MESS SVN History

15994 Revisions

r15213 Thursday 17th May, 2012 at 14:19:46 UTC by Robbbert
Text updates.

[src/mess/drivers]

cd2650.c dolphin.c pipbug.c

src/mess/drivers/pipbug.c
r15212	r15213
8	8	All input must be in uppercase.
9	9
10	10	Commands:
11		A — See and alter memory
12		B — Set breakpoint (2 permitted)
13		C — Clear breakpoint
14		D — Dump memory to paper tape
15		G — Go to address, run
16		L — Load memory from paper tape
17		S — See and alter registers
	11	A - See and alter memory
	12	B - Set breakpoint (2 permitted)
	13	C - Clear breakpoint
	14	D - Dump memory to paper tape
	15	G - Go to address, run
	16	L - Load memory from paper tape
	17	S - See and alter registers
18	18
19	19	PIPBUG isn't a computer; it is a the name of the bios used
20	20	in a number of small 2650-based computers from 1976 to 1978.

src/mess/drivers/dolphin.c
r15212	r15213
47	47
48	48
49	49	Thanks to Amigan site for various documents.
50		We used Winarcadia emulator to get an idea of what the computer
51		should look like, but we DID NOT look at the source code.
52	50
	51
53	52	****************************************************************************/
54	53
55	54	#include "emu.h"

src/mess/drivers/cd2650.c
r15212	r15213
17	17	TODO
18	18	- Lots, probably. The computer is a complete mystery. No pictures,
19	19	manuals or schematics exist.
20		- Find out how the scrolling works - if it scrolls at all.
21	20	- Using the terminal keyboard, as it is unknown if it has its own.
22	21	- Cassette interface.
	22	- Need the proper chargen rom.
23	23
24		We used Winarcadia emulator to get an idea of what the computer
25		might possibly look like, but we DID NOT read the source code.
26
27	24	****************************************************************************/
28	25
29	26	#include "emu.h"
r15212	r15213
98	95	/* The video is unusual in that the characters in each line are spaced at 16 bytes in memory,
99	96	thus line 1 starts at 1000, line 2 at 1001, etc. There are 16 lines of 80 characters.
100	97	Further, the letters have bit 6 set low, thus the range is 01 to 1A.
101		When the bottom of the screen is reached, it does not scroll, it just wraps around.
102		There is no scroll register or any indication of how scrolling might be accomplished. */
	98	When the bottom of the screen is reached, it does not scroll, it just wraps around. */
103	99
104		UINT16 offset = 0; ~~// if we figure out how the scrolling works, that calculation goes here~~
	100	UINT16 offset = 0;
105	101	UINT8 y,ra,chr,gfx;
106	102	UINT16 sy=0,x,mem;
107	103

15994 Revisions