collapseos/arch/z80/rc2014/blk.fs

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( ----- 600 )
601 MC6850 driver 606 Zilog SIO driver
615 SPI relay 619 Xcomp unit
( ----- 601 )
( MC6850 Driver. Load range B601-B603. Requires:
6850_CTL for control register
6850_IO for data register.
CTL numbers used: 0x16 = no interrupt, 8bit words, 1 stop bit
64x divide. 0x56 = RTS high )
: _rts 0x16 ( RTS low ) [ 6850_CTL LITN ] PC! ;
: _rts^ 0x56 ( RTS high ) [ 6850_CTL LITN ] PC! ;
: 6850<? ( -- c? f )
[ 6850_CTL LITN ] PC@ 1 AND ( is rcv buff full ? )
NOT IF ( RTS low, then wait 1ms and try again )
_rts 10 TICKS ( 1ms ) _rts^
[ 6850_CTL LITN ] PC@ 1 AND ( is rcv buff full ? )
NOT IF 0 EXIT THEN
THEN [ 6850_IO LITN ] PC@ ( c ) 1 ( f ) ;
( ----- 602 )
CODE 6850>
HL POP, chkPS,
BEGIN,
6850_CTL INAi, 0x02 ANDi, ( are we transmitting? )
JRZ, ( yes, loop ) AGAIN,
A L LDrr, 6850_IO OUTiA,
;CODE
( ----- 603 )
: (key?) 6850<? ;
: (emit) 6850> ;
: 6850$ 0x56 ( RTS high ) [ 6850_CTL LITN ] PC! ;
( ----- 605 )
( Zilog SIO driver. Load range B605-607. Requires:
SIOA_CTL for ch A control register
SIOA_DATA for ch A data register
SIOB_CTL for ch B control register
SIOB_DATA for ch B data register )
: _<? ( io ctl -- c? f )
DUP ( io ctl ctl ) PC@ 1 AND ( is rcv buff full ? )
NOT IF ( io ctl )
0x05 ( PTR5 ) OVER PC! 0b01101000 OVER PC! ( RTS low )
10 TICKS ( 1ms )
0x05 ( PTR5 ) OVER PC! 0b01101010 OVER PC! ( RTS high )
PC@ 1 AND ( is rcv buff full ? )
NOT IF DROP 0 ( f ) EXIT THEN
ELSE DROP THEN ( io ) PC@ ( c ) 1 ( f ) ;
: SIOA<? [ SIOA_DATA LITN SIOA_CTL LITN ] _<? ;
( ----- 606 )
CODE SIOA>
HL POP, chkPS,
BEGIN,
SIOA_CTL INAi, 0x04 ANDi, ( are we transmitting? )
JRZ, ( yes, loop ) AGAIN,
A L LDrr, SIOA_DATA OUTiA,
;CODE
CREATE _ ( init data ) 0x18 C, ( CMD3 )
0x24 C, ( CMD2/PTR4 ) 0b11000100 C, ( WR4/64x/1stop/nopar )
0x03 C, ( PTR3 ) 0b11000001 C, ( WR3/RXen/8char )
0x05 C, ( PTR5 ) 0b01101010 C, ( WR5/TXen/8char/RTS )
0x21 C, ( CMD2/PTR1 ) 0 C, ( WR1/Rx no INT )
: SIOA$ 9 0 DO _ I + C@ [ SIOA_CTL LITN ] PC! LOOP ;
( ----- 607 )
: SIOB<? [ SIOB_DATA LITN SIOB_CTL LITN ] _<? ;
CODE SIOB>
HL POP, chkPS,
BEGIN,
SIOB_CTL INAi, 0x04 ANDi, ( are we transmitting? )
JRZ, ( yes, loop ) AGAIN,
A L LDrr, SIOB_DATA OUTiA,
;CODE
: SIOB$ 9 0 DO _ I + C@ [ SIOB_CTL LITN ] PC! LOOP ;
( ----- 619 )
( RC2014 classic with MC6850 )
0xff00 CONSTANT RS_ADDR 0xfffa CONSTANT PS_ADDR
RS_ADDR 0xa0 - CONSTANT SYSVARS
0x8000 CONSTANT HERESTART
0x80 CONSTANT 6850_CTL 0x81 CONSTANT 6850_IO
4 CONSTANT SPI_DATA 5 CONSTANT SPI_CTL 1 CONSTANT SDC_DEVID
5 LOAD ( z80 assembler )
262 LOAD ( xcomp ) 282 LOAD ( boot.z80.decl )
270 LOAD ( xcomp overrides ) 283 335 LOADR ( boot.z80 )
353 LOAD ( xcomp core low ) 601 603 LOADR ( MC6850 )
2020-12-12 10:08:16 -05:00
419 LOAD ( SPI relay ) 423 436 LOADR ( SD Card )
400 LOAD ( AT28 )
390 LOAD ( xcomp core high )
(entry) _
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PC ORG @ 8 + ! ( Update LATEST )
," 6850$ BLK$ " EOT,
2020-12-12 10:08:16 -05:00
( ----- 620 )
( RC2014 classic with SIO )
0xff00 CONSTANT RS_ADDR 0xfffa CONSTANT PS_ADDR
RS_ADDR 0xa0 - CONSTANT SYSVARS
2020-12-12 10:08:16 -05:00
0x8000 CONSTANT HERESTART
0x80 CONSTANT SIOA_CTL 0x81 CONSTANT SIOA_DATA
0x82 CONSTANT SIOB_CTL 0x83 CONSTANT SIOB_DATA
2020-12-12 10:08:16 -05:00
4 CONSTANT SPI_DATA 5 CONSTANT SPI_CTL 1 CONSTANT SDC_DEVID
5 LOAD ( z80 assembler )
262 LOAD ( xcomp ) 282 LOAD ( boot.z80.decl )
270 LOAD ( xcomp overrides ) 283 335 LOADR ( boot.z80 )
353 LOAD ( xcomp core low ) 605 607 LOADR ( SIO )
2020-12-12 10:08:16 -05:00
419 LOAD ( SPI relay ) 423 436 LOADR ( SD Card )
400 LOAD ( AT28 ) : (key?) SIOA<? ; : (emit) SIOA> ;
2020-12-12 10:08:16 -05:00
390 LOAD ( xcomp core high )
(entry) _ PC ORG @ 8 + ! ( Update LATEST )
," SIOA$ BLK$ " EOT,