Update to include Altair 8800 test.asm

.gitignore

@@ -1 +1,2 @@
 *.hex
+*.prn

src/altair8800/test.asm

@@ -0,0 +1,73 @@
+; test.asm
+; Copyright (C) 2023  William R. Moore
+;
+; This program is free software: you can redistribute it and/or modify
+; it under the terms of the GNU General Public License as published by
+; the Free Software Foundation, either version 3 of the License, or
+; (at your option) any later version.
+;
+; This program is distributed in the hope that it will be useful,
+; but WITHOUT ANY WARRANTY; without even the implied warranty of
+; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+; GNU General Public License for more details.
+; 
+; You should have received a copy of the GNU General Public License
+; along with this program.  If not, see <http://www.gnu.org/licenses/>.
+;
+; Outputs to the LEDs whichever sense switch is flipped until no switches are flipped
+; in which case the program spits out Hello, world and exits.
+;
+; This serves no real purpose other than demonstrating concepts as a toy.
+
+BDOS	equ	0005h
+WRITESTR	equ	09h
+WRITECHR	equ	02h
+CONSTAT	equ	0bh
+EOS	equ	00h
+CR	equ	0dh
+LF	equ	0ah
+
+	org	0100h
+	lxi	h, 0
+	mvi	d, 080h
+
+run:
+	ldax	d
+	ldax	d
+	ldax	d
+	ldax	d
+	dad	b
+	jnc	run
+	in	0ffh
+	mov	d, a
+	CPI	0
+	jz	print
+	jmp	run
+
+print:
+	push	h
+	push	b
+	mvi	c, WRITESTR
+	lxi	d, cls
+	call	BDOS
+	pop	b
+	pop	h
+
+	push	h
+	push	b
+	lxi	d, textstr
+	mvi	c, WRITESTR
+	call	BDOS
+	pop	b
+	pop	h
+	jmp	exit
+
+exit:
+	ret
+
+
+textstr:	db	CR, LF, 'Hello, world', CR, LF, 24H 
+cls:       db       1bh, '[2J$'        ; ANSI clear screen: ESC [ 2 J
+home:      db       1bh, '[H$'         ; ANSI go to screen home: ESC [ H
+
+	end