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author AJR <ajrhacker@users.noreply.github.com>2017-11-10 13:12:38 -0500
committer AJR <ajrhacker@users.noreply.github.com>2017-11-10 13:12:38 -0500
commita2be3de956dab0f9a8d5b56ea936f329f6396bde (patch)
tree02c312d6569001a0a747918cc756fd45823eb811
parentfee21b0a91503d860449f1a497fa3dca518ee3c9 (diff)
qtsbc: Add notes (nw)
-rw-r--r--src/mame/drivers/qtsbc.cpp17
1 files changed, 17 insertions, 0 deletions
diff --git a/src/mame/drivers/qtsbc.cpp b/src/mame/drivers/qtsbc.cpp
index 0fa5f249c4e..988bcfeee41 100644
--- a/src/mame/drivers/qtsbc.cpp
+++ b/src/mame/drivers/qtsbc.cpp
@@ -6,6 +6,8 @@ QT Computer Systems SBC +2/4
2009-12-11 Skeleton driver.
+This looks like the same system as the Compu/Time SBC-880 Processor Board.
+
Currently it crashes. There's a memory move routine at 50A4, and after
a few turns it is told to move E603 bytes which corrupts everything.
@@ -15,6 +17,20 @@ Chips: P8251, D8253C, MK3880N-4 (Z80). 3x 6-sw dips. Unmarked crystal.
There's a blue jumper marked 4M and 2M. Assumed to be selectable CPU clock.
Also assumed this is what the "2/4" in the name refers to.
+Feature list from QT ad:
+- 1K RAM (which can be located at any 1K boundary) plus one each
+ Parallel and Serial I/O ports on board
+- Power on jump to onboard EPROM (2708 or 2716)
+- EPROM addressable on any 1K or 2K boundary
+- Full 64K use of RAM allowed in shadow mode
+- Programmable Baud rate selection, 110-9600
+- 2 or 4MHz switch selectable
+- DMA capability allows MWRT signal generation on CPU board or elsewhere
+ in system under DMA logic or front panel control
+- Two programmable timers available for use by programs run with the
+ SBC+2/4 (timer output and controls available at parallel I/O connector;
+ parallel input and output ports available for use on CPU board).
+
****************************************************************************/
#include "emu.h"
@@ -22,6 +38,7 @@ Also assumed this is what the "2/4" in the name refers to.
#include "machine/i8251.h"
#include "machine/pit8253.h"
#include "bus/rs232/rs232.h"
+//#include "bus/s100/s100.h"
class qtsbc_state : public driver_device