Awesome

IKBD

This repository contains a verilog implementation of the HD6301 running the rom of the Atari ST ikbd within a verilator environment. This is based on tje HD63701 project.

The rom being used is from later keyboard revisions which use a different approach to select mouse and joystick signals.

To use it enter make in the tb directory and watch the ikbd.vcd using e.g. gtkwave. Furthermore some events will be reported on the console:

./ikbd_tb
@2.50µs out of reset
@65218.25µs IKBD RX f1 => BOOT OK V1 or KEY RELEASE KEYPAD-.
@80000.00µs Test relative mouse movement
@80000.00µs Should end at X:-10, Y:10
@100000.00µs PS2 TX 09
@100918.50µs PS2 TX 0a
@101837.00µs PS2 TX 14
@105666.25µs IKBD RX f8 => MOUSE REL L:off R:off
@106946.25µs IKBD RX 01 => MOUSE X 1=1
@108226.25µs IKBD RX 00 => MOUSE Y 0=0
@109506.25µs IKBD RX f8 => MOUSE REL L:off R:off
@110786.25µs IKBD RX 01 => MOUSE X 1=2
@112066.25µs IKBD RX 01 => MOUSE Y 1=1
@113346.25µs IKBD RX f8 => MOUSE REL L:off R:off
@114626.25µs IKBD RX 04 => MOUSE X 4=6
@115906.25µs IKBD RX 04 => MOUSE Y 4=5
@117186.25µs IKBD RX f9 => MOUSE REL L:on R:off
@118466.25µs IKBD RX 01 => MOUSE X 1=7
@119746.25µs IKBD RX 01 => MOUSE Y 1=6
@121026.25µs IKBD RX f9 => MOUSE REL L:on R:off
@122306.25µs IKBD RX 02 => MOUSE X 2=9
@123586.25µs IKBD RX 07 => MOUSE Y 7=13
@124866.25µs IKBD RX f9 => MOUSE REL L:on R:off
@126146.25µs IKBD RX 00 => MOUSE X 0=9
@127426.25µs IKBD RX 04 => MOUSE Y 4=17
@128706.25µs IKBD RX f9 => MOUSE REL L:on R:off
@129986.25µs IKBD RX 00 => MOUSE X 0=9
@131266.25µs IKBD RX 02 => MOUSE Y 2=19

In this case the IKBD sends its default boot message $f1 after ~65ms. Then the testbench sends a PS2 mouse movement event into tke IKBD and replies with a set of relative mouse movement events.

More test patterns can be selected in tb/ikbd_tb.cpp.

Current state

The IKBD seems to be working completely. A ps2 keyboard and mouse can be parsed into input states for the hd6301. A joystick is also supported on port 1. A second joystick shares the input with the mouse.