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collapseos/arch/z80/sms/xcomp.fs

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sms: WIP !
2020-05-14 22:15:31 -04:00
( 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
2020-06-28 19:45:28 -04:00
RS_ADDR 0x80 - CONSTANT SYSVARS
0xc000 CONSTANT HERESTART
sms: add support for VDP's text mode Because that mode behaves exactly like in a regular TMS9918, a new driver for TMS9918 has been added in blkfs and SMS' VDP now uses it. Also, fix broken 5x7 font.
2020-11-13 12:15:20 -05:00
0xbf CONSTANT TMS_CTLPORT
0xbe CONSTANT TMS_DATAPORT
Add Grid subsystem The goal is to offload the SMS VDP driver a little bit.
2020-11-09 17:15:41 -05:00
SYSVARS 0x70 + CONSTANT GRID_MEM
grid: add XYMODE In VE on the SMS, the first contents line would always be cleared because of NEWLN being called when the FBUF would spit its last char. Inconvenient... I've added a "graphical" mode to the grid subsystem to inhibit this behavior in a graphical situation such as in VE. Also, write a more complete Grid documentation.
2020-11-14 22:35:08 -05:00
SYSVARS 0x73 + 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.
2020-11-02 18:53:57 -05:00
0x3f CONSTANT CPORT_CTL
0xdc CONSTANT CPORT_D1
0xdd CONSTANT CPORT_D2
grid: add XYMODE In VE on the SMS, the first contents line would always be cleared because of NEWLN being called when the FBUF would spit its last char. Inconvenient... I've added a "graphical" mode to the grid subsystem to inhibit this behavior in a graphical situation such as in VE. Also, write a more complete Grid documentation.
2020-11-14 22:35:08 -05:00
SYSVARS 0x74 + 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.
2020-09-21 17:51:08 -04:00
5 LOAD ( z80 assembler )
sms: WIP !
2020-05-14 22:15:31 -04:00
262 LOAD ( xcomp )
524 LOAD ( font compiler )
sms: generate TMR SEGA signature in Collapse OS itself Having the signature generation code in /tools prevents self-hosting on the SMS.
2020-11-25 21:42:07 -05:00
165 LOAD ( Sega ROM signer )
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.
2020-06-26 21:41:17 -04:00
282 LOAD ( boot.z80.decl )
sms: WIP !
2020-05-14 22:15:31 -04:00
270 LOAD ( xcomp overrides )
Have FILL use indirect memory access This allows SMS xcomp to use ALLOT0 instead of ZFILL,
2020-12-07 19:17:51 -05:00
DI, 0x100 JP, 0x62 ALLOT0 ( 0x66 )
RETN, 0x98 ALLOT0 ( 0x100 )
sms: WIP !
2020-05-14 22:15:31 -04:00
( 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.
2020-06-26 21:41:17 -04:00
283 335 LOADR ( boot.z80 )
Move Cross-compiled core from B390 to B350 and renamed it "Core words". Also, reworded the presentation.
2020-05-15 22:44:49 -04:00
353 LOAD ( xcomp core low )
sms: WIP !
2020-05-14 22:15:31 -04:00
CREATE ~FNT CPFNT7x7
sms: add support for VDP's text mode Because that mode behaves exactly like in a regular TMS9918, a new driver for TMS9918 has been added in blkfs and SMS' VDP now uses it. Also, fix broken 5x7 font.
2020-11-13 12:15:20 -05:00
470 472 LOADR ( TMS9918 )
602 604 LOADR ( VDP )
Add Grid subsystem The goal is to offload the SMS VDP driver a little bit.
2020-11-09 17:15:41 -05:00
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.
2020-11-02 18:53:57 -05:00
625 626 LOADR ( SMS ports )
recipes/sms: move recipe blocks into local overlay
2020-09-20 10:21:21 -04:00
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.
2020-10-28 18:06:58 -04:00
390 LOAD ( xcomp core high )
sms: WIP !
2020-05-14 22:15:31 -04:00
(entry) _
( Update LATEST )
PC ORG @ 8 + !
grid: add XYMODE In VE on the SMS, the first contents line would always be cleared because of NEWLN being called when the FBUF would spit its last char. Inconvenient... I've added a "graphical" mode to the grid subsystem to inhibit this behavior in a graphical situation such as in VE. Also, write a more complete Grid documentation.
2020-11-14 22:35:08 -05:00
," VDP$ GRID$ PAD$ (im1) " EOT,
sms: generate TMR SEGA signature in Collapse OS itself Having the signature generation code in /tools prevents self-hosting on the SMS.
2020-11-25 21:42:07 -05:00
ORG @ 0x100 - DUP 256 /MOD 2 PC! 2 PC!
DUP 1 ( 16K ) segasig
0x4000 + 256 /MOD 2 PC! 2 PC!
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