status of c1530 emulation?

[nippur72]

what is the status of the c1530 emulation, is it working?

I'm trying to make it work with the VIC-20, but after vic20_insert_tape() and vic20_play_tape() the SENSE and MOTOR stay unchanged. I can't go beyond the PRESS PLAY ON TAPE.

I noticed that C1530_CASPORT_MOTOR pin is written by c1530_play() and c1530_stop(), but I think this should be an input pin to the tape, not output.

[floooh]

The tape emulation worked at one point, but you're right, it appears to be broken currently (in the C64 at least, since this should work: https://floooh.github.io/tiny8bit/c64-ui.html?file=c64/boulderdash_c64.tap ), most likely when I moved the tape loader code out of the C64 emulation and into its own header (but I could've sworn that I tested tape loading at that time, so it probably broke later when I rewrote the C64 from 'instrution ticked' to 'cycle ticked').

After calling the play_tape function, at least the SENSE pin should switch from 1 to 0, I'm not sure why the c1530_play() function would also clear the MOTOR pin though. I should add a C1530 debug UI to better see what's going on there.

Glancing over this changelog which moved the tape code out into its own header:

362d41f#diff-9936031ddd3b8f394a5ea4d8c278df21

...I can't find an obvious problem, what's now the C64_CASPORT_SENSE flag was a bool "tape_button" before (with the only difference that CASPORT_SENSE is "active low", so tape_button==true is CASPORT_SENSE==0.

...but as with your pull requests unfortunately I don't currently have time to look into this, it needs to wait until I return to a week or two of emulator coding.

[floooh]

not sure why the c1530_play() function would also clear the MOTOR pin though

it appears that the "old code" (search for the c64_start_tape function here: 362d41f#diff-9936031ddd3b8f394a5ea4d8c278df21) also switched the motor flag, so that doesn't seem to be the problem...