Re: ARGGGGG

Okay. I think I figured out all my digit doodleing. I use the term opcode
for the 3 bit command that the state machine looks at initally.

>
> Strobe 0 - For Odd Opcodes - Push VGPC onto VGStack
                For Even - Sets the NORM flag

                
> Strobe 1 - Opcode 0,2 - Scale Flag
                opcode 5 - Stack ++
                opcode 6 - Stack --

> Strobe 2 - opcode 3 - (DVY12) : STATCLK
                             (!DVY12): SCALE
                opcode 5 - Jump to Y
                opcode 6 - Pull VGPC from Stack

> Strobe 3 - opcode 0,2 Go Vector
                opcode 1 Halt
                opcode 4 Center Beam

By looking at the .pdf I scanned and knowing your data at VGRAM,0x001
you should be able to follow through each step of the state machine
and see all the meaningful operations take place. If you can control
the VGCLOCK then you could technically check all this with a logic
probe to find your problem IC.

later, good luck
  jess
Received on Tue Aug 24 01:39:12 1999