I did manage to figure it out... I misread the listing and just ignored BPL, which was the culprit here... So I fixed that... More errors to fix, but that's for another day. Thanks Klaus for making a piece of very useful software

By jump relatively, I of course mean the BEQ...

This is really bothering me...

processor 6502
org $0
.byte $00

seg CODE
org $0400
.start
lda #$23
tax
tay
lda #0
jmp .jmptst
.fisk stx $f001
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop ...

Ahhh yes, that makes sense now... Thanks

So negative branch offset start would be the beq address, but positive branch offset would be the next instruction address?

I've written my own 65C02 emulator for my ongoing 8bit project, but I seem to be stuck with running this test at the BEQ range test.

046a : a0fe ldy #$fe ;testing maximum range, not -1/-2 (invalid/self adr)
046c : range_loop
046c : 88 dey ;next relative address
046d : 98 tya
046e : aa tax ...

That certainly did the trick! Thanks!

I'm doing a FIELD in WinCUPL for a 22V10, but as soon as I want to use the .d flip flop part for synchronizing with a master clock on pin one, using something like out.d = input:[0..2FF] doesn't work... Do I really have to spell out the full logic equation or is there some way to get around that ...

Wouldn't it be best to use the software provided by the manufacturer? If you have a parallel port and can run windows (even in a VM, perhaps) then you're good to go.
Oh, for me it is working wonderfully. It was more to see if there was anything interesting on the inside for others... Especially ...

Hi,

about a year ago, I bought an Advin Pilot-MVP on ebay for about $70. It seems to be quite simple on the inside, no microcontroller, discrete parts and only an EEPROM for some identification from what I can tell... Would anyone want hi-res images of the board to reverse engineer the schematic as ...

Thanks for the suggestions, but I didn't mean a list of 7400 logic, but a library of circuits already predesigned for a specific function. I've already been looking at designing stuff myself and reuse circuit blocks for the same functions across board instead of just reinventing the wheel over and ...

I've been looking around on the web for something like a library with 7400 logic used to perform various functions, like a register or a range comparator circuit (say 8bit, has to be within the range of 0b00110000 and 0b00110011), but I've yet to find something useful. Have you guys any pointers to ...

I'll keep the updates for this in here.

Project parts planned so far:

Main part:
R6502 4MHz,128KB RAM, Simple I/O (Gamepad input only?)

Graphics:
64KB RAM
320x240 VGA, 4bit color palette (might bump it to 8bit, but will see, depends on how complex the schematic will become)

Audio:
Not yet ...

The 6502 game console project:

Rockwell 6502 4MHz
128KB memory + 64KB for Graphics + 2KB Color Palette & possibly memory for audio as well
320x240 16 color palette VGA output
Gamepad input as idea, might be something else entirely
74xx series logic for as many things as possible, for understanding ...

Hi,

first of all, thanks to Mike for making me an account. I've been lurking a bit in here as I have two 6502 projects in the pipeline. One is a SBC to use as a simple console and the other one will eventually be a full blown machine with all the bells and whistles. Currently I am looking at making ...