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This commit is contained in:
Daniele Verducci (ZenPenguin)
2021-07-11 09:49:42 +02:00
parent 1c77bc82ac
commit aa844687c8
47 changed files with 697 additions and 71 deletions
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20
pat80-io-devices/composite-pal-adapter/software/avr-assembly/character_generator.asm
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@ -2,7 +2,25 @@
; * PAT80 COMPOSITE PAL VIDEO ADAPTER *
; * Character generator module *
; *******************************************
;
; @language: AVR ASM
;
; This file is part of Pat80 IO Devices.
;
; Pat80 IO Devices is free software: you can redistribute it and/or modify
; it under the terms of the GNU General Public License as published by
; the Free Software Foundation, either version 3 of the License, or
; (at your option) any later version.
;
; Pat80 IO Devices is distributed in the hope that it will be useful,
; but WITHOUT ANY WARRANTY; without even the implied warranty of
; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
; GNU General Public License for more details.
;
; You should have received a copy of the GNU General Public License
; along with Pat80 IO Devices. If not, see <http://www.gnu.org/licenses/>.
;
;
; This module generates the character pixels using the font present in rom
; and adds it on the framebuffer in the position indicated by POS_COARSE (Y).

20
pat80-io-devices/composite-pal-adapter/software/avr-assembly/communication.asm
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@ -2,7 +2,25 @@
; * PAT80 COMPOSITE PAL VIDEO ADAPTER *
; * Communication module *
; *******************************************
;
; @language: AVR ASM
;
; This file is part of Pat80 IO Devices.
;
; Pat80 IO Devices is free software: you can redistribute it and/or modify
; it under the terms of the GNU General Public License as published by
; the Free Software Foundation, either version 3 of the License, or
; (at your option) any later version.
;
; Pat80 IO Devices is distributed in the hope that it will be useful,
; but WITHOUT ANY WARRANTY; without even the implied warranty of
; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
; GNU General Public License for more details.
;
; You should have received a copy of the GNU General Public License
; along with Pat80 IO Devices. If not, see <http://www.gnu.org/licenses/>.
;
;
; This module manages the communication between Pat80 and
; the video adapter.

18
pat80-io-devices/composite-pal-adapter/software/avr-assembly/main.asm
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@ -1,5 +1,23 @@
; VIDEO COMPOSITE PAL IO DEVICE
;
; @language: AVR ASM
;
; This file is part of Pat80 IO Devices.
;
; Pat80 IO Devices is free software: you can redistribute it and/or modify
; it under the terms of the GNU General Public License as published by
; the Free Software Foundation, either version 3 of the License, or
; (at your option) any later version.
;
; Pat80 IO Devices is distributed in the hope that it will be useful,
; but WITHOUT ANY WARRANTY; without even the implied warranty of
; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
; GNU General Public License for more details.
;
; You should have received a copy of the GNU General Public License
; along with Pat80 IO Devices. If not, see <http://www.gnu.org/licenses/>.
;
;
; INTERFACING WITH PAT80:
; Use PortB as data port. Before writing anything, issue a read (pin RW HIGH) and check the busy pin on the data port.
; If the busy pin is high, retry reading until goes low. When the busy pin goes low, we have... TODO

18
pat80-io-devices/composite-pal-adapter/software/avr-assembly/video_generator.asm
View File

@ -2,6 +2,24 @@
; * PAT80 COMPOSITE PAL VIDEO ADAPTER *
; * Video generator module *
; *******************************************
;
; @language: AVR ASM
;
; This file is part of Pat80 IO Devices.
;
; Pat80 IO Devices is free software: you can redistribute it and/or modify
; it under the terms of the GNU General Public License as published by
; the Free Software Foundation, either version 3 of the License, or
; (at your option) any later version.
;
; Pat80 IO Devices is distributed in the hope that it will be useful,
; but WITHOUT ANY WARRANTY; without even the implied warranty of
; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
; GNU General Public License for more details.
;
; You should have received a copy of the GNU General Public License
; along with Pat80 IO Devices. If not, see <http://www.gnu.org/licenses/>.
; Uses registers X(R27, R26), STATUS (R25), VG_HIGH_ACCUM (r24), LINE_COUNTER (r23)