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author | AJR <ajrhacker@users.noreply.github.com> | 2017-11-10 13:12:38 -0500 |
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committer | AJR <ajrhacker@users.noreply.github.com> | 2017-11-10 13:12:38 -0500 |
commit | a2be3de956dab0f9a8d5b56ea936f329f6396bde (patch) | |
tree | 02c312d6569001a0a747918cc756fd45823eb811 | |
parent | fee21b0a91503d860449f1a497fa3dca518ee3c9 (diff) |
qtsbc: Add notes (nw)
-rw-r--r-- | src/mame/drivers/qtsbc.cpp | 17 |
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 |