EclaireXL

Uh-oh, good spot. Did you check it with aspeqt too? I find that the .xex support (sdrive port) can be a bit iffy at times. I'm not sure if there are better xex loaders we can switch to?

Can someone pick this up and look into the root cause please? Then I can fix the issue with the core.

We can try it. Do you know c? There is atari_drive_emulator.c in the firmware which has a copy of the xex loader. Its an sdrive port and I didn't ever look into the xex side much.

6502 assembly only here :)

XXL posted that he can do a loader and PICODOS source is on Github

https://github.com/Masq666/PicoDOS/blob/master/picodos.asm

Nir

We could add another 6502 for the firmware to replace the zpu. I'd like that but don't have time to spend on that.

Quite a job though to rewrite the firmware.

It contains sd card access, fat filesystem, file browsing and a usb stack.

foft wrote:

We can try it. Do you know c? There is atari_drive_emulator.c in the firmware which has a copy of the xex loader. Its an sdrive port and I didn't ever look into the xex side much.

Are you using this loader?

#ifdef XEX_IMAGES
// The KBoot loader was written by Ken Siders (atari@columbus.rr.com)
byte KBOOT_LOADER[] = {
0x00,0x03,0x00,0x07,0x14,0x07,0x4c,0x14,0x07,0xAA,0xBB,0x00,0x00,0xa9,0x46,0x8d,0xc6,0x02,0xd0,0xfe,0xa0,0x00,0xa9,0x6b,
0x91,0x58,0x20,0xd9,0x07,0xb0,0xee,0x20,0xc4,0x07,0xad,0x7a,0x08,0x0d,0x76,0x08,0xd0,0xe3,0xa5,0x80,0x8d,0xe0,0x02,0xa5,
0x81,0x8d,0xe1,0x02,0xa9,0x00,0x8d,0xe2,0x02,0x8d,0xe3,0x02,0x20,0xeb,0x07,0xb0,0xcc,0xa0,0x00,0x91,0x80,0xa5,0x80,0xc5,
0x82,0xd0,0x06,0xa5,0x81,0xc5,0x83,0xf0,0x08,0xe6,0x80,0xd0,0x02,0xe6,0x81,0xd0,0xe3,0xad,0x76,0x08,0xd0,0xaf,0xad,0xe2,
0x02,0x8d,0x70,0x07,0x0d,0xe3,0x02,0xf0,0x0e,0xad,0xe3,0x02,0x8d,0x71,0x07,0x20,0xff,0xff,0xad,0x7a,0x08,0xd0,0x13,0xa9,
0x00,0x8d,0xe2,0x02,0x8d,0xe3,0x02,0x20,0xae,0x07,0xad,0x7a,0x08,0xd0,0x03,0x4c,0x3c,0x07,0xa9,0x00,0x85,0x80,0x85,0x81,
0x85,0x82,0x85,0x83,0xad,0xe0,0x02,0x85,0x0a,0x85,0x0c,0xad,0xe1,0x02,0x85,0x0b,0x85,0x0d,0xa9,0x01,0x85,0x09,0xa9,0x00,
0x8d,0x44,0x02,0x6c,0xe0,0x02,0x20,0xeb,0x07,0x85,0x80,0x20,0xeb,0x07,0x85,0x81,0xa5,0x80,0xc9,0xff,0xd0,0x10,0xa5,0x81,
0xc9,0xff,0xd0,0x0a,0x20,0xeb,0x07,0x85,0x80,0x20,0xeb,0x07,0x85,0x81,0x20,0xeb,0x07,0x85,0x82,0x20,0xeb,0x07,0x85,0x83,
0x60,0x20,0xeb,0x07,0xc9,0xff,0xd0,0x09,0x20,0xeb,0x07,0xc9,0xff,0xd0,0x02,0x18,0x60,0x38,0x60,0xad,0x09,0x07,0x0d,0x0a,
0x07,0x0d,0x0b,0x07,0xf0,0x79,0xac,0x79,0x08,0x10,0x50,0xee,0x77,0x08,0xd0,0x03,0xee,0x78,0x08,0xa9,0x31,0x8d,0x00,0x03,
0xa9,0x01,0x8d,0x01,0x03,0xa9,0x52,0x8d,0x02,0x03,0xa9,0x40,0x8d,0x03,0x03,0xa9,0x80,0x8d,0x04,0x03,0xa9,0x08,0x8d,0x05,
0x03,0xa9,0x1f,0x8d,0x06,0x03,0xa9,0x80,0x8d,0x08,0x03,0xa9,0x00,0x8d,0x09,0x03,0xad,0x77,0x08,0x8d,0x0a,0x03,0xad,0x78,
0x08,0x8d,0x0b,0x03,0x20,0x59,0xe4,0xad,0x03,0x03,0xc9,0x02,0xb0,0x22,0xa0,0x00,0x8c,0x79,0x08,0xb9,0x80,0x08,0xaa,0xad,
0x09,0x07,0xd0,0x0b,0xad,0x0a,0x07,0xd0,0x03,0xce,0x0b,0x07,0xce,0x0a,0x07,0xce,0x09,0x07,0xee,0x79,0x08,0x8a,0x18,0x60,
0xa0,0x01,0x8c,0x76,0x08,0x38,0x60,0xa0,0x01,0x8c,0x7a,0x08,0x38,0x60,0x00,0x03,0x00,0x80,0x00,0x00,0x00,0x00,0x00,0x00
};
#endif

It may not work properly. I wrote a similar loader for the SIO2WiFi project, I can share it.

Using this one:
uint8_t boot_xex_loader¹⁷⁹ = {
0x72,0x02,0x5f,0x07,0xf8,0x07,0xa9,0x00,0x8d,0x04,0x03,0x8d,0x44,0x02,0xa9,0x07,
0x8d,0x05,0x03,0xa9,0x70,0x8d,0x0a,0x03,0xa9,0x01,0x8d,0x0b,0x03,0x85,0x09,0x60,
0x7d,0x8a,0x48,0x20,0x53,0xe4,0x88,0xd0,0xfa,0x68,0xaa,0x8c,0x8e,0x07,0xad,0x7d,
0x07,0xee,0x8e,0x07,0x60,0xa9,0x93,0x8d,0xe2,0x02,0xa9,0x07,0x8d,0xe3,0x02,0xa2,
0x02,0x20,0xda,0x07,0x95,0x43,0x20,0xda,0x07,0x95,0x44,0x35,0x43,0xc9,0xff,0xf0,
0xf0,0xca,0xca,0x10,0xec,0x30,0x06,0xe6,0x45,0xd0,0x02,0xe6,0x46,0x20,0xda,0x07,
0xa2,0x01,0x81,0x44,0xb5,0x45,0xd5,0x43,0xd0,0xed,0xca,0x10,0xf7,0x20,0xd2,0x07,
0x4c,0x94,0x07,0xa9,0x03,0x8d,0x0f,0xd2,0x6c,0xe2,0x02,0xad,0x8e,0x07,0xcd,0x7f,
0x07,0xd0,0xab,0xee,0x0a,0x03,0xd0,0x03,0xee,0x0b,0x03,0xad,0x7d,0x07,0x0d,0x7e,
0x07,0xd0,0x8e,0x20,0xd2,0x07,0x6c,0xe0,0x02,0x20,0xda,0x07,0x8d,0xe0,0x02,0x20,
0xda,0x07,0x8d,0xe1,0x02,0x2d,0xe0,0x02,0xc9,0xff,0xf0,0xed,0xa9,0x00,0x8d,0x8e,
0x07,0xf0,0x82 };
// relokacni tabulka neni potreba, meni se vsechny hodnoty 0x07
// (melo by byt PRESNE 20 vyskytu! pokud je jich vic, pak bacha!!!)

This (http://www.64kib.com/atarixlfpga_svn/trunk/atari_800xl/firmware/atari_drive_emulator.c) is not the latest code (need the svn branch, this is easier for me to link...), but it shows how it does the xex access.

I'm wondering about splitting the firmware up and running on more smaller cpus (such as 6503). e.g. one instance for drive emulation, one for the screen stuff, one for USB access. Using a single CPU there are latency concerns which got quit fiddly after USB introduction. Though I guess that is mostly solved now by the fifo setup for SIO.