update README + screenshot

Author: dbalsom

README.md

@@ -1,3 +1,45 @@
 # LittleBlue
 
-An SDL3 interface to reenigne's XTCE 8088 emulator.
+An SDL3 interface to [reenigne's](https://reenigne.org) XTCE 8088 emulator.
+
+## XTCE
+
+XTCE is a cycle-interruptable, microcode-based 8088 emulation core. It was developed by the brilliant demo-coder reenigne, 
+one of the programmers behind such amazing demos as [8088 MPH](https://www.youtube.com/watch?v=yHXx3orN35Y) and [Area 5150](https://www.youtube.com/watch?v=fWDxdoRTZPc).
+
+Unfortunately, the massive technical accomplishment that XTCE represents has been somewhat overlooked considering that XTCE lacks such amenities as a display, keyboard, floppy disk controller, etc.
+
+reenigne simply hasn't had the time to build XTCE out into a full-featured emulator.
+
+I wanted to change that.
+
+LittleBlue is the fusion of device implementations from MartyPC and reenigne's XTCE CPU core, adding a front-end utilizing SDL3 for rendering and Dear Imgui for a debugging interface.
+
+![screenshot_01](/images/screenshot_01.png)
+
+## Debugger Features
+
+ - CPU Status with registers, instruction queue contents
+ - Step CPU by cycle or instruction
+ - Single code breakpoint (CS:IP)
+ - Memory Viewer
+ - VRAM Viewer
+ - Stack display
+ - Instruction Disassembly
+ - CRTC register viewer
+
+## Hardware Implementation Status
+
+Currently, LittleBlue has emulation of the following:
+
+ - 8088 CPU
+ - 8253 PIT
+ - 8259 PIC
+ - 8255 PPI
+ - 8237 DMA Controller
+ - IBM CGA video card (in text mode)
+
+What it is currently lacking:
+
+ - Keyboard
+ - Floppy Disk Controller