Commander X16

If that's true, then there's a flaw in x16-emulator; the virtual filesystem code only updates STATUS on error conditions. I'll need to file a bug...

So, I've got this port of CP/M to the 6502. Previously I had it working on the X16. I recently tried it and found that it hangs on startup. Seems the problem is this code, which reads a file from disk. (My structured programming macros should be obvious.) ldy #0 zrepeat sty STATUS jsr ACPTR ; read a...

<blockquote class="ipsQuote" data-ipsquote="" data-ipsquote-contentapp="forums" data-ipsquote-contentclass="forums_Topic" data-ipsquote-contentcommentid="22909" data-ipsquote-contentid="4788" data-ipsquote-contenttype="forums" data-ipsquote-timestamp="1666122798" data-ipsquote-userid="73" data-ipsqu...

<blockquote class="ipsQuote" data-ipsquote="" data-ipsquote-contentapp="forums" data-ipsquote-contentclass="forums_Topic" data-ipsquote-contentcommentid="22875" data-ipsquote-contentid="4788" data-ipsquote-contenttype="forums" data-ipsquote-timestamp="1666031999" data-ipsquote-userid="175" data-ipsq...

My one puts the BDOS and CCP in high RAM, leaving the entire low RAM area for the TPA. I wish the I/O area didn't split up the RAM but, well, tradition, I suppose! My original development platform was the BBC Micro; but it puts the I/O up high at 0xfc00. On the Master, which has banked RAM, it's th...

I recently did a port of CP/M to the 6502, and have just made it work on the X16, more or less. See <a href="https://github.com/davidgiven/cpm65" rel="external nofollow">https://github.com/davidgiven/cpm65</a>. There's currently no actual 6502 CP/M <em>software</em>, so it's of questionable utility...

Actually, I realise now that I was mixing up the X16 and the Mega65! The X16 is much less like a C64. Unfortunately, I don't think the X16 can effectively run Fuzix. AFAICT there's only a single 8kB memory window at 0xa000. As on these systems Fuzix has to use memory mapping for task switching, tha...

There are some 6502 Fuzix ports, of varying degrees of workingness. The main issue is that everything's written in C, and the 6502 is a very difficult architecture to compile C for, with really bloaty code. Hardware-wise, Fuzix wants to be able to bank-switch memory starting at 0x0000 with a fixed ...