Skip to content

Latest commit

 

History

History
94 lines (62 loc) · 1.98 KB

TO-DO.adoc

File metadata and controls

94 lines (62 loc) · 1.98 KB

To-do list of TR-DOS disassembled

2018-03-23:

Entry l1e67h is used to load the last sector of a file to the buffer.

2017-03-10:

Study the two routines called by entry.init_dos.

2017-02-12:

Fix word not disassembled at 0x1081.

2017-02-10:

Variable variable.move_command_first_track is used also to store the input flag of load_or_verify (command $0E):

        A=#00 - take address and length from disk catalogue;
        A=#03 - take address in HL length in DE;
        A=#FF - take address in HL but length taken from disk catalogue;
2016-09-02:

Study the routine at 0x1FB9.

2016-09-02:

Label 0x4080, screen address used to store a routine copied from the ROM (0x2A41).

2016-09-02:

Study table at 0x31C8.

2016-09-02:

Study code at 0x22C4.

2016-09-02:

Study meaning of literals (file types?) in:

  • ld (hl),044h ;22d8 36 44 6 D

  • ld (hl),043h ;2b0e 36 43 6 C

2016-09-02:

Three bytes at 0x2FF0 are disassembled as data, but they are code (ldir / ret). This seems a bug of z80dasm.

2016-09-02:

z80dasm’s bug? This block causes addresses 0x31FA..0x31FC be interpreted as bytedata, in one single line: not_used_31FD: start 0x31FD unlabeled last 0x3CF9 type bytedata.

This does not solve the problem: code_31FA_XXX_FIXME: start 0x31FA unlabeled last 0x31FC type code.

2016-09-15:

It seems there’s a typo in the ROM:

	defb 053h		;3179	53 	S
	defb 043h		;317a	43 	C
	defb 052h		;317b	52 	R
	defb 045h		;317c	45 	E
	defb 045h		;317d	45 	E
	defb 04eh		;317e	4e 	N
	defb 004h		;317f	04 	.  should be 24 (character '$')
	defb 084h		;3180	84 	.  should be 80
	defb 053h		;3181	53 	S
	defb 043h		;3182	43 	C
	defb 052h		;3183	52 	R
	defb 045h		;3184	45 	E
	defb 045h		;3185	45 	E
	defb 04eh		;3186	4e 	N
	defb 084h		;3187	84 	.  should be a4 (=24+80)