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Donkey Kong - WIP

Ice Climber - First Light

Excitebike - Scrolling

Full-screen scroll that blends three layers of data together. The static moon in the background is stored in Bank 0, the tile map rendering into the GTE code field, and the fog is combined with an ORA instruction.

SCB Binding - Demo 2

Basic implementation of APU emulation using the IIgs Ensoniq hardware. Counters/Sweep/Envelope implement for Pulse 1, Pulse 2 and Triangle channels.

A demo that exercises many of engine's features

Finished implementation of BG1 per-scanline offsets. The secondary layer can still be scrolled independent of the scanline offsets and BG0 scrolling and offset support remains intact.

Excite Bike - First Light

Ice Climber - Progress Update 2

Hunt the Wumpus IIgs

Secondary background with per-scanline offsets in primary background

IIgs APU Implementation vs. NES Emulator

Test of an efficient rendering mode for the Apple IIgs NES runtime layer that maintains around 15fps at stock (2.8Mhz) speed. #appleiigs #smb #nes #coding

An updated WIP of Ice Climber using the recent Horizontal Mirroring implementation. Significantly better than what was seen in th-cam.com/video/KalPgDANIaQ/w-d-xo.html

First build that has the NES horizontal mirroring mode implemented. The video shows the entire coordinate range of the XSCROLL and YSCROLL registers. The illegal values of for vertical coordinate (240 - 255) and (496 - 511) are supported as well.

SMB GS Prototype (with glitches)

Sample showing the sprite stress-test with the new rendering mode.

Balloon Fight IIgs - Standard vs Dirty Rendering

SuperMarioGS (WIP) - Audio Work (4) - Warp to World 8

*KansasFest 2023: Porting a Classic Game to a Classic Computer

SuperMarioGS (WIP) - Audio Work (3) - Long Play (World 1)