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r39865 Tuesday 21st July, 2015 at 00:04:25 UTC by Joakim Larsson Edström
Figured out that ROM:s support a Centronics printer on P2
[src/mess/drivers]force68k.c

trunk/src/mess/drivers/force68k.c
r248376r248377
2626OAO 000 - OBF FFF USER EPROMArea
27270C0 041 - 0C0 043 ACIA (P3) Host
28280C0 080 - 0C0 082 ACIA (P4) Terminal
290C0 101 - 0C0 103 ACIA (P5) Remote device (eg printer)
290C0 101 - 0C0 103 ACIA (P5) Remote device (eg serial printer)
30300C0 401 - 0C0 42F RTC
31OEO 001 - 0E0 035 PI/T
31OEO 001 - 0E0 035 PI/T (eg centronics printer)
3232OEO 200 - 0E0 2FF FPU
3333OEO 300 - 0E0 300 Reset Off
3434OEO 380 - 0E0 380 Reset On
r248376r248377
7878    TODO:
7979    - Finish 2 x ACIA6850, host and remote interface left, terminal works
8080    - Finish 1 x 68230 Motorola, Parallel Interface / Timer
81      - Connect Port B to a Centronics printer interface
8182    - Add 1 x Abort Switch
8283    - Add configurable serial connector between ACIA:s and
8384      - Real terminal emulator, ie rs232 "socket"
r248376r248377
253254   /* RTC Real Time Clock device */
254255   MCFG_DEVICE_ADD("rtc", MM58167, XTAL_32_768kHz)
255256
256   /* PIT Parallel Interface and Timer device */
257   MCFG_DEVICE_ADD("pit", PIT68230, 0)
257   /* PIT Parallel Interface and Timer device, assuming strapped for on board clock */
258   MCFG_DEVICE_ADD("pit", PIT68230, XTAL_16MHz / 2)
258259
259260MACHINE_CONFIG_END
260261
r248376r248377
312313   MM <address> [<data» [;<options» <CR>       Memory Modify
313314   MS <address> <data1 > <data2> < ... <CR>    Memory Set - starting at addr with data 1. data 2 ...
314315   NOBR [<address> ... ] <CR>                  Remove Breakpoint
315   NOPA <CR>                                   Printer Detach
316   NOPA <CR>                                   Printer Detach (Centronics on PIT/P2)
316317   OF <CR>                                     Offset
317   PA <CR>                                     Printer Attach
318   PA <CR>                                     Printer Attach (Centronics on PIT/P2)
318319   PF[n] <CR>                                  Set/display Port Format
319320   RM <CR>                                     Register Modify
320321   TM [<exit character» <CR>                   Transparent Mode


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