Search found 11 matches

by dwesti
Tue Nov 14, 2023 8:27 am
Forum: Emulation and Simulation
Topic: Linux console-based 6502 emulator anywhere?
Replies: 29
Views: 38825

Re: Linux console-based 6502 emulator anywhere?

anyone tried to compile source for windows? got a lot of errors.
by dwesti
Tue Apr 02, 2019 9:21 am
Forum: Nostalgia
Topic: Sweet-16 on Apple ii
Replies: 8
Views: 3405

Re: Sweet-16 on Apple ii

barrym95838,
thank you for example.
Can you explain how bytecode Dr works?
I've found description, but I do not understand:

Code: Select all

;DR	1	ACC<-ACC-R
;Dn          CPR  n          R13 <-- (R0) - (Rn),R14 <-- status flags.
;Dr CMP r RD=R0-Rr, set status Compare result to RD,w:CPR Rn compare
by dwesti
Sun Mar 31, 2019 8:26 pm
Forum: Nostalgia
Topic: Sweet-16 on Apple ii
Replies: 8
Views: 3405

Re: Sweet-16 on Apple ii

If you select "Apple ][ (Original)" from the Configuration menu, Sweet16 will be waiting there for you at $F689.

What AppleWin version works correct with original A2 ?

Working on SW16 and I had a question: SW16 uses R12 for store return adresses for RS/BS, seems ($18)=$FFFF. From other side ...
by dwesti
Thu Feb 28, 2019 3:58 am
Forum: Programming
Topic: R6501 Disassembler?
Replies: 31
Views: 6379

Re: R6501 Disassembler?

Some opcodes. I think I didn't miss anything
by dwesti
Tue Feb 26, 2019 5:58 am
Forum: Programming
Topic: R6501 Disassembler?
Replies: 31
Views: 6379

Re: R6501 Disassembler?

whartung wrote:
The best test of a disassembler is to disassemble code that you have the source code to and check that it matches.
Better to build all opcode set and check disassembler. Same I did with z80, because code has some errors, only in this case i fixed program.
by dwesti
Tue Feb 26, 2019 5:53 am
Forum: Emulation and Simulation
Topic: Testing instruction timings for 6502 emulators
Replies: 30
Views: 12162

Re: Testing instruction timings for 6502 emulators

Agree. I have enough emulators of real hardware, just interested in code (instruction set etc) for test emulator.
by dwesti
Mon Feb 25, 2019 5:03 am
Forum: Programming
Topic: R6501 Disassembler?
Replies: 31
Views: 6379

Re: R6501 Disassembler?

is exists instruction set for testing disassembler?
by dwesti
Mon Feb 25, 2019 4:59 am
Forum: Emulation and Simulation
Topic: Testing instruction timings for 6502 emulators
Replies: 30
Views: 12162

Re: Testing instruction timings for 6502 emulators

How important timings for an emulator? What code need for make sure what emulator correct?
by dwesti
Wed Oct 31, 2018 4:49 pm
Forum: Nostalgia
Topic: Sweet-16 on Apple ii
Replies: 8
Views: 3405

Re: Sweet-16 on Apple ii

BigEd , thank you, I will read

my attempt to use SW16, it generate A^2 table. Didn't understand all instructions, maybe code must be done simple:



ldy #0

jsr sw16
sub r0;set 0,0 ;r0=0
st 6 ;r6=r0
inr 6
rtn

mm
lda 0
sta sqt,y

lda 1
sta sqt+256,y

jsr sw16
add 6 ; r0=r0+r6
inr 6 ;r6+1
inr 6 ...
by dwesti
Wed Oct 31, 2018 1:15 pm
Forum: Nostalgia
Topic: Sweet-16 on Apple ii
Replies: 8
Views: 3405

Re: Sweet-16 on Apple ii

yes, it works. Thank you!

Is way exists to switch banks via assembler? I found one call - $A59E
by dwesti
Wed Oct 31, 2018 6:48 am
Forum: Nostalgia
Topic: Sweet-16 on Apple ii
Replies: 8
Views: 3405

Sweet-16 on Apple ii

Hello.
I has a question: how to configure emulator for use Sweet-16?

I took AppleWin, but i cannot load binary file at $F689.