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cd2650: Miscellaneous notes and corrections (nw)

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AJR 2017-11-05 15:55:25 -05:00
parent d1ee73204a
commit 58e7ffe252
1 changed files with 8 additions and 1 deletions
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src/mame/drivers/cd2650.cpp
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@ -10,6 +10,8 @@ No info available on this computer apart from a few newsletters and
magazine articles. The computer was described in a series of articles magazine articles. The computer was described in a series of articles
published between April and June 1977 in Radio-Electronics, which include published between April and June 1977 in Radio-Electronics, which include
supposedly complete schematics and fairly detailed subsystem descriptions. supposedly complete schematics and fairly detailed subsystem descriptions.
There is supposed to be a “Computer System Manual” with definitive revised
schematics, but this has not been found yet.
All signals to and from the 2650 board (including the built-in 300 baud All signals to and from the 2650 board (including the built-in 300 baud
Kansas City standard cassette tape interface) are passed through six ribbon Kansas City standard cassette tape interface) are passed through six ribbon
@ -90,6 +92,8 @@ private:
WRITE_LINE_MEMBER(cd2650_state::tape_deck_on_w) WRITE_LINE_MEMBER(cd2650_state::tape_deck_on_w)
{ {
// output polarity not verified
logerror("Cassette tape deck turned %s\n", state ? "on" : "off");
} }
WRITE_LINE_MEMBER(cd2650_state::cass_w) WRITE_LINE_MEMBER(cd2650_state::cass_w)
@ -285,8 +289,11 @@ static MACHINE_CONFIG_START( cd2650 )
MCFG_DEVICE_ADD("outlatch", F9334, 0) // IC26 MCFG_DEVICE_ADD("outlatch", F9334, 0) // IC26
MCFG_ADDRESSABLE_LATCH_Q0_OUT_CB(WRITELINE(cd2650_state, tape_deck_on_w)) // TD ON MCFG_ADDRESSABLE_LATCH_Q0_OUT_CB(WRITELINE(cd2650_state, tape_deck_on_w)) // TD ON
MCFG_ADDRESSABLE_LATCH_Q1_OUT_CB(DEVWRITELINE("beeper", beep_device, set_state)) // which is this? MCFG_ADDRESSABLE_LATCH_Q7_OUT_CB(DEVWRITELINE("beeper", beep_device, set_state)) // OUT6
// Q1-Q7 = OUT 0-6, not defined in RE // Q1-Q7 = OUT 0-6, not defined in RE
// The connection of OUT6 to a 700-1200 Hz noise generator is suggested
// in Central Data 2650 Newsletter, Volume 1, Issue 3 for use with the
// "Morse Code" program by Mike Durham.
/* video hardware */ /* video hardware */
MCFG_SCREEN_ADD("screen", RASTER) MCFG_SCREEN_ADD("screen", RASTER)