Crude single-step with more blinkenlights
Posted: 08 Nov 2019, 22:29
Hello,
I've had my Gigatron for a few weeks and I have added the ability to single-step the ROM address by using an external clock. Also, there is a display of the output of the ROM as follows:
Data (D)- 8 bits- msb on the left - these will become D7:0 and BUS7:0
Instruction (IR) - these will become IR7:0
….red leds: IR7:5 (msb on top) - INSTRUCTION
….green leds: IR4:2 (msb on top) - MODE
….yellow leds: IR1:0 (msb on top) - BUS ACCESS
I still would like to have the ability to single-step while maintaining the VGA output. Previous discussions have taught me that this would be very hard without code modification.
Here's a quick video of what I have now:
https://drive.google.com/open?id=1kNNg_ ... GF_0NAwnBP
Bob
I've had my Gigatron for a few weeks and I have added the ability to single-step the ROM address by using an external clock. Also, there is a display of the output of the ROM as follows:
Data (D)- 8 bits- msb on the left - these will become D7:0 and BUS7:0
Instruction (IR) - these will become IR7:0
….red leds: IR7:5 (msb on top) - INSTRUCTION
….green leds: IR4:2 (msb on top) - MODE
….yellow leds: IR1:0 (msb on top) - BUS ACCESS
I still would like to have the ability to single-step while maintaining the VGA output. Previous discussions have taught me that this would be very hard without code modification.
Here's a quick video of what I have now:
https://drive.google.com/open?id=1kNNg_ ... GF_0NAwnBP
Bob