 14:08:52 -07:00
Byron Lathi
15b7d50a30
Fix zerobss bug
...
Well, not really fix but problem is avoided for now
2023-09-01 21:49:36 -07:00
Byron Lathi
1d5215187e
Merge branch 'kernel_crashing' into 'master'
...
Kernel crashing
Closes #6
See merge request bslathi19/super6502!20
2023-08-26 23:15:37 +00:00
Byron Lathi
b2b3b84bc4
Kernel crashing
2023-08-26 23:15:36 +00:00
Byron Lathi
eba24c2990
Disable inits which fail
2023-08-26 13:42:06 -07:00
Byron Lathi
0dfe8ae584
Remove init code to get kernel to run
2023-08-26 13:17:12 -07:00
Byron Lathi
0247565f49
Get super simple kernel code running
2023-08-26 13:09:02 -07:00
Byron Lathi
3487f35af8
Merge branch 'bios' into 'master'
...
#4 Load entire kernel into memory
See merge request bslathi19/super6502!19
2023-08-26 15:14:25 +00:00
Byron Lathi
d2700a64fb
Read entire file into memory
2023-08-26 08:10:20 -07:00
Byron Lathi
4b2b1a425e
Parse options properly
2023-08-25 21:26:28 -07:00
Byron Lathi
a971e7a717
Start reading options
2023-08-25 20:03:03 -07:00
Byron Lathi
21b456067a
Read text and data offset/length
2023-08-25 19:22:21 -07:00
Byron Lathi
155b2c2972
Merge branch 'bios' into 'master'
...
Link bootloader with bios to get access to symbols
See merge request bslathi19/super6502!18
2023-08-24 04:15:04 +00:00
Byron Lathi
becc9094c8
Don't save segments as separate files
2023-08-23 21:12:15 -07:00
Byron Lathi
eb72e83629
Use old offset calculation, save ptr3
...
Looks like cprintf modifies ptr3, so make sure to save it if you are
calling that.
There also may have been an issue with how the previous sector address
was calculated, the one which does not account for carries seems to
work.
2023-08-23 20:48:57 -07:00
Byron Lathi
8273e01ad8
Read size of file in sectors
2023-08-23 20:45:09 -07:00
Byron Lathi
9b1576774b
Factor out relocation code into method
2023-08-23 19:52:11 -07:00
Byron Lathi
cc1d8d2015
Update o65dump to show reloc and undef symbols
2023-08-23 00:11:57 -07:00
Byron Lathi
8bccfed867
Change segment order to make o65 layout valid
...
VECTORS was messing things up
2023-08-22 20:49:07 -07:00
Byron Lathi
c5b1a47c8e
start o65dump.py
2023-08-22 19:27:26 -07:00
Byron Lathi
9972f8cb36
Update order for kernel segments
2023-08-22 19:27:09 -07:00
Byron Lathi
851c26e4dd
Print out filenames as we read them
2023-08-21 20:02:57 -07:00
Byron Lathi
de9353a009
Find kernel in second stage bootloader
2023-08-21 19:33:52 -07:00
Byron Lathi
906516c4b5
Add comments and use less magic
2023-08-15 23:06:10 -07:00
Byron Lathi
68ff523b10
Use actual values from sd card
2023-08-15 19:30:11 -07:00
Byron Lathi
dfdb41a875
Automatically copy rom image and warn about rebuild
2023-08-14 23:44:51 -07:00
Byron Lathi
a657957ae2
Load a multi-sector file and execute it
2023-08-14 20:44:27 -07:00
Byron Lathi
3bd022107e
Read start cluster
2023-08-14 20:21:03 -07:00
Byron Lathi
937a04c891
Remove some debug info
2023-08-12 19:16:46 -07:00
Byron Lathi
053b0d7e3e
Find bootloader in FAT
2023-08-12 19:03:24 -07:00
Byron Lathi
fd9389268a
Load root directory from sd card
2023-08-12 16:09:03 -07:00
Byron Lathi
7039e649bb
Update cc65
2023-08-12 12:28:16 -07:00
Byron Lathi
7ad1079289
Restart kernel
2023-08-12 11:59:45 -07:00
Byron Lathi
069ae5db4b
Update format script
...
I think there may still be some issues with a drive that is formatted
wrong, but it works consistently right now.
When modifying the boot sector, it now leaves alone the partition tables
and the bios parameter block. This does reduce the amount of code from
510 bytes to 380, but this is find as it only takes about 29 bytes to
load a sector into memory.
2023-08-09 22:46:18 -07:00
Byron Lathi
d191c1da5b
Modify disk script to leave partition table intact
2023-08-08 23:52:57 -07:00
Byron Lathi
6b0caea84c
Link bootloader with bios to get access to symbols
...
By doing this we don't need to call bios functions, we can just jsr
directly to the addresses. This does mean that everytime the bios
changes the bootloader has to change, but ideally all the bootloader
does is load the bios and then get remapped out of memory. Any important
drivers like file system can be loaded from the bootloader.
This also means that the runtime functions are located in the bios for
the bootloader, so the rom will have to stay mapped in until the kernel
is started, at which point it will have its own runtime and the rom and
bootloader are no longer needed.
2023-08-08 22:16:42 -07:00
Byron Lathi
e73c4e1d08
Rewrite readblock in assembly
2023-08-08 19:28:10 -07:00
Byron Lathi
446f4e7539
Get bios calls starting to work
2023-08-06 21:41:15 -07:00
Byron Lathi
6b42843f4b
remote testing code
2023-07-31 20:03:59 -07:00
Byron Lathi
18b8ac7ccf
Rename bootloader to bios, add actual bootloader
2023-07-31 19:58:32 -07:00
Byron Lathi
5128fe64b6
Merge branch 'spi_master' into 'master'
...
add spi controller and sd asm code.
See merge request bslathi19/super6502!17
2023-07-29 22:32:21 +00:00
Byron Lathi
096472e084
Get SD card reads working
2023-07-23 22:44:19 -07:00
Byron Lathi
d16675ed3c
Consolidate resp3 and resp7, fix stack issue
...
wasn't pushing res to stack, which makes stack pointer wrong
2023-07-23 21:45:54 -07:00
