collapseos/arch/z80/sms/xcomp.fs

( 8K of onboard RAM )
0xdd00 CONSTANT RS_ADDR
( Memory register at the end of RAM. Must not overwrite )
0xddca CONSTANT PS_ADDR
RS_ADDR 0x80 - CONSTANT SYSVARS
0xc000 CONSTANT HERESTART
0xbf   CONSTANT VDP_CTLPORT
0xbe   CONSTANT VDP_DATAPORT
SYSVARS 0x70 + CONSTANT GRID_MEM
SYSVARS 0x72 + CONSTANT CPORT_MEM
0x3f   CONSTANT CPORT_CTL
0xdc   CONSTANT CPORT_D1
0xdd   CONSTANT CPORT_D2
SYSVARS 0x73 + CONSTANT PAD_MEM
5 LOAD  ( z80 assembler )
: ZFILL, ( u ) 0 DO 0 A, LOOP ;
262 LOAD  ( xcomp )
524 LOAD  ( font compiler )
282 LOAD  ( boot.z80.decl )
270 LOAD  ( xcomp overrides )

DI, 0x100 JP, 0x62 ZFILL, ( 0x66 )
RETN, 0x98 ZFILL, ( 0x100 )
( All set, carry on! )
CURRENT @ XCURRENT !
0x100 BIN( !
283 335 LOADR ( boot.z80 )
353 LOAD  ( xcomp core low )
CREATE ~FNT CPFNT7x7
603 608 LOADR ( VDP )
402 404 LOADR ( Grid )
625 626 LOADR ( SMS ports )
612 617 LOADR ( PAD )
390 LOAD  ( xcomp core high )
(entry) _
( Update LATEST )
PC ORG @ 8 + !
," VDP$ 0 0 AT-XY PAD$ (im1) " EOT,
ORG @ 0x100 - 256 /MOD 2 PC! 2 PC!
H@ 256 /MOD 2 PC! 2 PC!
sms: WIP ! 2020-05-15 12:15:31 +10:00			`( 8K of onboard RAM )`
			`0xdd00 CONSTANT RS_ADDR`
			`( Memory register at the end of RAM. Must not overwrite )`
			`0xddca CONSTANT PS_ADDR`
Add HERESTART xcomp config 2020-06-29 09:45:28 +10:00			`RS_ADDR 0x80 - CONSTANT SYSVARS`
			`0xc000 CONSTANT HERESTART`
sms: WIP ! 2020-05-15 12:15:31 +10:00			`0xbf CONSTANT VDP_CTLPORT`
			`0xbe CONSTANT VDP_DATAPORT`
Add Grid subsystem The goal is to offload the SMS VDP driver a little bit. 2020-11-10 09:15:41 +11:00			`SYSVARS 0x70 + CONSTANT GRID_MEM`
sms: CPORT_CTL is write-only! why did I think that I could read from it? 2020-11-09 00:43:24 +11:00			`SYSVARS 0x72 + CONSTANT CPORT_MEM`
sms: simplify and solidify ports-related drivers Add _TRA!, _THA!, _TRB!, _THB! routines to easily handle those pins' value without stepping on other pins like the drivers previously did. For SDC driver, it's going to be important soon because it turns out that I can't get away with "always on" CS, so I'll need a scheme where it's important that TH/TR pins have stable values. 2020-11-03 10:53:57 +11:00			`0x3f CONSTANT CPORT_CTL`
			`0xdc CONSTANT CPORT_D1`
			`0xdd CONSTANT CPORT_D2`
sms: CPORT_CTL is write-only! why did I think that I could read from it? 2020-11-09 00:43:24 +11:00			`SYSVARS 0x73 + CONSTANT PAD_MEM`
Move z80a from B200 to B5 The idea is to consider assemblers as "runtime" apps instead of placing them in the "bootstrap" section of the blocks. These apps will be used for much more than bootstrapping. Moved its documentation to doc/asm.txt and made its code blocks more compact. 2020-09-22 07:51:08 +10:00			`5 LOAD ( z80 assembler )`
sms: WIP ! 2020-05-15 12:15:31 +10:00			`: ZFILL, ( u ) 0 DO 0 A, LOOP ;`
			`262 LOAD ( xcomp )`
			`524 LOAD ( font compiler )`
z80: make boot binary a 2-part process Previously, recipes that began spitting binary contents before loading block 282 would end up with VARIABLE code in their binary, thus breaking them. We fix this by making this loading process 2-part. 2020-06-27 11:41:17 +10:00			`282 LOAD ( boot.z80.decl )`
sms: WIP ! 2020-05-15 12:15:31 +10:00			`270 LOAD ( xcomp overrides )`

sms: explicitly set ourselves in IM 1 I'm not sure if not setting IM 1 explicitly can be the source of bugs, but SMS Power's tutorial mentions that everyone is doing it, so... 2020-10-11 04:31:54 +11:00			`DI, 0x100 JP, 0x62 ZFILL, ( 0x66 )`
sms: WIP ! 2020-05-15 12:15:31 +10:00			`RETN, 0x98 ZFILL, ( 0x100 )`
			`( All set, carry on! )`
			`CURRENT @ XCURRENT !`
			`0x100 BIN( !`
z80: make boot binary a 2-part process Previously, recipes that began spitting binary contents before loading block 282 would end up with VARIABLE code in their binary, thus breaking them. We fix this by making this loading process 2-part. 2020-06-27 11:41:17 +10:00			`283 335 LOADR ( boot.z80 )`
Move Cross-compiled core from B390 to B350 and renamed it "Core words". Also, reworded the presentation. 2020-05-16 12:44:49 +10:00			`353 LOAD ( xcomp core low )`
sms: WIP ! 2020-05-15 12:15:31 +10:00			`CREATE ~FNT CPFNT7x7`
recipes/sms: move recipe blocks into local overlay 2020-09-21 00:21:21 +10:00			`603 608 LOADR ( VDP )`
Add Grid subsystem The goal is to offload the SMS VDP driver a little bit. 2020-11-10 09:15:41 +11:00			`402 404 LOADR ( Grid )`
sms: simplify and solidify ports-related drivers Add _TRA!, _THA!, _TRB!, _THB! routines to easily handle those pins' value without stepping on other pins like the drivers previously did. For SDC driver, it's going to be important soon because it turns out that I can't get away with "always on" CS, so I'll need a scheme where it's important that TH/TR pins have stable values. 2020-11-03 10:53:57 +11:00			`625 626 LOADR ( SMS ports )`
recipes/sms: move recipe blocks into local overlay 2020-09-21 00:21:21 +10:00			`612 617 LOADR ( PAD )`
Move most of the high layer of comp core into the low one With KEY and EMIT being switch words, most of the high layer can be defined before drivers. In addition to this change, I've compacted core blocks which were becoming quite sparse. 2020-10-29 09:06:58 +11:00			`390 LOAD ( xcomp core high )`
sms: WIP ! 2020-05-15 12:15:31 +10:00			`(entry) _`
			`( Update LATEST )`
			`PC ORG @ 8 + !`
Add Grid subsystem The goal is to offload the SMS VDP driver a little bit. 2020-11-10 09:15:41 +11:00			`," VDP$ 0 0 AT-XY PAD$ (im1) " EOT,`
sms: WIP ! 2020-05-15 12:15:31 +10:00			`ORG @ 0x100 - 256 /MOD 2 PC! 2 PC!`
			`H@ 256 /MOD 2 PC! 2 PC!`