OS Apps:

Standard & Extended ASCII Chart with Displayable Characters

Overview:

A portion of the SBC30 code has been sliced and edited as  SBC30_TEST_OS_03d.asm for the ASCII Chart function. The SIM will provide an input of "1" to select the menu item.

Tester:

Oshonsoft 6502 Simulator IDE v1.45

Setup:

Setup your IDE as shown in the top screenshot adjacent.

In the Peripheral Devices window:

- set Device 1 to be an INput on port $5000 with a One-Shot IN value of 31 (for the number 1)

- Set Output Terminal to I/O Port $5000

- Set Input Terminal to I/O Port $5000

Adjust the  Memory Editor to show address $0000.

No Watch Variables are needed.

SIM Breakpoints:

The only BP needed is at 2574 for the RTS to end the program.

Use <CTRL><F6> to get you to the breakpoints. Use <F2> at each to get a feel for what is occurring, then continue to the next BP using <CTRL><F6>.

App Operation:

Using the FlashROM code and not the Sim, here are the keystrokes needed to produce the adjacent lower screenshot:

- Press Reset button

- O

- 1

IDE Operation:

If you wish to burn the code to flashROM, try this latest build: SBC30_0_R9d.bin

Oshonsoft 6502 Simulator IDE

(Click to Enlarge)

Sim IDE

ASCII Terminal