I was rereading GARTHWILSON Primer again this morning and realized the same thing. Tonight I am hopping to wire up the RAM but until then I made the following changes to test before adding more I/C's.


; Assembler Setup & Configure
.CR 6502
.TF C:\Software\sbasm3\Projects\Bin\test_2.bin,BIN
.IN ...

Yea they are I made a small mistake retypeing in on my other computer I don't have internet (network card failed) on my programming machine so I retypeing in the code when I made that post here sorry about that.

ok I see that issue Here is the updated code. I am still having the same issue.

.CR 6502
.TF c:\sbasm3\Projects\Bin\test.bin,BIN
.IN c:\sbasm3\Projects\Include\VIA_Setup.65s
MSCNT .EQ 199
YCNT .EQ 1
.OR $0000
LDA #0
STA PCR
LDA #$FF
STA DDRB
Start: LDA #$66
STA PORTB
LDY YCNT
JSR Delay ...

Update I programmed the ROM with a lot of NOP codes in place of the jumps commands to just retest to make sure it is not an hardware issue and I got it to change the display. So I think it may be something todo with my jump code that is causing the issue but just can't figure out what it is.

Thanks ...

I looked at my code again and I am just loading A with data from location 50 then checking to see if the data at that point is 10 or more. Then displaying the number. I tried changing to to LDX and it still didn't work. I scaled down the program a lot just to check the function of the Delay task ...

Lol wow yea I just saw that. Thanks I will try that and let you know.

Hello all I am new to the 6502 world. I just started building my own SY6502 system. So far I have the SY6502 running at 2MHz with an SY6522 wired up on a bread board. I also wired up an 28HC64 EEPROM. Still working on the RAM (waiting on another breadboard to show up. I have also started to wire up ...