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jefftranter/6502
Invalid character in path name

Hello Jeff, I m interested in using your JMON as a basis of a test ROM. However .. the git fails to clone due to (I think) a bad character in a path. basic/OSI/disk1/BEXEC* I ve downloaded the ZIP and ...
  • MikeMnemonic
  • 1
  • Opened 
    on Sep 22, 2024
  • #26

jefftranter/6502
New design board

is it possible to reduce pcb dimension 100x100mm or in alternative please upload all files needed to modify pcb. thanks
  • mciucci65
  • 6
  • Opened 
    on Sep 14, 2024
  • #25

jefftranter/6502
cc65 apple1 target ?

Hi, I noticed that in one of your Makefiles you are using cc65 to build for apple1, specifically in https://github.com/jefftranter/6502/tree/master/c/adventure1 however cc65 on my system errors with: ...
  • ijean
  • 7
  • Opened 
    on Feb 20, 2023
  • #21

jefftranter/6502
Typo in the Cassette Load and Save section of KIM-1 Quick Reference

The 1st instructions in both the Save and Load sections specify to store value $00 in $00F1 which resets the Decimal mode flag. This is correct however it is to ensure that the CPU is in BINARY mode. The ...
  • Robert-Di-Benedetto
  • 1
  • Opened 
    on Feb 10, 2023
  • #20

jefftranter/6502
Possible issue in Apple ][ system monitor mini-assembler

In the Apple ][ system monitor port, there are numerous conditional assembly sections for porting to the Apple I, mostly to handle the different hardware. However, I noticed that some of these conditionals ...
  • svhum
  • 1
  • Opened 
    on Feb 8, 2023
  • #19

jefftranter/6502
Minor error in port of Apple ][ System Monitor

I believe there may be an error in this port of the Apple ][ System Monitor. Line 1999 reads: IOPRT1: LDA COUT1/256 This attempts to load the accumator with the high byte of the address of subroutine COUT1. ...
  • svhum
  • 1
  • Opened 
    on Jan 18, 2023
  • #18

jefftranter/6502
It is possible to detect instruction fetch on 6809E

I m planning to build a version of this analyzer to use with the 6809E, which has some differences from the 6809. Among them, it is possible to detect the beginning of instruction fetch by snooping the ...
  • thorpej
  • Opened 
    on Apr 6, 2022
  • #17

jefftranter/6502
A1 BASIC relocation

The A1 BASIC as it is will not assemble and standalone if you try to relocate the code. There are hard coded references to the pages used in the code and in certain tables. It will work (and largely use ...
  • w4jbm
  • 1
  • Opened 
    on May 28, 2021
  • #16

jefftranter/6502
6502 logic analyzer schematic incorrect pin number

The physical pin numbering for the teensy chip U1 is incorrect, the right hand side numbering is reversed, the bottom starts at pin 48, rather than pin 25
  • stewie66
  • 1
  • Opened 
    on May 25, 2021
  • #15

jefftranter/6502
JMON srecord end address issue

JMON allows creation of Moto S record dumps. The current source will not do complete dumps for some specified ranges. Specifying either $2000-$201F or $2000-$2020 will both dump up to $201F and stop. ...
  • w4jbm
  • 1
  • Opened 
    on Apr 25, 2021
  • #14
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